01 / Definition
What is Hastelloy B-3 / Alloy B-3 (UNS N10675)?
Hastelloy B-3 — equally correctly called Alloy B-3 — is a solid-solution nickel-molybdenum alloy designated UNS N10675 and W.Nr. 2.4600, sometimes written NiMo29Cr. Its nominal composition of 65 % nickel and 28.5 % molybdenum gives it the highest resistance of any commercial wrought alloy to hydrochloric acid across the full concentration range and up to the boiling point. Small, deliberate additions of chromium (1–3 %) and iron (1–3 %) distinguish it from the earlier B-type alloys and are the reason it exists.
The problem those additions solve is long-range ordering. Binary nickel-molybdenum alloys such as Alloy B-2 (UNS N10665) transform part of their face-centred-cubic matrix into brittle ordered Ni₄Mo (β) and Ni₃Mo intermetallic phases when held anywhere between roughly 550 °C and 750 °C. A weld heat-affected zone passes through that band on every pass, which is why B-2 fabrications so often cracked and needed a full re-solution anneal after welding. The controlled Cr and Fe content of Hastelloy B-3 slows that ordering reaction by orders of magnitude, so UNS N10675 can normally be placed in service in the as-welded condition. That single metallurgical change is what moved the B-series from a difficult specialty material to a practical construction alloy for reactors, columns and heat exchangers.
Alloy B-3 is austenitic and therefore essentially non-magnetic, ductile in the annealed condition (typically above 50 % elongation), and highly resistant to chloride-induced pitting, crevice corrosion and stress corrosion cracking. It also withstands fluoride-bearing media and concentrated sulfuric acid, two environments that destroy zirconium equipment.
The one limitation that decides every specification
Hastelloy B-3 has essentially no resistance to oxidising media. With only 1–3 % chromium it cannot form a protective chromium-oxide film. Nitric acid, ferric (Fe³⁺) and cupric (Cu²⁺) salts, hypochlorite, wet chlorine, persulphates and aerated oxidising acids attack it rapidly. In practice the failure mode is almost never the acid itself. It is contamination: a few hundred ppm of dissolved ferric ion picked up from upstream carbon-steel piping can raise the corrosion rate in hydrochloric acid by an order of magnitude. If your stream is even intermittently oxidising, specify Hastelloy C-276 (UNS N10276), C-22 (UNS N06022) or Alloy 59 (UNS N06059) instead. The corrosion compatibility checker below will settle it.
Hastelloy B-3 or Alloy B-3? One alloy, two names
Hastelloy B-3 and Alloy B-3 are the same material. They are not two grades, not two quality levels and not two chemistries. Both names point to the single nickel-molybdenum composition standardised as UNS N10675 in the United States and W.Nr. 2.4600 (NiMo29Cr) in Europe, and covered by ASTM B564, B462, B335 and B333. Anywhere on this page that one name appears, the other could be substituted without changing the meaning.
The difference is only in where the name comes from:
- Hastelloy® B-3® is the brand name. HASTELLOY® and B-3® are registered trademarks of Haynes International, Inc., which developed the alloy. It is the name most engineers know, the name that appears on legacy drawings, and by a wide margin the name most often typed into a search box.
- Alloy B-3 is the generic, trademark-free form of the same name, used by mills, forge shops and distributors worldwide who make the identical chemistry without licence to the brand.
- UNS N10675 / W.Nr. 2.4600 are the standardised designations. These are the ones that carry contractual weight, because they are defined by a standards body rather than owned by a company.
What that means for a purchase order. Send us an enquiry written either way — "Hastelloy B-3 forged ring" or "Alloy B-3 forged ring" — and you will get the same quotation for the same material. For the order itself, write UNS N10675 + the ASTM product specification and add either trade name as a cross-reference. That is unambiguous in any jurisdiction and cannot be misread by a receiving inspector. What you should not write is "Hastelloy B" on its own: that spans three different alloys with three different weldabilities. See common ordering mistakes.
Jiangyin Jiangnan Metal Co., Ltd. forges and certifies this alloy as UNS N10675 / W.Nr. 2.4600 / ASTM B564. We are not a Haynes International licensee and we do not supply Haynes-branded material; we reference the Hastelloy B-3 name descriptively, so that engineers who know the alloy by its brand can find the generic equivalent.
02 / Cross-reference
Hastelloy B-3 / Alloy B-3 equivalent designations and governing standards
Engineers reach this alloy through many different names. Every designation in the table below refers to the same UNS N10675 chemistry, and Jiangyin Jiangnan Metal Co., Ltd. accepts purchase orders written against any of them. Because Alloy B-3 is a proprietary development rather than a legacy grade, there is no established AISI, JIS or GB equivalent. On drawings, always write UNS N10675 plus the applicable ASTM product specification.
| System / body | Designation | Covers / notes |
|---|---|---|
| USA · brand | HASTELLOY® B-3® | The name most engineers know and search for. Registered trademark of Haynes International, Inc. We supply the identical chemistry certified as UNS N10675 / ASTM B564, not Haynes-branded material. |
| Generic industry name | Alloy B-3 · Nickel Alloy B-3 | Trademark-free form of the same name, used by mills, forges and distributors. Interchangeable with Hastelloy B-3 in enquiries and correspondence |
| USA · UNS | N10675 | Unified Numbering System; the designation to use on drawings and purchase orders |
| Europe · Werkstoffnummer | 2.4600 | DIN/EN material number; also written NiMo29Cr |
| ASTM · forgings | ASTM B564 | Nickel-alloy forgings. Primary specification for our products |
| ASTM · forged fittings & flanges | ASTM B462 | Forged or rolled flanges, fittings and valves for high-temperature service |
| ASTM · billet, rod, bar | ASTM B335 | Nickel-molybdenum alloy rod; governs our incoming billet |
| ASTM · plate, sheet, strip | ASTM B333 | Flat products; relevant for tube-sheet and clad-plate comparison |
| ASTM · wrought fittings | ASTM B366 | Factory-made wrought fittings |
| ASTM · pipe & tube | ASTM B622 / B619 / B626 | Seamless pipe and tube / welded pipe / welded tube |
| ASME BPVC | SB-564 · SB-462 · SB-335 · SB-333 · SB-622 | Section II Part B equivalents for Section VIII Division 1 pressure-vessel construction |
| AWS · bare filler | A5.14 ERNiMo-10 | GTAW / GMAW / PAW matching filler (ASME SFA-5.14) |
| AWS · covered electrode | A5.11 ENiMo-10 | SMAW matching electrode (ASME SFA-5.11) |
| Sour service | NACE MR0175 / ISO 15156-3 | Solid-solution Ni-Mo alloys; acceptance is envelope-specific, confirm per order |
| Inspection document | EN 10204 3.1 / 3.2 | 3.1 mill certificate standard; 3.2 third-party witness on request |
Related but not equivalent: Alloy B-2 is UNS N10665 / W.Nr. 2.4617, and the original Alloy B is UNS N10001. Specifying "Hastelloy B" on a modern drawing is ambiguous and is the single most common source of quotation errors in this family. See common ordering mistakes.
03 / Chemistry
Chemical composition of Hastelloy B-3 / Alloy B-3 (UNS N10675)
The limits below are those of ASTM B564 / ASTM B335 for UNS N10675, which are the limits Jiangyin Jiangnan Metal Co., Ltd. procures billet against and reports on every material test certificate. Molybdenum is the element that does the work: it is what confers resistance to reducing acids. Carbon and silicon are held very low (0.01 % and 0.10 % maximum) because both promote precipitation of secondary phases at grain boundaries during welding and hot working.
| Element | Min | Max | Nominal | Metallurgical role |
|---|---|---|---|---|
| Nickel (Ni) | 65.0 | balance | 65 | Face-centred-cubic matrix; ductility and general corrosion resistance |
| Molybdenum (Mo) | 27.0 | 32.0 | 28.5 | Primary corrosion element; source of the resistance to hydrochloric and other reducing acids |
| Chromium (Cr) | 1.0 | 3.0 | 1.5 | Retards long-range ordering; too low to give oxidising resistance |
| Iron (Fe) | 1.0 | 3.0 | 1.5 | Retards ordering; improves thermal stability versus Alloy B-2 |
| Cobalt (Co) | n/a | 3.0 | n/a | Residual; restricted for nuclear service on request |
| Tungsten (W) | n/a | 3.0 | n/a | Residual solid-solution strengthener |
| Manganese (Mn) | n/a | 3.0 | n/a | Deoxidiser; sulphur control |
| Aluminium (Al) | n/a | 0.50 | n/a | Deoxidiser |
| Titanium (Ti) | n/a | 0.20 | n/a | Carbide / nitride former, grain refinement |
| Vanadium (V) | n/a | 0.20 | n/a | Residual |
| Silicon (Si) | n/a | 0.10 | n/a | Held low; promotes grain-boundary phases and hot cracking |
| Carbon (C) | n/a | 0.01 | n/a | Held very low to avoid carbide sensitisation in the weld HAZ |
| Phosphorus (P) | n/a | 0.030 | n/a | Impurity |
| Sulphur (S) | n/a | 0.010 | n/a | Impurity; controlled to avoid hot shortness during forging |
Melt route. UNS N10675 billet is procured from vacuum induction melted plus electroslag remelted (VIM + ESR) heats. Air-melted routes are not acceptable for this chemistry: the 0.01 % carbon and 0.10 % silicon ceilings cannot be held reliably without vacuum melting, and residual gas content drives hot-cracking during open-die forging. Heat number, melt route and full chemistry appear on every EN 10204 certificate we issue.
04 / Mechanical properties
Mechanical properties of Hastelloy B-3 forgings
Hastelloy B-3 is a solid-solution alloy: it cannot be strengthened by heat treatment, and its properties come from the annealed condition alone. The table below gives typical tensile behaviour of solution-annealed UNS N10675 from room temperature to 538 °C. The trend is unusual and useful: elongation rises with temperature to a peak near 316 °C, so the alloy becomes more forgiving, not less, across the normal chemical-process range.
| Test temperature | UTS (MPa) | UTS (ksi) | 0.2 % YS (MPa) | 0.2 % YS (ksi) | Elongation (%) |
|---|---|---|---|---|---|
| 21 °C / 70 °F | 862 | 125.0 | 418 | 60.6 | 53.4 |
| 93 °C / 200 °F | 832 | 120.7 | 381 | 55.3 | 56.9 |
| 204 °C / 400 °F | 758 | 110.0 | 324 | 47.0 | 59.7 |
| 316 °C / 600 °F | 720 | 104.4 | 300 | 43.5 | 63.4 |
| 427 °C / 800 °F | 703 | 102.0 | 292 | 42.4 | 62.0 |
| 538 °C / 1000 °F | 674 | 97.8 | 269 | 39.0 | 59.0 |
| Specification | UTS min | 0.2 % YS min | Elongation min | Hardness |
|---|---|---|---|---|
| ASTM B564 / B335 (UNS N10675) | 760 MPa (110 ksi) | 350 MPa (51 ksi) | 40 % | report |
| DIN 17750 (2.4600) | 750 MPa | 340 MPa | 40 % | ≤ 240 HBW |
Values are for solution-annealed material. Heavy sections may show slightly lower strength and higher elongation than thin product. Charpy V-notch impact testing is not routinely required by ASTM B564 for this grade but is performed on request; annealed UNS N10675 is very tough at and below room temperature because there is no ductile-to-brittle transition in the face-centred-cubic matrix. Always state on the purchase order whether you require testing on separately forged coupons or on prolongations from the part itself.
05 / Physical properties
Physical properties of Hastelloy B-3 / Alloy B-3 (density, thermal, magnetic)
Two figures on this table matter more than the rest for practical work. The density of 9.22 g/cm³ is roughly 18 % higher than austenitic stainless steel, so a forging that would weigh 1,000 kg in 316L weighs about 1,180 kg in UNS N10675. Budget accordingly, because nickel-alloy forgings are priced by weight. The thermal conductivity of about 10 W/m·K is roughly a quarter of carbon steel's, which is why Hastelloy B-3 tube sheets need heavier heat-transfer allowances and why welding heat input must be controlled tightly.
| Property | Value | Unit / note |
|---|---|---|
| Density | 9.22 | g/cm³ (0.333 lb/in³) |
| Melting range | 1370–1418 | °C (2500–2585 °F) |
| Modulus of elasticity | 216 | GPa (31.3 × 10⁶ psi) |
| Poisson's ratio | ≈ 0.32 | typical for annealed Ni-Mo |
| Coefficient of thermal expansion | 10.6 | µm/m·K (20–100 °C) |
| Thermal conductivity | ≈ 10.3 | W/m·K, calculated from published diffusivity, density and specific heat |
| Thermal diffusivity | 3.0 × 10⁻⁶ | m²/s |
| Specific heat | ≈ 373 | J/kg·K |
| Electrical resistivity | 1.37 | µΩ·m (137 µΩ·cm) |
| Magnetic permeability | ≈ 1.00 | essentially non-magnetic (austenitic FCC) |
| PREN | n/a | Pitting resistance equivalent number is meaningless below about 11 % Cr, so do not compare Alloy B-3 to stainless on PREN |
06 / Corrosion behaviour
Corrosion resistance of Hastelloy B-3: what it beats and what beats it
Hastelloy B-3 exists for one job: pure, reducing, non-oxidising acid service. In that envelope nothing else in the wrought-alloy catalogue matches it. Outside that envelope it is one of the worst choices you can make. The table below is the practical screening rule; the compatibility checker underneath applies it to your specific stream.
| Medium | Rating | Engineering note |
|---|---|---|
| Hydrochloric acid (HCl), all concentrations to boiling | Excellent | The defining application. Uncontaminated HCl only; see the oxidiser warning below. |
| Sulfuric acid (H₂SO₄), dilute to concentrated | Excellent | Including concentrations that attack zirconium equipment |
| Hydrobromic acid (HBr) | Excellent | Bromination process service |
| Phosphoric acid (H₃PO₄) | Excellent | Non-oxidising grades |
| Acetic, formic and other organic acids | Excellent | Acetic-acid and MMA reactor service |
| Hydrofluoric acid / fluoride-bearing media | Good | Withstands fluorides that damage zirconium |
| Chloride solutions (pitting, crevice, SCC) | Excellent | High Mo content gives outstanding resistance to chloride stress corrosion cracking |
| Sodium hydroxide and alkalis | Good | Adequate but rarely economic; cheaper alloys serve |
| Nitric acid (HNO₃) | Unsuitable | Rapid attack. Never use Alloy B-3. |
| Ferric (Fe³⁺) or cupric (Cu²⁺) salts | Unsuitable | Even trace contamination in HCl multiplies the corrosion rate |
| Wet chlorine, hypochlorite, chlorine dioxide | Unsuitable | Strongly oxidising |
| Aerated / oxygenated oxidising acids, aqua regia | Unsuitable | No protective Cr₂O₃ film can form at 1–3 % Cr |
| Persulphates, chromates, oxidising salt mixtures | Unsuitable | Use C-276, C-22 or Alloy 59 |
Field lesson worth the whole page. Most Hastelloy B-3 failures reported in service are not design errors in the acid. They are contamination events. Ferric ion leached from upstream carbon-steel piping, a nitric-acid passivation step never removed from the cleaning procedure, an air sparge added to a reactor years after commissioning, or oxygen ingress through a failed seal. Before specifying UNS N10675, confirm the full composition of the stream including trace metals, and confirm the cleaning and passivation chemicals used during turnaround. If the answer is "we're not sure", specify C-276 instead.
Hastelloy B-3 / Alloy B-3 corrosion compatibility checker
Describe your process fluid and get a first-pass verdict: is UNS N10675 the right alloy, or will it fail?
Choose your conditions above, then select Check compatibility.
First-pass screening only, based on published corrosion behaviour of UNS N10675. Final material selection must be made by a qualified corrosion engineer against your actual stream analysis, and where consequences are severe, against laboratory coupon or plant-loop testing. Jiangyin Jiangnan Metal Co., Ltd. provides this tool for guidance and accepts no liability for application decisions.
08 / Thermal stability
Service temperature limits and thermal stability of Hastelloy B-3 / Alloy B-3
For wet corrosion service, the practical and ASME code limit for UNS N10675 is 427 °C (800 °F). Strength is not what sets that figure; the alloy still carries 703 MPa at that temperature. The limit comes from corrosion behaviour combined with code allowable stresses.
The metallurgical constraint sits lower and lasts longer. Between roughly 550 °C and 750 °C, nickel-molybdenum alloys undergo long-range ordering: the disordered FCC matrix rearranges into Ni₄Mo and Ni₃Mo superlattices, and room-temperature ductility falls sharply. Resisting this is the entire point of the chromium and iron additions in Alloy B-3, and it is why B-3 can be welded and used as-welded where Alloy B-2 could not. But "resists" is not "immune". Prolonged exposure in the 550–750 °C band will still embrittle UNS N10675 eventually, so continuous service in that range is not a design condition. It is a fabrication transient to be passed through quickly.
Below 427 °C / 800 °F
Full design envelope for wet corrosion service. Covers essentially all hydrochloric-acid, sulfuric-acid and organic-acid process equipment. ASME Section VIII allowable stresses are published across this range.
427–550 °C
Above the wet-corrosion limit. Acceptable for short excursions and dry, oxygen-free service, but not for corrosion duty. Verify code allowables before designing here.
550–750 °C ordering band
Long-range ordering region. Transients such as welding and stress relief pass through it safely; continuous service does not. Expect progressive loss of room-temperature ductility over thousands of hours.
Above 750 °C
Hot-working and annealing territory only, in a controlled furnace. Solution annealing is performed at 1,066 °C followed by a water quench precisely to pass back down through Zone C fast enough to leave the matrix disordered.
Service temperature & thermal stability assessment
Enter your operating temperature, duration and environment to see whether UNS N10675 is inside its envelope.
Enter your conditions, then select Assess service envelope.
10 / Alloy selection
Hastelloy B-3 vs B-2, C-276, C-22, Alloy 59 and Inconel 625
The decision almost always comes down to one question: is the environment purely reducing, or does it swing oxidising? Purely reducing favours the B-series and its high molybdenum. Anything oxidising, or anything you cannot fully characterise, favours the C-series, where 16–23 % chromium buys tolerance at the cost of some reducing-acid performance.
| Property | Hastelloy B-3 | Alloy B-2 | C-276 | C-22 | Alloy 59 | Inconel 625 |
|---|---|---|---|---|---|---|
| UNS | N10675 | N10665 | N10276 | N06022 | N06059 | N06625 |
| W.Nr. | 2.4600 | 2.4617 | 2.4819 | 2.4602 | 2.4605 | 2.4856 |
| Nominal Ni | 65 | 69 | 57 | 56 | 59 | 61 |
| Nominal Cr | 1.5 | ≤1.0 | 16 | 22 | 23 | 21.5 |
| Nominal Mo | 28.5 | 28 | 16 | 13 | 16 | 9 |
| Density (g/cm³) | 9.22 | 9.22 | 8.89 | 8.69 | 8.60 | 8.44 |
| Reducing acids (HCl, H₂SO₄) | Best available | Best available | Good | Moderate | Good | Moderate |
| Oxidising media (HNO₃, Fe³⁺) | Unsuitable | Unsuitable | Good | Excellent | Excellent | Good |
| Thermal stability / as-welded use | Good | Poor | Good | Excellent | Excellent | Good |
| Chloride SCC resistance | Excellent | Excellent | Excellent | Excellent | Excellent | Good |
| Relative raw-material cost | ≈ 1.8 × | ≈ 1.8 × | 1.0 × (baseline) | ≈ 1.0 × | ≈ 1.1 × | ≈ 0.8 × |
| Forgeability | Narrow window | Narrow window | Moderate | Moderate | Moderate | Good |
| Specify it when… | Pure reducing acid, contamination controlled, new build | Matching existing B-2 plant only | Mixed or uncertain service | Strongly oxidising + chlorides | Most aggressive mixed service | High strength + general corrosion |
Cost multipliers are indicative raw-material ratios against C-276 and move with LME nickel and molybdenum-oxide pricing; they are not quotations. Forged-part price also depends on geometry, machining allowance, certification level and quantity. Ask us for the current index-linked position on your specific part.
Hastelloy B-3 or Hastelloy B-2? A short, blunt answer
For a new build, choose Hastelloy B-3. It offers the same hydrochloric-acid resistance as Alloy B-2 with far better thermal stability, it can normally go into service as-welded, and it is much less likely to crack during fabrication. The remaining reasons to buy B-2 are contractual: an existing approved-materials list, an operating spare that must match, or a specification that has not been revised in twenty years. Even then, ERNiMo-10 (B-3) filler is generally the better choice for repairing B-2 equipment, because the B-3 weld deposit is more ductile and more crack-resistant than a matching B-2 deposit would be.
Nickel alloy selector: is Alloy B-3 the right grade?
Answer three questions and get a recommended grade with the reasoning, plus what it costs you either way.
Answer the three questions, then select Recommend a grade.
12 / Product range
What Hastelloy B-3 / Alloy B-3 forged products can Jiangyin Jiangnan Metal supply?
Jiangyin Jiangnan Metal Co., Ltd. produces Hastelloy B-3 / Alloy B-3 (UNS N10675) parts by three routes, chosen by geometry. Open-die forging covers shafts, blocks, discs and heavy tube sheets. Seamless ring rolling produces rings and flange blanks, the most common route for reactor shell courses, manway rings and pressure-housing flanges. Upset forging handles short, large-cross-section hubs and valve bodies. Near-net-shape forging is worth specifying on this alloy more than on any steel: at roughly USD-per-kilogram levels typical of a 28 % molybdenum material, removing 30–40 % of the machining stock at the die is normally the largest single cost saving available on the part.
| Forged form | Size range | Specification | Typical application |
|---|---|---|---|
| Seamless rolled rings | 200–1,500 mm OD wall ≥ 25 mm | ASTM B564 | Reactor shell courses, manway rings, pressure housings |
| Forged flanges | DN 15 – DN 1200 | ASTM B564 / B462 to ASME B16.5, B16.47, EN 1092-1 | Acid piping, reactor nozzles, WN / SO / BL / LJ |
| Tube sheets & baffle plates | to Ø 1,200 mm thickness to 250 mm | ASTM B564 | Shell-and-tube heat exchangers, condensers, reboilers |
| Forged shafts | Ø 40–450 mm length to 4,000 mm | ASTM B564 / B335 | Agitator shafts, pump shafts, reactor stirrers |
| Forged discs, disks & hubs | to Ø 1,200 mm | ASTM B564 | Blind covers, closure heads, rotating discs |
| Round bar | Ø 25–450 mm | ASTM B335 | Machining stock, fastener stock, valve stems |
| Sleeves & bushings | Ø 60–900 mm | ASTM B564 | Pump wear sleeves, shaft protection, thermowell liners |
| Valve bodies, stems, seat rings | to 800 kg per piece | ASTM B564 / B462 | Ball, gate, globe, check and plug valves in acid service |
| Hollow forgings & trepanned billets | bore ≥ 100 mm | ASTM B564 | Pipe hollows, cylinders, saves 40–60 % input weight |
| Nozzles & reinforcing pads | DN 25 – DN 600 | ASTM B564 / B462 | Vessel penetrations, set-in and set-on nozzles |
| Blocks & blanks | to 2,500 kg | ASTM B564 | Customer machining stock |
| Custom near-net-shape forgings | to drawing | ASTM B564 | Any geometry; 30–40 % machining stock reduction typical |
- 1,500 mmMax ring OD
- 1,200 mmMax disc / tube sheet Ø
- 4,000 mmMax shaft length
- 2,500 kgMax single-piece weight
- Ø25–450Bar diameter, mm
- 10–14 wkTypical lead time
Hastelloy B-3 / Alloy B-3 forging weight calculator
Nickel-molybdenum forgings are priced by weight, and at 9.22 g/cm³ Hastelloy B-3 is 18 % heavier than stainless. Work out the number before you budget.
Calculated at 9.22 g/cm³. The net figure is the finished part; the billet estimate adds 30 % for machining stock, test prolongations and crop loss, which is typical for open-die nickel-alloy work. Complex geometries and heavy machining can push that to 60 % or more. Send the drawing and we will give you the real input weight.
14 / Manufacturing
Forging, heat treatment, welding and machining Hastelloy B-3 / Alloy B-3
Forging UNS N10675
Hastelloy B-3 is hot forged in a narrow window of roughly 900–1,175 °C, and it is markedly more sensitive to strain and strain rate than austenitic stainless steel. Practical consequences: reductions must be incremental rather than heavy single blows, the piece needs frequent reheating, and finishing below about 900 °C invites cracking. Because the alloy work-hardens fast and conducts heat poorly, surface and core temperatures diverge quickly in heavy sections, so soaking time matters more than it does on steel. The material must be re-annealed after all hot forming to restore corrosion resistance and ductility; a forging shipped in the as-forged condition will not meet the corrosion performance the alloy was bought for.
Solution annealing
Anneal at 1,066 °C (1,950 °F) followed by a water quench. Rapid air cooling is acceptable only for sections below about 10 mm. Hold time is typically 10–30 minutes at temperature depending on section thickness. The quench is not optional and it is not a hardening step. Its purpose is to carry the matrix down through the 550–750 °C ordering band faster than the ordered phases can nucleate. A slow furnace cool through that band produces a part that passes chemistry and tensile testing but has lost much of its room-temperature ductility. Use a fast heat-up, tight temperature control and rapid cooling; furnace charts are recorded and issued with the certificate.
Cold work rule. If any cold forming exceeds about 7 % outer-fibre strain, solution anneal before welding or putting the part into service. Above that threshold UNS N10675 becomes susceptible to cracking in and around the weld, and the cracking may not appear until the component has been in service for some time. This applies to cold straightening, roller-burnishing and cold sizing operations that are easy to leave off a routing sheet.
Welding
Hastelloy B-3 is welded with GTAW, GMAW, PAW and SMAW. Matching filler is AWS A5.14 ERNiMo-10 (bare) or AWS A5.11 ENiMo-10 (covered electrode). The rules that matter in practice:
- Stringer beads only, no weaving. Weaving raises heat input and time in the ordering band.
- Keep interpass temperature at or below 93 °C (200 °F).
- Back-purge every root pass with 100 % argon.
- Weld-start cracking is more likely than with the C-series alloys. Use run-on tabs, or grind every arc start back to sound metal.
- Do not use submerged arc welding on B-type alloys.
- Preheat is not required. Post-weld solution annealing is generally not required for Alloy B-3 in the way it was for B-2, which is the alloy's main fabrication advantage, but it is still specified for heavily restrained joints and for any assembly that saw more than 7 % cold work.
- ERNiMo-10 is also used to weld-overlay carbon-steel reactors for HCl duty, and to join Alloy B-3 to stainless steel, C-276 or Alloy 625.
Machining
Machine UNS N10675 as you would a work-hardening nickel alloy, not as you would stainless. Use sharp, rigid, positive-rake carbide tooling; maintain a heavy, uninterrupted feed so the tool cuts under the work-hardened layer rather than rubbing on it; never dwell or spring-pass; and flood with coolant. Typical turning speeds are roughly 15–25 m/min with coated carbide, an order slower than 316L. Rigidity of the setup matters more than the grade of insert. The alloy's low thermal conductivity keeps heat in the cutting zone, so tool life is sensitive to feed interruptions and to coolant delivery.
Anneal & welding parameter sheet generator
Enter the section thickness and get a printable solution-annealing and welding parameter sheet for your heat-treatment and welding vendors.
Enter your section thickness and condition, then select Generate parameter sheet.
16 / Manufacturing capability
Hastelloy B-3 production capability at Jiangyin Jiangnan Metal
Jiangyin Jiangnan Metal Co., Ltd. has operated as an open-die forging factory in Zhouzhuang Town, Jiangyin, Jiangsu since 2008, and exports to more than 40 countries. Nickel-alloy work such as UNS N10675 runs on the same presses and ring mills as our steel production but under separate routing: dedicated tooling contact surfaces to avoid iron pick-up, tighter furnace control, and a mandatory post-forge solution anneal and quench.
Process flow for a Hastelloy B-3 / Alloy B-3 forging
Billet
VIM + ESR billet to ASTM B335, heat number traced, chemistry verified on receipt by optical emission spectrometer.
Heat & forge
900–1,175 °C window, incremental reduction, frequent reheat. Ring rolling or open-die per geometry.
Solution anneal
1,066 °C soak, water quench. Chart-recorded, ±5 °C uniformity.
Rough machine
Descale and rough turn to leave UT-clean surfaces and stock for final machining.
NDT
Ultrasonic to ASTM A388 / EN 10228-3 / SEP 1921; liquid penetrant to ASTM E165 on machined surfaces.
Mechanical test
Tensile per ASTM E8, hardness, and corrosion or intergranular testing per ASTM G28 on request.
Final machine
Rough or finish machined to drawing, marked with heat number and specification.
Certify & ship
EN 10204 3.1 or 3.2, packed for sea freight, documents issued before dispatch.
Equipment and inspection
- Open-die forging hammers: 1 t, 3 t, 5 t and 9 t
- Hydraulic forging presses to 4,500 t
- Radial-axial seamless ring rolling mills, 3 m and 6 m
- Bogie-hearth and chamber furnaces with chart recording and ±5 °C uniformity
- Water quench tank sized for immediate transfer from the anneal furnace
- Optical emission spectrometer for full elemental verification
- Universal tensile testing machine, impact testing machine, hardness testers
- Ultrasonic flaw detection, magnetic particle equipment (steels), liquid penetrant line (nickel alloys)
- Metallographic microscope for grain size per ASTM E112 and microstructure verification
Magnetic particle inspection does not apply to UNS N10675, because the alloy is non-magnetic. Surface NDT on Hastelloy B-3 forgings is by liquid penetrant.
17 / Quality
Standards, testing and certification for Hastelloy B-3 / Alloy B-3 forgings
ASTM B564 / ASME SB-564
The primary specification for nickel-alloy forgings. ASTM B462 covers forged flanges and fittings for high-temperature service; ASTM B335 covers our incoming billet.
ASTM A388 · EN 10228-3 · SEP 1921
Ultrasonic examination. State the class or quality group on the purchase order, because acceptance criteria differ substantially between the three.
ASTM E165 / ISO 3452
Liquid penetrant testing on machined surfaces. Magnetic particle is not applicable to this non-magnetic alloy.
ASTM G28 · ASTM G48
Intergranular attack and pitting tests on request, used to verify that the anneal and quench were performed correctly.
ASME Section VIII Div 1
Constructed from SB-564 / SB-462 material with published allowable stresses to 427 °C. PED 2014/68/EU documentation available for European projects.
EN 10204 3.1 / 3.2
3.1 mill certificate as standard on every order. 3.2 third-party witnessed inspection through Lloyd's, DNV, BV, ABS, TÜV or SGS on request.
- ISO 9001:2015
- ASTM B564
- ASTM B462
- ASTM B335
- ASTM B333
- ASTM B366
- ASME SB-564
- ASME SB-462
- ASME Sec. VIII Div 1
- EN 10204 3.1
- EN 10204 3.2
- EN 10228-3
- SEP 1921
- ASTM A388
- ASTM E165
- ASTM E8
- ASTM E112
- ASTM G28
- NACE MR0175 / ISO 15156
- PED 2014/68/EU
What appears on our material test certificate
Heat number and melt route; full chemical analysis against ASTM B564 limits; solution-annealing temperature, soak time and quench medium with furnace chart reference; room-temperature tensile results; hardness; ultrasonic and penetrant reports with the acceptance standard and class stated; dimensional report; and a statement of every equivalent designation the heat satisfies (UNS N10675, W.Nr. 2.4600, ASTM B564, ASME SB-564). Certificates are issued before dispatch and retained for ten years.
18 / Procurement
How to specify a Hastelloy B-3 / Alloy B-3 forging order
Six lines on a purchase order remove almost all of the ambiguity that causes requotes and rejected material on this grade.
- Designation. Write UNS N10675 plus the ASTM product specification (B564 for forgings, B462 for flanges and fittings, B335 for bar). Adding "Hastelloy B-3" or "Alloy B-3" as a cross-reference is fine and we quote against either. What you must not write is "Hastelloy B" on its own: it is ambiguous between three different alloys.
- Supply condition. "Solution annealed at 1,066 °C and water quenched" should be stated explicitly, because as-forged material will pass a tensile test and still fail in service.
- Drawing. 2D drawing or 3D model with tolerances, surface finish, and machining allowance. State whether you want rough-machined or finish-machined delivery.
- NDT. Ultrasonic standard and class, for example "UT per EN 10228-3 quality class 3" or "UT per ASTM A388, acceptance per purchaser specification". Add liquid penetrant per ASTM E165 for machined sealing surfaces.
- Certification. EN 10204 3.1 or 3.2. If 3.2, name the inspection body so we can schedule the witness points.
- Service data. Tell us the actual medium, concentration, temperature and any oxidising contaminants. If the service is genuinely wrong for UNS N10675 we would rather tell you before you buy it.
Drawing callout template
MATERIAL: UNS N10675 / W.Nr. 2.4600, forging per ASTM B564 (ASME SB-564 where code construction applies) CONDITION: Solution annealed 1066 °C (1950 °F), water quenched NDT: UT per EN 10228-3 quality class 3 PT per ASTM E165 on all machined sealing faces TESTING: Tensile per ASTM E8; ASTM G28 Method A on request CERT: EN 10204 3.1 (3.2 with third-party witness if specified) MARKING: Heat number + UNS N10675 + drawing no., low-stress stamp or vibro-etch on a non-functional surface NOTE: Material shall not contact oxidising media, ferric or cupric ions, or nitric-acid passivation chemicals.
Hastelloy B-3 / Alloy B-3 RFQ text generator
Fill in what you know and get a complete, professional enquiry you can paste into an email, carrying every field we need in order to quote without coming back to you.
20 / Applications
Where Hastelloy B-3 / Alloy B-3 forgings are used
Hastelloy B-3 is a chemical-process alloy first and everything else second. The applications below are the ones that recur in our order book for UNS N10675.
Hydrochloric acid plant
HCl absorption, synthesis and recovery units: reactor shell-course rings, nozzle forgings, manway rings and flanges. This is the single largest application of the alloy worldwide.
Acetic acid & MMA reactors
Reactor internals, agitator shafts and flanges. Alloy B-3's ability to be used as-welded is what makes complex reactor fabrication practical in this grade.
Shell-and-tube exchangers
Forged tube sheets, baffle plates and channel flanges for acid coolers, condensers and reboilers, up to 1,200 mm diameter and 250 mm thick.
API and fine-chemical plant
Concentrated reducing acids with zero tolerance for metallic contamination of the product. Agitator shafts, sleeves, valve components and nozzles.
Pumps and agitators
Pump shafts, wear sleeves, impeller hubs and casing rings for acid transfer duty, where chloride stress corrosion cracking would destroy stainless.
Valves for acid service
Forged valve bodies, stems, seat rings and plugs for ball, gate, globe, check and plug valves handling HCl, H₂SO₄ and HBr.
Pickling and regeneration lines
Steel-mill acid regeneration plant: piping flanges, spray-roaster components and pump parts, provided the liquor is kept free of ferric ion at the point of contact.
Vacuum furnace hardware
In oxygen-free or vacuum atmospheres Alloy B-3 retains useful strength well above its wet-corrosion limit, making it a candidate for furnace fixtures and retorts.
21 / Avoid these
Eight mistakes engineers make when ordering Hastelloy B-3
- Writing "Hastelloy B" on the drawing without the grade suffix. That name spans Alloy B (N10001), B-2 (N10665) and B-3 (N10675), three alloys with different weldability. "Hastelloy B-3" and "Alloy B-3" are both unambiguous and both acceptable to us, but the safest callout is UNS N10675.
- Not disclosing oxidising contaminants. A stream described as "20 % HCl" that actually carries 300 ppm ferric ion is a different corrosion problem entirely. Give us the full analysis.
- Forgetting the nitric-acid passivation step. Many plants passivate stainless equipment with nitric acid during turnaround. If that procedure touches your Alloy B-3 parts, they will be attacked. Write the exclusion onto the drawing.
- Omitting the solution anneal from the purchase order. Without it, you may receive as-forged material that meets tensile requirements and has no useful corrosion resistance.
- Specifying UT without a class. "UT per EN 10228-3" allows four quality classes with very different acceptance criteria. State the class, or you will get the loosest one.
- Specifying magnetic particle inspection. UNS N10675 is non-magnetic; MT is impossible. Use liquid penetrant per ASTM E165.
- Cold straightening after annealing without re-annealing. More than about 7 % strain, and the part must be re-annealed before welding or service, or it will crack.
- Buying Alloy B-3 when C-276 would do. Hastelloy B-3 costs roughly 1.8× C-276 because of its molybdenum content. If the service is not purely reducing, you are paying a premium for worse performance.
22 / FAQ
Frequently asked questions about Hastelloy B-3 / Alloy B-3 (UNS N10675)
What is Hastelloy B-3 / Alloy B-3?
Hastelloy B-3, also written Alloy B-3, is a nickel-molybdenum alloy designated UNS N10675 and W.Nr. 2.4600, containing a minimum of 65 % nickel and 27–32 % molybdenum with small chromium and iron additions. It is used for equipment handling hydrochloric acid and other reducing acids at all concentrations and temperatures. Jiangyin Jiangnan Metal Co., Ltd. produces Hastelloy B-3 / Alloy B-3 open-die forgings, seamless rolled rings, flanges, tube sheets and shafts to ASTM B564 and ASTM B335.
Is Hastelloy B-3 the same as Alloy B-3, UNS N10675 and W.Nr. 2.4600?
Yes. All four names describe one and the same nickel-molybdenum chemistry, and they are used interchangeably throughout this page. HASTELLOY® and B-3® are registered trademarks of Haynes International, Inc.; material melted and sold by Haynes under those brand names is theirs. Material forged independently by Jiangyin Jiangnan Metal Co., Ltd. is the same generic chemistry and is certified as UNS N10675 / W.Nr. 2.4600 / ASTM B564; it is not sold under the Haynes trademark. We are not affiliated with, sponsored by or endorsed by Haynes International, Inc.
Should I write Hastelloy B-3 or Alloy B-3 on the purchase order?
Write UNS N10675 plus the ASTM product specification, and add either trade name after it as a cross-reference if your drawing office prefers one. Hastelloy B-3 and Alloy B-3 identify exactly the same alloy and we quote against either, but only the UNS number plus the ASTM specification is contractually unambiguous. A line reading “UNS N10675 forging to ASTM B564, solution annealed 1066 °C and water quenched, EN 10204 3.1” cannot be misread. “Hastelloy B” written on its own can mean three different alloys and is the most common cause of requotes in this family.
What is the difference between Hastelloy B-3 and Hastelloy B-2?
Hastelloy B-3 (UNS N10675) and Hastelloy B-2 (UNS N10665) offer the same resistance to hydrochloric acid, but B-3 has far better thermal stability. Alloy B-2 forms brittle ordered Ni₄Mo and Ni₃Mo phases rapidly when held between roughly 550 and 750 °C, so B-2 welds and heat-affected zones often crack and need re-solution annealing. The controlled chromium and iron additions in Alloy B-3 slow that ordering reaction, so B-3 can normally be used in the as-welded condition and is easier to fabricate. B-3 is the preferred choice for new equipment; B-3 filler is also used to repair B-2 equipment.
What is the chemical composition of Hastelloy B-3 / Alloy B-3 (UNS N10675)?
Per ASTM B564 / B335: nickel 65.0 % minimum, molybdenum 27.0–32.0 %, chromium 1.0–3.0 %, iron 1.0–3.0 %, cobalt 3.0 % max, tungsten 3.0 % max, manganese 3.0 % max, aluminium 0.50 % max, titanium 0.20 % max, vanadium 0.20 % max, silicon 0.10 % max, carbon 0.01 % max, phosphorus 0.030 % max, sulphur 0.010 % max.
Can Hastelloy B-3 be used in nitric acid or ferric chloride?
No. Alloy B-3 contains only 1–3 % chromium and has essentially no resistance to oxidising media. Nitric acid, ferric (Fe³⁺) and cupric (Cu²⁺) salts, hypochlorite, wet chlorine and aerated oxidising acids attack it rapidly. Even trace ferric or cupric contamination in a hydrochloric acid stream can raise corrosion rates by an order of magnitude. For mixed oxidising and reducing service use Hastelloy C-276 (UNS N10276), C-22 (UNS N06022) or Alloy 59 (UNS N06059) instead.
What is the density of Hastelloy B-3 / Alloy B-3?
The density of Hastelloy B-3 / Alloy B-3 (UNS N10675) is approximately 9.22 g/cm³ (0.333 lb/in³) at room temperature. Use this figure to convert forged part volume into billet weight when preparing an RFQ, or use the weight calculator on this page.
What is the maximum service temperature of Hastelloy B-3?
For wet corrosion service the practical and ASME code limit is about 427 °C (800 °F). In dry, oxygen-free or vacuum environments Alloy B-3 retains useful strength considerably higher, but prolonged exposure between roughly 550 and 750 °C will still cause long-range ordering and a loss of room-temperature ductility.
What heat treatment is applied to Hastelloy B-3 / Alloy B-3 forgings?
Hastelloy B-3 forgings are solution annealed at 1,066 °C (1,950 °F) and water quenched. Rapid air cooling is acceptable only for sections under about 10 mm. Hold time is typically 10–30 minutes depending on section thickness. Re-annealing is required after all hot forming, and after any cold forming that exceeds about 7 % outer-fibre strain.
Which filler metal is used to weld Hastelloy B-3 / Alloy B-3?
Matching filler is AWS A5.14 ERNiMo-10 for GTAW, GMAW and PAW, and AWS A5.11 ENiMo-10 for SMAW coated electrodes. Weld with stringer beads only, keep interpass temperature at or below 93 °C (200 °F), back-purge root passes with argon, and do not use submerged arc welding on B-type alloys.
Which standards apply to Hastelloy B-3 / Alloy B-3 forgings?
ASTM B564 and ASTM B462 cover forgings and forged flanges/fittings; ASTM B335 covers billet, rod and bar; ASTM B333 covers plate, sheet and strip; ASTM B366 covers wrought fittings; ASTM B622, B619 and B626 cover pipe and tube. The ASME equivalents are SB-564, SB-462, SB-335, SB-333 and SB-622 for Section VIII construction. Ultrasonic testing is normally to ASTM A388, EN 10228-3 or SEP 1921, with certification to EN 10204 3.1 or 3.2.
What is the largest Hastelloy B-3 forging you can make?
Jiangyin Jiangnan Metal Co., Ltd. produces Alloy B-3 seamless rolled rings up to 1,500 mm outside diameter, forged discs and tube sheets up to 1,200 mm diameter, shafts up to 4,000 mm length, round bar from 25 to 450 mm diameter, and single-piece forgings up to approximately 2,500 kg. Nickel-molybdenum alloys have a narrower hot-working window than steel, so maximum sizes are smaller than our carbon and stainless steel capability.
What is the lead time for Hastelloy B-3 / Alloy B-3 forgings?
Typical lead time is 10–14 weeks from order confirmation for standard Hastelloy B-3 rings, flanges and shafts with EN 10204 3.1 certification. Add roughly 2–3 weeks for EN 10204 3.2 third-party witnessed inspection, and allow longer for large tube sheets or heavy single pieces. Billet availability drives the schedule more than forging capacity, because UNS N10675 is produced in small heats.
How much do Hastelloy B-3 / Alloy B-3 forgings cost per kg?
Hastelloy B-3 / Alloy B-3 (UNS N10675) forgings from Jiangyin Jiangnan Metal Co., Ltd. run roughly USD 40 to USD 80 per kilogram ex-works, solution annealed and water quenched with EN 10204 3.1 certification. Simple round bar and small rings sit at the lower end of that range; large-diameter rolled rings, thick tube sheets and low-quantity machined parts sit at the upper end. Because Alloy B-3 pricing tracks LME nickel and molybdenum oxide, the firm price is confirmed at the time of quotation against your drawing, finished weight and order quantity. Near-net shape forging is the largest single saving available, since removing 30 to 40 % of the machining stock at the die reduces the billet weight you pay for.
Why is Hastelloy B-3 more expensive than Hastelloy C-276?
Alloy B-3 contains roughly 28.5 % molybdenum against about 16 % in C-276, and molybdenum costs several times more than nickel per kilogram. Hastelloy B-3 is also melted in smaller heats. Specify B-3 only where the service is genuinely reducing and free of oxidising contamination; where both oxidising and reducing conditions occur, C-276 costs less and performs better.
Is Hastelloy B-3 / Alloy B-3 approved for sour service under NACE MR0175 / ISO 15156?
UNS N10675 is a solid-solution nickel alloy and resists chloride stress corrosion cracking, and nickel-molybdenum alloys are addressed in NACE MR0175 / ISO 15156-3. Acceptance always depends on the specific H₂S partial pressure, chloride level, pH and temperature of your service envelope, and on hardness and cold-work limits. Send us the service conditions and required standard revision and we will confirm compliance in writing before order confirmation.
23 / Glossary
Glossary of Hastelloy B-3 / Alloy B-3 terms
- UNS N10675
- Unified Numbering System designation for the nickel-molybdenum alloy commonly called Hastelloy B-3 or Alloy B-3. The correct designation to use on drawings and purchase orders.
- W.Nr. 2.4600
- European material number for the same chemistry, also written NiMo29Cr.
- Hastelloy® B-3®
- Registered trademarks of Haynes International, Inc., and the brand name under which this alloy was developed. Used on this page as a descriptive name for the UNS N10675 chemistry. Generic equivalent supplied by us: UNS N10675 / W.Nr. 2.4600 / ASTM B564.
- Alloy B-3
- The generic, trademark-free name for exactly the same nickel-molybdenum chemistry as Hastelloy B-3. Alloy B-3, Hastelloy B-3, UNS N10675 and W.Nr. 2.4600 all describe one material; only the UNS number and the ASTM specification are contractually unambiguous.
- Long-range ordering
- Rearrangement of the disordered face-centred-cubic Ni-Mo matrix into ordered Ni₄Mo and Ni₃Mo superlattices between roughly 550 and 750 °C, causing loss of room-temperature ductility. Resisting it is the reason Hastelloy B-3 exists.
- Reducing acid
- An acid environment with no significant oxidising agent: hydrochloric, sulfuric, phosphoric, acetic and formic acids in deaerated, uncontaminated form. The service Alloy B-3 is designed for.
- Oxidising contamination
- Ferric (Fe³⁺) or cupric (Cu²⁺) ions, dissolved oxygen, nitric acid residue, hypochlorite or chlorine. The most common cause of unexpected Alloy B-3 corrosion in service.
- Solution annealing
- Heating to 1,066 °C and quenching in water to dissolve secondary phases and leave the matrix disordered. Mandatory after hot forming and after cold work above about 7 %.
- ERNiMo-10 / ENiMo-10
- AWS A5.14 bare filler and AWS A5.11 covered electrode matching UNS N10675.
- ASTM B564
- Standard specification for nickel-alloy forgings; the primary specification for Hastelloy B-3 / Alloy B-3 forged products. ASME equivalent: SB-564.
- EN 10204 3.1 / 3.2
- Inspection document types. 3.1 is issued by the manufacturer's own authorised inspection representative; 3.2 is countersigned by an independent third party.
- EN 10228-3
- European standard for ultrasonic testing of austenitic and austenitic-ferritic steel forgings, applied by extension to nickel-alloy forgings. Four quality classes, so always state which.
- PREN
- Pitting resistance equivalent number, calculated from Cr, Mo and N content. Not a meaningful metric for Alloy B-3, whose corrosion resistance does not come from a chromium-oxide film.
24 / Sources
Technical references
Chemistry, mechanical, physical and fabrication data on this page are drawn from the published standards and engineering references below. Test results on our own material test certificates are independent and traceable to calibrated equipment in our laboratory.
- ASTM B564/B564M, Standard Specification for Nickel Alloy Forgings, ASTM International, West Conshohocken, PA.
- ASTM B335/B335M, Standard Specification for Nickel-Molybdenum Alloy Rod, ASTM International.
- ASTM B462, Standard Specification for Forged or Rolled UNS N06030, N06022 … and UNS N10675 Alloy Pipe Flanges, Forged Fittings, and Valves and Parts for Corrosive High-Temperature Service, ASTM International.
- ASTM B333/B333M, Standard Specification for Nickel-Molybdenum Alloy Plate, Sheet, and Strip, ASTM International.
- ASTM B622, Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube, ASTM International.
- ASME Boiler and Pressure Vessel Code, Section II Part B and Section VIII Division 1, latest edition, American Society of Mechanical Engineers.
- AWS A5.14/A5.14M, Specification for Nickel and Nickel-Alloy Bare Welding Electrodes and Rods (ERNiMo-10), American Welding Society.
- AWS A5.11/A5.11M, Specification for Nickel and Nickel-Alloy Welding Electrodes for Shielded Metal Arc Welding (ENiMo-10), American Welding Society.
- DIN 17750, Nickel and nickel alloy plate, sheet and strip — Technical delivery conditions, Deutsches Institut für Normung.
- EN 10204:2004, Metallic products — Types of inspection documents, CEN, Brussels.
- EN 10228-3, Non-destructive testing of steel forgings — Part 3: Ultrasonic testing of ferritic or martensitic steel forgings, CEN.
- SEP 1921, Ultrasonic testing of steel forgings, Stahl-Eisen-Prüfblatt, Verein Deutscher Eisenhüttenleute.
- ASTM A388/A388M, Standard Practice for Ultrasonic Examination of Steel Forgings, ASTM International.
- ASTM G28, Standard Test Methods for Detecting Susceptibility to Intergranular Attack in Wrought, Nickel-Rich, Chromium-Bearing Alloys, ASTM International.
- NACE MR0175 / ISO 15156-3, Petroleum and natural gas industries — Materials for use in H₂S-containing environments — Part 3: Cracking-resistant CRAs and other alloys, ISO.
- ASM Handbook, Volume 13B: Corrosion: Materials, ASM International, Materials Park, OH, chapters on nickel and nickel alloys.
- ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys, J.R. Davis (ed.), ASM International, 2000.
- Haynes International, HASTELLOY® B-3® alloy principal features and technical data, haynesintl.com.
Standards cited are the revisions current at the time of the last page review. For procurement, always reference the revision in force at the contract date. All trademarks are the property of their respective owners.
Request a Hastelloy B-3 / Alloy B-3 (UNS N10675) quotation
Send a drawing or a size list and the service conditions. We reply within 24 hours with price, lead time and confirmation of the applicable ASTM and ASME specifications. If UNS N10675 is the wrong alloy for your service, we will say so and tell you what to specify instead. That conversation costs nothing and saves a great deal.
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Open-Die Forging Factory
Jiangyin City, Jiangsu Province, China