Nickel-chromium-molybdenum-tungsten alloy · Open-die forgings

NiCr21Mo14W Forgings W.Nr. 2.4602 · UNS N06022 · Alloy 22

• UNS N06022
• W.Nr. 2.4602
• NiCr21Mo14W
• ISO NiCr21Mo14W3
• NW6022
• Alloy 22
• ASTM B564 / B462 / B574
• ASTM A494 CX2MW (cast)

Published 18 May 2016 · Last updated 23 August 2026 · Reviewed by the Jiangyin Jiangnan Metal metallurgical engineering team

Short answer

What NiCr21Mo14W forged products can you buy?

Jiangyin Jiangnan Metal produces UNS N06022 by three routes, chosen by geometry and order size. Open-die forging covers shafts, blocks, heavy discs and tube sheets. Seamless ring rolling produces rings from 200 mm to 2,500 mm outside diameter and is the usual route for pressure-vessel shell courses, scrubber flanges and pump and valve housings. Upset forging handles short, large-section hubs, stub flanges and blind flanges. Near-net dies matter more in this alloy than in steel: raw material runs roughly twenty times the cost per kilogram of carbon steel, so every kilogram turned into swarf is expensive.

• Seamless rolled rings
• Forged flanges (WN, SO, blind, spectacle)
• Forged discs & blanks
• Forged shafts & spindles
• Sleeves & bushings
• Tube sheets
• Valve bodies, stems & seat rings
• Forged nozzles & hubs
• Round, flat & square bar
• Trepanned hollow bar
• Forged blocks
• Custom near-net forgings to drawing

What is NiCr21Mo14W / UNS N06022?

NiCr21Mo14W is a fully austenitic, solid-solution strengthened nickel alloy developed in the mid-1980s to fix a specific problem with the earlier C-family alloys. C-276 performs very well in reducing acids but its 16% chromium leaves it exposed in oxidizing service; C-4 is thermally stable but weaker against localised attack. N06022 raises chromium to roughly 21.5% while keeping 13.5% molybdenum and adding 3% tungsten, so the same heat handles both ends of the redox scale.

Three things matter in service:

• It works on both sides of the redox line. Chromium builds the passive film that survives nitric acid, ferric and cupric chlorides, wet chlorine and hypochlorite. Molybdenum and tungsten carry the load in reducing media such as dilute sulphuric and hydrochloric acid. Process streams that swing between the two, or contain both at once, are exactly where single-mechanism alloys fail.
• Very high resistance to localised attack. With PREN around 71, N06022 shows no pitting or crevice attack in the standard ASTM G48 ferric chloride tests up to boiling, and it resists chloride stress-corrosion cracking that destroys austenitic stainless steels.
• Thermal stability in the weld heat-affected zone. Carbon at 0.015% maximum and silicon at 0.08% maximum were set deliberately low to suppress grain-boundary carbide and intermetallic precipitation. This is why N06022 is normally used as welded, without post-weld solution annealing, in fabricated vessels and scrubber linings.

What are the equivalents of NiCr21Mo14W? (2.4602, N06022, Alloy 22)

Buyers meet this alloy under at least eight names. All of the designations below describe the same 21Cr-13.5Mo-3W-Ni chemistry, and we accept purchase orders under any of them. The generic designations, UNS N06022 and W.Nr. 2.4602, are what belongs on a drawing.

Standards are cited by number. Always reference the revision in force at the contract date.

What is the chemical composition of NiCr21Mo14W?

The band below is the ASTM B564 / B574 / B575 requirement for UNS N06022, and it is what we buy raw material against unless a drawing calls for something tighter. The band works as a system. Chromium and molybdenum are the two corrosion elements and they pull in opposite directions, tungsten reinforces molybdenum, and the low carbon and silicon ceilings are there to keep intermetallics out of the grain boundaries.

Some published tables list a phosphorus maximum of 0.025% following the European mill practice. We procure to 0.02% max unless the order states otherwise. The alloy may contain additional elements at trace level for technical reasons.

What are the mechanical properties of NiCr21Mo14W?

There is only one condition to quote, because there is only one heat treatment: solution annealed and rapidly quenched. The figures below are the ASTM B564 / ASME SB-564 acceptance minima for forged product. Bar to ASTM B574 and plate to ASTM B575 carry the same room-temperature minima.

Confirm against the revision of ASTM B564 in force at your contract date.

Typical production values

Minima are what a certificate must beat; a correctly annealed heat sits well above them. The values below are representative of what we expect on a test coupon from N06022 forged product.

What are the physical properties of NiCr21Mo14W?

Values are representative published data for the alloy and are given for design guidance. Where a physical property is contractual, state it on the purchase order so it is measured and reported.

How corrosion resistant is NiCr21Mo14W?

Corrosion resistance is why this grade gets bought, so this section runs longer than the rest. N06022 is among the broadest-spectrum corrosion-resistant wrought alloys in commercial production. It rarely tops the table in any single acid. What it has is no weak side, and on a plant with a variable feed that counts for more.

Pitting and crevice resistance

The pitting resistance equivalent number is calculated as PREN = %Cr + 3.3 × (%Mo + 0.5 × %W). At mid-range chemistry (21.5 Cr, 13.5 Mo, 3.0 W) that gives approximately 71, against roughly 25 for Type 316L and 43 for super duplex 2507. In ASTM G48 Method C and D ferric chloride testing, N06022 shows no pitting or crevice attack up to the boiling point of the test solution, which is why it is specified for scrubber internals and seawater-cooled heat exchangers where duplex grades pit.

Intergranular attack and the ASTM G28 test

The standard acceptance test for this family is ASTM G28 Method A, a 24-hour boiling ferric sulphate / 50% sulphuric acid immersion that reveals grain-boundary precipitation. Correctly annealed and quenched N06022 gives a low, uniform corrosion rate with no grain dropping. A part that has been slow cooled through 600-1000 °C, or aged in service, will fail it. Where intergranular attack is a project concern, put "ASTM G28 Method A, rate to be reported, no intergranular attack permitted" on the purchase order and we run it on production coupons.

NiCr21Mo14W vs C-276, 625, 59 and 316L: which do you need?

This is the most common technical question we get on this grade. In short: N06022 is the all-rounder. C-276 is the reducing-acid specialist. 625 is the one with strength and high-temperature capability. If 316L will survive the fluid, use 316L.

PREN figures are calculated at mid-range chemistry using Cr + 3.3(Mo + 0.5W). Cost multiples are indicative material ratios against 316L bar, not quoted prices, and move with the nickel and molybdenum markets.

Three questions that usually settle it

1. Does the stream ever turn oxidizing? Ferric ions, hypochlorite, nitric, aeration, chlorine dioxide, or an oxidizing upset condition. If yes, N06022 beats C-276 and the decision is made.
2. Is it hot concentrated hydrochloric or reducing sulphuric with no oxidizer at all? Then C-276 or B-3 is the better buy, and N06022 is being over-specified.
3. Do you need yield strength above 310 MPa or service above 600 °C? Then N06022 is the wrong family. Move to 625, 718 or 725 and check the corrosion trade-off.

How is NiCr21Mo14W heat treated?

There is one heat treatment for this alloy, and it is not optional.

1. Solution anneal at 1104-1177 °C (2020-2150 °F), commonly 1121 °C (2050 °F). Hold roughly 30 minutes per 25 mm of section, 30 minutes minimum, measured from when the part reaches temperature. This dissolves M₆C carbides, mu phase and P phase back into the matrix and recrystallises the forged structure.
2. Quench rapidly, in water for anything over about 25 mm section. The quench is not there to harden anything. Its job is to clear the 1000-600 °C precipitation window fast enough that nothing forms on the grain boundaries. Air cooling a heavy section is a common and expensive mistake.

Descaling after annealing

The oxide formed at 1121 °C is tenacious and chromium depleted underneath. Grit blast, then pickle in a nitric-hydrofluoric bath, and rinse thoroughly. Leaving scale on a corrosion-resistant alloy defeats the purpose of buying it: the chromium-depleted layer beneath the scale is the first thing the process fluid attacks.

Re-heat treatment

Parts recovered from service, or from a suspect thermal history, can be re-solution annealed and re-quenched without penalty, provided section thickness still allows a fast quench. Run an ASTM G28 Method A coupon afterwards to confirm the structure has been reset.

How is NiCr21Mo14W forged, welded and machined?

Forging

N06022 is a stiff alloy to work. Hot flow stress is several times that of carbon steel at the same temperature and the working window is narrow, so press capacity and reheat discipline matter more than they do on steel.

• Soak and forge at 1177-1204 °C (2150-2200 °F), finishing above roughly 955 °C (1750 °F). Below that the alloy work-hardens quickly and surface cracking risk rises sharply.
• Reheat frequently. With thermal conductivity around one third of steel, the surface of a heavy billet cools far ahead of the core. Light, frequent passes with reheats beat heavy passes.
• Target at least 4:1 reduction from the ESR ingot to break down the cast structure and develop grain flow along the principal stress direction.
• Solution anneal and water quench after forging, always. Hot work leaves a mixed, partly recrystallised structure with precipitate on the boundaries. This is the step that makes the part corrosion resistant.
• Keep sulphur low and tooling clean. Sulphur causes hot shortness; residual sulphur from dies, lubricants or fuel can embrittle the surface.

Production route for NiCr21Mo14W open-die forgings and rolled rings at Jiangyin Jiangnan Metal Co., Ltd.

Welding

The alloy welds well, which is a large part of why it dominates scrubber fabrication. GTAW, GMAW, SMAW and plasma processes all apply. No preheat is required and no post-weld heat treatment is normally required. The low carbon and silicon keep the heat-affected zone stable, so fabricated equipment goes into service as welded.

• Use a matching filler: ERNiCrMo-10 wire (AWS A5.14) or ENiCrMo-10 electrode (AWS A5.11) for N06022.
• Keep interpass temperature below about 100 °C and heat input low. Stringer beads, no weaving beyond about three electrode diameters.
• Clean rigorously between passes. Nickel alloys are intolerant of sulphur, lead, zinc, grease and marker ink; all cause hot cracking.
• Where the weld will see the most aggressive part of the duty, consider over-alloying with an ERNiCrMo-13 (Alloy 59) filler to compensate for the molybdenum segregation that occurs in the as-cast weld metal.

Machining

Treat N06022 as a work-hardening, low-conductivity, gummy alloy, closer to austenitic stainless at its worst than to steel. Three rules cover most of it: rigid setup, positive rake, and never let the tool dwell. A rubbing edge work-hardens the surface immediately and the next pass then cuts into a hardened layer.

• Run slow surface speeds and heavy feeds. Light feeds ride on the work-hardened skin.
• Flood coolant, high concentration, aimed at the cutting edge. The alloy carries almost no heat away from the tool itself.
• Take a depth of cut that stays below the previous work-hardened layer, typically 2 mm or more on roughing.
• Sharp, positive-rake coated carbide for turning; cobalt HSS still competitive on drilling and tapping.
• Allow 3-6 mm machining stock on forgings; more on profiled geometries.

How does NiCr21Mo14W fail, and how do you prevent it?

What can Jiangyin Jiangnan Metal forge in NiCr21Mo14W?

UNS N06022 is a made-to-order grade for us: the heat is melted against your specification rather than pulled from stock, which is why the drawing, the standard and the quantity all matter at enquiry stage. The envelopes below are our tested limits for this alloy on our equipment.

The company employs 460 people including 9 senior and 32 intermediate engineers. Alongside NiCr21Mo14W we forge the full corrosion-resistant nickel alloy range: C-276, 625, 825, 59, Monel 400, plus carbon, alloy and tool steels, the precipitation-hardening stainless family and duplex grades.

Which standards and certificates apply to NiCr21Mo14W?

Quality management is certified to ISO 9001:2015. Third-party witness certificates are issued through the inspection body you nominate: Lloyd's Register, DNV, Bureau Veritas, ABS, TÜV or SGS. Customers keep an unrestricted right to witness any production stage, including chemistry, forging, heat treatment, quenching and mechanical testing.

How do you specify a NiCr21Mo14W forging order?

1. Name the material generically. Write UNS N06022 / W.Nr. 2.4602 / NiCr21Mo14W. A purchase order that only says "Hastelloy C-22" names a Haynes trademark and can strictly only be filled by that mill.
2. State the product standard. ASTM B564 for forgings, B462 for flanges and fittings, B574 for bar. They are different specifications with different test requirements.
3. Say "solution annealed and rapidly quenched". There is no other valid condition. If the quench medium matters to you, name it.
4. Define the corrosion test. ASTM G28 Method A with a reported rate is one of the most useful lines you can add to a nickel alloy purchase order. It proves the anneal was done correctly.
5. Define NDE and acceptance class. "UT per EN 10228-3, quality class 3" or "UT per ASTM A388 with acceptance to the purchase order". An unqualified "ultrasonic test" is not a specification.
6. Add any element caps beyond the standard. Cobalt for nuclear service, tighter phosphorus or sulphur, or a maximum ferrite-forming residual. These must be known before the heat is melted, not after.
7. Choose the certificate. EN 10204 3.1 as standard; 3.2 with a named witness where the project demands it.
8. Give quantity, date, Incoterm and destination. Below roughly 500 kg we consolidate onto a larger heat, which affects both price and lead time.

Drawing callout you can copy

MATERIAL:      UNS N06022 / W.Nr. 2.4602 / NiCr21Mo14W
               ASTM B564 (forgings), or B462 for flanges/fittings, B574 for bar
MELT ROUTE:    EAF + AOD/VOD + ESR, single heat, heat number traceable
CONDITION:     Solution annealed 1121 °C ±14 °C, minimum 30 min per 25 mm,
               water quenched; no intermediate stress relief permitted
CHEMISTRY:     Report all specified elements INCLUDING tungsten 2.5-3.5%
               Cobalt 0.20% max [state only if nuclear/radiological service]
TENSILE:       690 MPa UTS min, 310 MPa YS 0.2% min, 45% elongation min
CORROSION:     ASTM G28 Method A, 24 h, rate to be reported,
               no intergranular attack permitted
NDE:           UT per EN 10228-3 quality class 3 (or ASTM A388)
               PT per ASTM E165, Type I Method C. MT does not apply,
               material is non-magnetic
SURFACE:       Fully descaled, pickled HNO3/HF, free of oxide and embedded iron
CERTIFICATE:   EN 10204 3.1 (3.2 with third-party witness if stated on the PO)
MARKING:       Heat number, UNS number and drawing number, low-stress stamped
              [or vibro-etched where stamping is not permitted]

Eight mistakes buyers make with NiCr21Mo14W

1. Asking for solution treatment plus ageing. The alloy has no ageing response. Ageing it precipitates mu phase and ruins the corrosion resistance.
2. Accepting a certificate with no tungsten reported. W is a specified 2.5-3.5% element. Its absence from the report means the chemistry was not fully verified.
3. Specifying a post-weld stress relief. There is no valid low-temperature stress relief for N06022. The only route is a full re-anneal and re-quench.
4. Choosing N06022 for hot concentrated HCl. That is C-276 or B-3 territory. You are paying more for less performance in that specific duty.
5. Designing to the typical yield strength. The specification minimum is 310 MPa. Size on that.
6. Leaving scale on after annealing. The chromium-depleted layer under the oxide corrodes first. Insist on full pickling.
7. Treating "Hastelloy C-22" and "C-276" as interchangeable. They are different alloys with opposite strengths; the names look similar and the confusion is common and expensive.
8. Ordering without stating the cobalt cap for nuclear work. The standard allows 2.5%. Nuclear specifications routinely demand 0.20% or less, and that has to be set before melting.

Where is NiCr21Mo14W used?

Typical forged parts for these duties are seamless rolled rings for absorber and vessel courses, forged flanges and nozzles, tube sheets, agitator and pump shafts, valve bodies, stems and seat rings, sleeves and bushings, and hollow bar for machined instrument fittings.

Two worked examples

Example 1: sizing a scrubber flange bolt load on the 310 MPa minimum

Given. A 1,200 mm bore forged weld-neck flange in UNS N06022 on an FGD absorber outlet, design pressure 0.3 MPa, design temperature 80 °C.

The trap. Designers who have just come off a 316L job often carry across an allowable stress from memory. N06022 yields at 310 MPa minimum, only about 1.8 times annealed 316L, while costing roughly twelve times as much per kilogram. Sizing the hub and bolt circle on a typical yield of 400 MPa instead of the 310 MPa minimum leaves no margin if a heat lands at the bottom of the band, which is exactly what a specification minimum is for.

What to do instead. Take the code allowable from the ASME Section II Part D table for SB-564 N06022 at the design temperature; do not derive one from the tensile minimum. Then, because the material is expensive, spend the saved thickness on geometry: a forged weld-neck with a long taper hub distributes the bolt load better than a slip-on and lets you drop a size on the ring blank. On a 1,200 mm flange that is often 80-120 kg of N06022, which is real money.

Example 2: is the alloy right for a 15% sulphuric acid stream at 90 °C with ferric contamination?

Given. Agitator shaft, 15% H₂SO₄, 90 °C, containing dissolved ferric ions and about 500 mg/l chloride from make-up water.

Assessment. Take the two components separately. Plain 15% sulphuric at 90 °C is a reducing duty where C-276 would edge N06022 slightly. But the ferric ions make the stream oxidizing, and under oxidizing conditions the 16% chromium in C-276 becomes the limiting factor while the 21.5% chromium in N06022 does not. The chloride adds pitting risk that rules out 316L and 904L at this temperature.

Decision. N06022 is the correct choice here. The ferric contamination is what makes it correct, and the same stream without ferric would point at C-276. That is the usual pattern with this grade: it earns its price on mixed and variable streams rather than on any single pure acid. Confirm with a coupon in the real fluid before committing to a large forging, and specify ASTM G28 Method A on the order so the anneal is verified.

Glossary

NiCr21Mo14W frequently asked questions

What is NiCr21Mo14W?

NiCr21Mo14W is the EN chemical designation for the nickel-chromium-molybdenum-tungsten alloy with Werkstoff number 2.4602 and UNS number N06022, known generically as Alloy 22. It contains 20.0-22.5% chromium, 12.5-14.5% molybdenum, 2.5-3.5% tungsten and 2.0-6.0% iron with nickel as the balance, and carbon capped at 0.015% and silicon at 0.08%. It is a solid-solution strengthened, fully austenitic corrosion-resistant alloy used where both oxidizing and reducing conditions occur in the same process stream.

Is NiCr21Mo14W the same as Hastelloy C-22?

They describe the same generic chemistry. Hastelloy® C-22® is a registered trademark of Haynes International; NiCr21Mo14W, W.Nr. 2.4602 and UNS N06022 are the generic designations for that chemistry. Jiangyin Jiangnan Metal Co., Ltd. forges and certifies material as UNS N06022 / W.Nr. 2.4602 / NiCr21Mo14W and is not affiliated with any trademark holder. Write UNS N06022 on your drawing so the order is unambiguous.

What is the chemical composition of NiCr21Mo14W (UNS N06022)?

In weight percent: chromium 20.0-22.5, molybdenum 12.5-14.5, tungsten 2.5-3.5, iron 2.0-6.0, cobalt 2.5 max, manganese 0.50 max, vanadium 0.35 max, silicon 0.08 max, carbon 0.015 max, phosphorus 0.02 max, sulphur 0.02 max, nickel balance. Tungsten is a specified element even though many abbreviated datasheets omit it.

What are the mechanical properties of NiCr21Mo14W forgings?

ASTM B564 / ASME SB-564 requires a minimum of 690 MPa (100 ksi) tensile strength, 310 MPa (45 ksi) yield strength at 0.2% offset and 45% elongation in 2 in or 4D for solution-annealed material. Typical production values are around 780-800 MPa tensile, 370-400 MPa yield and 60-65% elongation. Hardness is not a B564 acceptance requirement; annealed material typically runs 85-90 HRB.

Can NiCr21Mo14W be hardened by heat treatment?

No. NiCr21Mo14W is solid-solution strengthened and contains no gamma-prime forming elements, so there is no ageing or precipitation-hardening cycle for it. The only correct heat treatment is a solution anneal at 1104-1177 °C, commonly 1121 °C, followed by a rapid water quench. Any datasheet that specifies solution treatment plus ageing for this alloy is describing a different material.

NiCr21Mo14W versus C-276: which should I use?

NiCr21Mo14W (N06022) carries about 21.5% chromium against roughly 16% in C-276 (N10276), so it is the better choice in oxidizing and mixed acids, wet chlorine, hypochlorite, nitric-bearing streams and flue gas desulphurisation. C-276 carries more molybdenum, so it holds a small advantage in strongly reducing service such as hot concentrated hydrochloric acid. Where the process swings between oxidizing and reducing, N06022 is the safer single choice.

Which standards cover NiCr21Mo14W forgings?

ASTM B564 and ASME SB-564 for forgings; ASTM B462 for forged flanges, fittings, valves and parts; ASTM B574 for rod and bar; ASTM B575 for plate, sheet and strip; ASTM B622 and B626 for tube; ASTM A494 grade CX2MW for the cast equivalent; DIN 17744 and 17752 and VdTÜV Werkstoffblatt 479 in Europe; ISO 9722 and ISO 6208. Inspection documents are issued to EN 10204 3.1 or 3.2.

What sizes of NiCr21Mo14W forgings can Jiangyin Jiangnan Metal make?

Seamless rolled rings from 200 mm to 2,500 mm outside diameter with a 30 mm minimum wall, forged discs to 1,800 mm diameter, shafts to 8 m length, round bar from Ø25 mm to Ø500 mm, and single-piece weights up to 8,000 kg. Flanges, sleeves, bushings, tube sheets, valve bodies and near-net shapes are produced to drawing.

How is NiCr21Mo14W forged?

Heat to 1177-1204 °C and finish above roughly 955 °C, working in incremental passes with frequent reheats because the hot flow stress is far higher than carbon steel. Aim for at least 4:1 reduction to break down the cast structure, then solution anneal and water quench the finished forging. Never allow slow cooling through 600-1000 °C, where mu phase, P phase and M₆C carbides precipitate on grain boundaries.

Is NiCr21Mo14W magnetic?

No. NiCr21Mo14W is fully austenitic in every condition with a relative magnetic permeability of approximately 1.0 at room temperature, so it is effectively non-magnetic and cannot be made magnetic by heat treatment. Magnetic particle examination therefore does not apply, so specify liquid penetrant to ASTM E165 instead.

What is the density of NiCr21Mo14W?

8.69 g/cm³, equivalent to 0.314 lb/in³. The forging weight calculator on this page uses that figure.

Is NiCr21Mo14W approved for sour service?

UNS N06022 is listed in NACE MR0175 / ISO 15156-3 and NACE MR0103 / ISO 17945 for defined service envelopes, but listing is conditional on product form, condition, hardness and the specific combination of H₂S partial pressure, chloride content, pH and temperature. Confirm the current edition against your actual service conditions and state the requirement on the purchase order so the material is procured and certified against it.

Can NiCr21Mo14W be welded without post-weld heat treatment?

Yes, and that is normal practice. Carbon at 0.015% maximum and silicon at 0.08% maximum were specified low precisely to keep the heat-affected zone stable, so fabricated equipment goes into service as welded. Use matching ERNiCrMo-10 or ENiCrMo-10 consumables, keep interpass temperature below about 100 °C, use stringer beads and keep the joint free of sulphur, lead, zinc and grease.

What is the lead time and minimum order for NiCr21Mo14W forgings?

Twelve to sixteen weeks is typical, because the heat is melted against your specification rather than pulled from stock. Third-party witnessed release adds one to two weeks. Below roughly 500 kg the order is consolidated onto a larger heat, which affects both price and schedule, so state the quantity at enquiry stage.

What is the maximum service temperature of NiCr21Mo14W?

For aqueous corrosion service the practical limit is set by the process, not the metal. For sustained dry high-temperature service, keep continuous exposure below about 550 °C: above that the alloy begins to precipitate mu phase and intermetallics in service and progressively loses corrosion resistance and toughness. It also has very little creep strength, so it is not a structural high-temperature material. For hot gas duty use Alloy 625, Hastelloy X or Alloy 617.

References

1. ASTM B564 / B564M, Standard Specification for Nickel Alloy Forgings, ASTM International. Chemical and mechanical requirements for UNS N06022 forged product.
2. ASTM B462, Standard Specification for Forged or Rolled UNS N06030, UNS N06022 and Other Alloy Pipe Flanges, Forged Fittings, and Valves and Parts for Corrosive High-Temperature Service, ASTM International.
3. ASTM B574, Standard Specification for Low-Carbon Nickel-Chromium-Molybdenum, Low-Carbon Nickel-Molybdenum-Chromium and Other Alloy Rod, ASTM International.
4. ASTM B575, Standard Specification for Low-Carbon Nickel-Chromium-Molybdenum Alloy Plate, Sheet and Strip, ASTM International.
5. ASME Boiler and Pressure Vessel Code, Section II Part B (SB-564, SB-574, SB-575) and Part D allowable stress tables.
6. ASTM A494 / A494M, grade CX2MW, the cast equivalent chemistry.
7. ASTM G28, Standard Test Methods for Detecting Susceptibility to Intergranular Corrosion in Wrought, Nickel-Rich, Chromium-Bearing Alloys, Method A.
8. ASTM G48, Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution, Methods C and D.
9. DIN 17744 and DIN 17752, wrought nickel alloys; VdTÜV Werkstoffblatt 479 for material 2.4602.
10. ISO 9722 and ISO 6208, wrought nickel and nickel alloy designations and product forms.
11. NACE MR0175 / ISO 15156-3 and NACE MR0103 / ISO 17945, materials for H₂S-containing environments.
12. ASTM A388 / A388M, Standard Practice for Ultrasonic Examination of Steel Forgings; EN 10228-3, ultrasonic testing of forgings; SEP 1921.
13. EN 10204, Metallic products. Types of inspection documents, CEN.
14. AWS A5.14 (ERNiCrMo-10) and AWS A5.11 (ENiCrMo-10), welding consumables for UNS N06022.
15. ASM Handbook, Volume 2: Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM International. Covers corrosion-resistant nickel alloys.
16. ASM Handbook, Volume 13B: Corrosion: Materials, ASM International.

Standards are cited by number; always work to the revision in force at your contract date. Test results on our certificates are independent and traceable to calibrated equipment.

About the manufacturer, and how to cite this page

Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China, operating since 2008 with 460 employees including 9 senior and 32 intermediate engineers. The plant runs 1 t to 9 t open-die hammers, 4,500 t and 5,000 t hydraulic presses and radial-axial ring mills to 2,500 mm outside diameter, with in-house solution annealing, water quenching, machining, mechanical testing, corrosion testing and non-destructive examination. Alongside NiCr21Mo14W / UNS N06022 the company forges carbon, alloy and tool steels, the full precipitation-hardening stainless family, duplex grades and the corrosion-resistant and high-temperature nickel alloys. Quality management is certified to ISO 9001:2015 and material is supplied with EN 10204 3.1 certification as standard, 3.2 with third-party witness on request.

Related grades we forge

• C-276 / N10276
• Hastelloy C-22
• Alloy 59 / N06059
• Alloy B-3 / N10675
• Inconel 625 / N06625
• Inconel 718 / N07718
• Incoloy 825 / N08825
• Monel 400 / N04400
• All nickel alloys
• Forged rings
• Forged discs
• Open-die forgings