UNS N06022 (Alloy C-22) Forgings: Rolled Rings, Flanges, Bars, Discs and Shafts
Summary
UNS N06022 is a low-carbon nickel-chromium-molybdenum-tungsten alloy. Nominal composition is 56 % nickel, 22 % chromium, 13 % molybdenum and 3 % tungsten. It is sold under the trade name Hastelloy C-22 and carries the European designation W.Nr. 2.4602 (NiCr21Mo14W). The alloy is not age-hardenable and ships solution annealed. Minimum properties in that condition are 690 MPa (100 ksi) tensile strength, 310 MPa (45 ksi) 0.2 % proof stress and 45 % elongation. Its pitting resistance equivalent number is about 70.
Jiangyin Jiangnan Metal Co., Ltd. forges UNS N06022 to ASTM B564 at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. Product forms are seamless rolled rings, flanges, round bars, discs, shafts, sleeves, bushings and tube sheets, in diameters from 80 mm to 6,000 mm, single-piece weights from 10 kg to 15,000 kg and lengths to 12,000 mm. Certification is EN 10204 3.1 or 3.2.
- UNS number
- N06022
- Trade name
- Hastelloy C-22
- Werkstoff Nr.
- 2.4602
- Alloy type
- Ni-Cr-Mo-W, solid solution
- Forging spec
- ASTM B564
- Density
- 8.69 g/cm3
- Tensile min.
- 690 MPa / 100 ksi
- PREN
- about 70
What is UNS N06022?
UNS N06022 contains about 56 % nickel, 20 to 22.5 % chromium, 12.5 to 14.5 % molybdenum and 2.5 to 3.5 % tungsten. Carbon is held to 0.015 % and silicon to 0.08 %. All of its strength comes from elements held in solid solution. There are no aluminium, titanium or niobium additions, so no second phase precipitates on ageing.
Three things follow from that. The alloy stays tough from cryogenic temperatures upward. It welds without post-weld heat treatment in most thicknesses. And no heat treatment will raise its strength; only cold work does that.
The trade name Hastelloy C-22 belongs to Haynes International. The same chemistry is also sold as Alloy 22, Nicrofer 5621 hMoW and VDM Alloy 22. Trade names cannot be applied to material from other mills, so purchase specifications and mill certificates use UNS N06022 or Werkstoff 2.4602. Jiangyin Jiangnan Metal certifies to UNS N06022, ASTM B564.
The alloy dates from the mid-1980s. Alloy C-276 was already available for reducing acids, but its 16 % chromium limited it in oxidising service, and Alloy C-4 had good thermal stability with weaker resistance to localised corrosion. N06022 was designed with chromium at about 22 %, molybdenum near 13 % and tungsten at 3 %, so a single grade covers hydrochloric and dilute sulphuric acid as well as nitric acid, wet chlorine and ferric or cupric chlorides. Plants that cannot predict their upset chemistry specify it for that reason.
Standards and equivalent designations for UNS N06022
| System / country | Designation | Notes |
|---|---|---|
| UNS (USA) | N06022 | Primary purchasing designation |
| Trade names | Hastelloy C-22, Alloy 22, Nicrofer 5621 hMoW, VDM Alloy 22 | Registered marks of their respective owners |
| Germany (DIN / EN) | 2.4602, NiCr21Mo14W | DIN 17744, VdTUV Werkstoffblatt 479 |
| Weld filler | ERNiCrMo-10 (AWS A5.14) | Weld deposit W86022 |
| ISO weldability group | Group 43 | ISO 15608 |
| Forgings | ASTM B564 / ASME SB-564 | Specification used for all Jiangnan N06022 forgings |
| Flanges and fittings | ASTM B462 / ASME SB-462 | Corrosive high-temperature service |
| Rod and bar | ASTM B574 / ASME SB-574 | Source of the mechanical minima below |
| Plate, sheet and strip | ASTM B575 | |
| Seamless pipe and tube | ASTM B622, B626, B619 | Seamless, welded tube, welded pipe |
| Fittings | ASTM B366 | WPHC-22 grade |
| Pressure equipment | ASME BPVC Code Case 2226 | Section VIII to about 677 C (1,250 F) |
| Sour service | NACE MR0175 / ISO 15156-3 | Listed CRA, hardness 35 HRC maximum |
Chemical composition of UNS N06022
The limits below apply to UNS N06022 forgings supplied to ASTM B564, which shares its chemistry table with ASTM B574 and B575. Every heat we produce is analysed by optical emission spectrometry and reported on the EN 10204 3.1 certificate against the heat number stamped on the forging.
| Element | Minimum | Maximum | Function |
|---|---|---|---|
| Nickel (Ni) | Balance, nominally 56 | Matrix. General corrosion resistance and immunity to chloride SCC | |
| Chromium (Cr) | 20.0 | 22.5 | Resistance in oxidising media, passive film stability |
| Molybdenum (Mo) | 12.5 | 14.5 | Reducing acid resistance, pitting and crevice resistance |
| Tungsten (W) | 2.5 | 3.5 | Reinforces resistance to localised corrosion |
| Iron (Fe) | 2.0 | 6.0 | Controlled residual from raw materials |
| Cobalt (Co) | 2.5 | Residual, restricted further for nuclear service | |
| Vanadium (V) | 0.35 | Residual | |
| Manganese (Mn) | 0.50 | Deoxidiser | |
| Silicon (Si) | 0.08 | Held low to limit intermetallic precipitation | |
| Carbon (C) | 0.015 | Low-carbon grade, limits grain-boundary carbides | |
| Phosphorus (P) | 0.02 | Impurity | |
| Sulphur (S) | 0.02 | Impurity, controlled for hot workability | |
PREN is calculated as %Cr + 3.3 (%Mo + 0.5 %W). Mid-range N06022 chemistry gives about 70, against roughly 43 for super duplex stainless steel and 50 for Alloy 625. The figure ranks chloride pitting only. It does not account for the margin that chromium gives N06022 over C-276 in oxidising service.
Mechanical properties of UNS N06022 forgings
| Property | Specified minimum | Typical as forged and annealed |
|---|---|---|
| Ultimate tensile strength | 690 MPa / 100 ksi min. | 760 to 800 MPa (110 to 116 ksi) |
| 0.2 % proof stress (yield) | 310 MPa / 45 ksi min. | 355 to 400 MPa (52 to 58 ksi) |
| Elongation in 4D | 45 % min. | 55 to 65 % |
| Reduction of area | By agreement | 60 to 70 % |
| Hardness, annealed | 100 HRB max. | 85 to 95 HRB (about 165 to 200 HB) |
| Hardness limit, sour service | 35 HRC maximum to NACE MR0175 / ISO 15156-3. Not a binding constraint in the annealed condition | |
| Modulus of elasticity | 206 GPa | 29.9 million psi |
| Impact toughness | Ductile to minus 196 C, typically above 200 J Charpy V, no ductile-to-brittle transition | |
Nothing above these minima comes from heat treatment. Cold work is the only route to higher strength. Elevated-temperature strength falls gradually, and ASME Code Case 2226 allows Section VIII construction to about 677 C (1,250 F). For continuous service above roughly 540 C, check thermal stability requirements with us before the specification is fixed, since long exposure in the precipitation range reduces toughness.
Physical properties of UNS N06022
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.69 g/cm3 | 0.314 lb/in3 |
| Melting range | 1,357 to 1,399 C | 2,475 to 2,550 F |
| Modulus of elasticity | 206 GPa | 29,900 ksi |
| Thermal conductivity | 10.1 W/m K | 70 Btu in/h ft2 F |
| Specific heat | 414 J/kg K | 0.099 Btu/lb F |
| Mean thermal expansion, 20 to 100 C | 12.4 micrometre/m K | 6.9 microinch/in F |
| Electrical resistivity | 1.14 micro-ohm m | 114 micro-ohm cm |
| Magnetic permeability | About 1.0002. Effectively non-magnetic, so use PT rather than MPI for surface flaw detection | |
| Maximum code service temperature | About 677 C | About 1,250 F, ASME Code Case 2226 |
Corrosion resistance of UNS N06022
N06022 is specified where the environment moves between oxidising and reducing conditions, or where the operator cannot say in advance which will apply. The behaviour below is documented in the literature and matches service experience on forgings we have supplied.
- Flue gas desulfurisation. Scrubber liquor combines low pH, high chloride and dissolved oxygen. Austenitic stainless steel fails in that mixture. N06022 covers all three conditions, which is why it is the usual choice for absorber internals, dampers, spray headers and quench nozzles.
- Pitting and crevice corrosion. At PREN 70 the alloy resists 6 % ferric chloride (ASTM G48) at temperatures where 6Mo austenitic and super duplex grades fail. This matters under scale deposits and in gasketed joints.
- Chloride stress-corrosion cracking. Effectively immune. 300-series stainless steels crack in the same hot chloride streams.
- Oxidising media. Reliable in nitric acid mixtures, wet chlorine, chlorine dioxide and ferric or cupric chloride solutions. This is the regime where Alloy C-276 is weaker.
- Reducing acids. Good resistance in hydrochloric acid at moderate concentration and in dilute sulphuric acid, including hot contaminated mineral acids. For strongly reducing hot concentrated HCl, C-276 or Hastelloy B-3 is the better choice.
- Organic acids and mixed chemistry. Used in acetic acid and acetic anhydride, phosphoric acid, pesticide and pharmaceutical process streams, and acid mixtures that vary batch to batch.
- Thermal stability. Better than C-276. The alloy is still not intended for extended service between 650 C and 870 C.
Forging and heat treatment of UNS N06022
Melting route
Melting is EAF plus VOD, followed by electroslag remelting. VIM plus ESR plus VAR is used where the specification calls for the lowest gas and inclusion content. Refining is what holds carbon below 0.015 % and silicon below 0.08 %. Both figures govern how much intermetallic phase the alloy tolerates before its corrosion resistance drops.
Forging practice
- Charge temperature 1,150 to 1,177 C. Do not exceed 1,177 C, since grain coarsening sets in well before the 1,357 C incipient melting point.
- Take heavy reduction between 1,177 C and 1,040 C. Finish forging above 1,010 C, below which cracking risk rises sharply. The alloy is stiffer to work than stainless steel and needs frequent reheats.
- Keep dwell in the 650 to 870 C band short during every reheat and transfer, not only at final heat treatment.
- Minimum forging ratio 3:1 from the ESR ingot, and 4:1 or higher for ring blanks and pressure-boundary parts.
- Equipment: 1 t, 3 t, 6 t and 9 t forging hammers, a 4,500 t hydraulic press, and 3-metre and 6-metre seamless ring-rolling mills.
Heat treatment
| Treatment | Temperature | Purpose |
|---|---|---|
| Solution annealing (standard supply condition) | 1,121 C plus or minus 14 C, then rapid water quench | Dissolves intermetallics and carbides, restores full ductility and corrosion resistance |
| Quench medium | Water, rapid | Air cooling acceptable only on thin sections. Slow cooling re-precipitates sigma and mu phases |
| Re-anneal after cold work | 1,121 C | Required after significant cold forming or straightening |
| Solution plus ageing | Not applicable. N06022 has no age-hardening phases and ageing embrittles the forging. Where high strength is the requirement, specify a precipitation-hardening grade such as Inconel 718 | |
UNS N06022 forged product forms and size range
We produce the following UNS N06022 forged forms to customer drawing or to free-form dimensions. All are open-die forged or ring-rolled. No castings are supplied.
| Product form | Size range | Typical use |
|---|---|---|
| Seamless rolled rings | OD 80 to 6,000 mm, weight 10 to 15,000 kg | Scrubber shell courses, valve bodies, flange blanks, bearing rings |
| Forged flanges | DN 15 to DN 2000, WN / SO / BL to ASME B16.5 and B16.47 | FGD and chemical process piping, heat exchangers, columns |
| Forged round bars | Diameter 20 to 1,200 mm, length to 12,000 mm | Shafts, stems, fastener stock, machining blanks |
| Forged discs and disks | Diameter 100 to 3,000 mm | Blind flanges, closures, tube-sheet blanks, valve discs |
| Forged tube sheets | Diameter to 3,000 mm, thickness to 500 mm | Shell-and-tube heat exchangers |
| Forged shafts and spindles | Diameter 50 to 1,000 mm, length to 12,000 mm | Scrubber agitators, chemical pumps, damper shafts |
| Forged sleeves and bushings | OD 100 to 2,000 mm | Subsea equipment, wear sleeves, pump liners |
| Forged hollow bars and thick-wall pipe | OD 150 to 1,500 mm | Cylinders, liners, nozzle bodies |
| Forged valve components | Per drawing | Bodies, bonnets, stems, seat rings, plugs, blocks |
| Forged blocks and nozzles | Per drawing, to 15,000 kg | Pressure-vessel nozzles, manifolds, reactor connections |
Machining scope is selectable: as-forged with allowance, rough machined, or finish machined to drawing tolerance. On rings above 2,000 mm OD we recommend rough machining before final solution annealing, to control quench distortion.
Applications for UNS N06022 forgings by industry
Flue gas desulfurisation and air pollution control
Absorber internals, spray headers, damper and agitator shafts, quench nozzles, rolled rings and flanges exposed to chloride-bearing acidic condensate. This is the largest single application for the alloy worldwide.
Chemical processing and pharmaceuticals
Reactor nozzles, agitator shafts, pump and valve components in mixed acids, acetic acid, phosphoric acid and pesticide production. Also high-purity reactor and filter-dryer components for pharmaceutical and fine-chemical plant, where product contamination is unacceptable.
Oil, gas and refining
Wellhead and Christmas-tree components, valve bodies and stems, hangers and forged rings for sour service certified to NACE MR0175 / ISO 15156-3, in onshore, offshore, subsea and deepwater production systems.
Pulp, paper and waste incineration
Bleach-plant washers and mixers in chlorine dioxide service. Scrubber shafts, quench nozzles and heat-exchanger tube sheets for energy-from-waste and incineration plant.
Heat exchangers, pressure equipment and power
Forged tube sheets, shell and girth flanges, channel covers and nozzles for shell-and-tube heat exchangers, columns, towers, silos and pressure vessels. Also geothermal well components, and nuclear fuel reprocessing hardware where cobalt content is restricted.
UNS N06022 compared with C-276, Alloy 59 and Inconel 625
| Alloy | Key chemistry | Yield strength (min.) | PREN | Best suited to |
|---|---|---|---|---|
| UNS N06022 (Alloy C-22) | Cr 22, Mo 13, W 3 | 310 MPa | 70 | Oxidising and reducing service in the same plant, FGD scrubbers, mixed acids. Strong pitting, crevice and chloride SCC resistance |
| UNS N10276 (Hastelloy C-276) | Cr 16, Mo 16, W 4 | 283 MPa | 75 | Strongly reducing conditions such as hot HCl and dilute sulphuric acid. Weaker in oxidising media because of the lower chromium |
| UNS N06059 (Alloy 59) | Cr 23, Mo 16, no W | 310 MPa | 76 | The most aggressive mixed-acid duties. Tungsten free, very low carbon and silicon, good thermal stability |
| UNS N06625 (Inconel 625) | Cr 21.5, Mo 9, Nb 3.6 | 414 MPa | 50 | Higher strength from niobium, wide code acceptance, lower cost, but less resistance to localised corrosion |
The guidance we give customers runs as follows. For reliably reducing service, C-276 is adequate and usually cheaper. For oxidising service, or where conditions move between the two, specify N06022. For the most aggressive mixed-acid duties, step up to Alloy 59. Where mechanical strength drives the choice rather than localised corrosion, Inconel 625 gives better value. One caution on PREN: C-276 scores higher than C-22 on the formula, yet performs worse in nitric-bearing and wet-chlorine service, because the formula ranks chloride pitting only.
Testing, non-destructive examination and certification
- Chemical analysis per heat by optical emission spectrometry, the only method that reliably verifies the 0.015 % carbon ceiling. PMI on the finished forging on request.
- Mechanical testing. Tensile, elongation, reduction of area, Brinell and Rockwell hardness. Charpy impact testing including cryogenic temperatures on request.
- Corrosion testing. ASTM G28 method A for intergranular attack, which is the standard proof that solution annealing was carried out correctly. ASTM G48 method A or C for pitting and critical crevice temperature.
- Ultrasonic examination to EN 10228-3, SEP 1921 or ASTM A388, with the acceptance class stated on the order.
- Liquid penetrant examination to ASTM E165 for surface flaws. Magnetic particle inspection does not apply, since the alloy is non-magnetic.
- Microstructure. Grain size to ASTM E112, with intermetallic phase check where thermal stability matters.
- Certification. EN 10204 3.1 as standard. EN 10204 3.2 witnessed by TUV, SGS, BV, Lloyd's Register or DNV on request. NACE MR0175 / ISO 15156-3 compliance statements issued for sour service.
How to order UNS N06022 forgings
- Send the enquiry. Email your drawing, dimensions or rough sizes, quantity, standard such as ASTM B564, and certificate level to sales@steelforgepieces.com. A formal drawing is not required for a budget price. OD by ID by height, or diameter by length, is enough.
- Receive the quotation within 24 working hours, covering forging weight, unit price, machining allowance, testing scope and lead time.
- Approve the inspection and test plan covering melting route, forging ratio, solution annealing, mechanical testing, corrosion testing and NDT.
- Manufacture and test. Melting, forging, solution annealing at about 1,121 C with rapid quench, machining and full testing.
- Certification and shipment under EN 10204 3.1 or 3.2, packed in fumigated cases, EXW, FOB Shanghai or CIF. Lead time is normally 25 to 45 days.
Request a quotation for UNS N06022 forgings
Send your drawing or size list. We quote within one working day.
- Company
- Jiangyin Jiangnan Metal Co., Ltd., open-die forging factory
- Address
- No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China
- Phone / WhatsApp
- 0086-189-2135-9659
- sales@steelforgepieces.com
- Website
- www.steelforgepieces.com
Frequently asked questions about UNS N06022
Is UNS N06022 the same as Hastelloy C-22?
Yes. UNS N06022 is the UNS number for the alloy sold under the trade name Hastelloy C-22, a registered trademark of Haynes International. The same chemistry is 2.4602 or NiCr21Mo14W in Germany, and is also sold as Nicrofer 5621 hMoW and VDM Alloy 22. We certify material to UNS N06022, ASTM B564, which avoids any trademark question.
Can UNS N06022 be hardened by heat treatment?
No. The alloy contains no aluminium, titanium or niobium, so nothing precipitates on ageing and strength does not increase. A dwell between roughly 650 C and 870 C precipitates sigma and mu phases that embrittle the forging and reduce its corrosion resistance. The correct final condition is solution annealing at about 1,121 C followed by a rapid water quench. Higher strength comes only from cold work.
What is the difference between Alloy C-22 and Alloy C-276?
Alloy C-22 carries about 22 % chromium and 13 % molybdenum. Alloy C-276 carries about 16 % chromium and 16 % molybdenum. The higher chromium of C-22 gives better performance in oxidising media such as nitric acid mixtures, wet chlorine and ferric or cupric chlorides, and better thermal stability. C-276 holds an advantage in strongly reducing service such as hot hydrochloric acid. If your process moves between the two regimes, C-22 is usually the safer specification.
Which standard covers UNS N06022 forgings?
ASTM B564, and its ASME equivalent SB-564, is the specification for nickel alloy forgings including UNS N06022. Related specifications are ASTM B462 for flanges and fittings in corrosive service, B574 for rod and bar, B575 for plate, sheet and strip, B622 for seamless pipe and tube, and B366 for fittings. For pressure equipment, ASME Code Case 2226 allows Section VIII construction to about 677 C (1,250 F). Sour-service forgings are additionally supplied to NACE MR0175 / ISO 15156-3.
Why is UNS N06022 used in flue gas desulfurisation plants?
Scrubber liquor combines low pH, high chloride content and dissolved oxygen. Austenitic stainless steel fails in that mixture, and most single-purpose corrosion alloys cover only part of it. N06022 covers all three conditions, because chromium handles the oxidising side while molybdenum and tungsten handle chlorides and reducing acid. Its PREN of about 70 also keeps it clear of pitting and crevice attack under scale deposits.
Is UNS N06022 approved for sour service?
Yes. It is listed among the corrosion-resistant nickel-base alloys of NACE MR0175 / ISO 15156-3 for H2S-containing oil and gas production, subject to the environmental and hardness limits that standard sets for the relevant material group. Forgings are supplied solution annealed, where typical hardness of 85 to 95 HRB sits well below the 35 HRC ceiling. Hardness results and the applicable material group appear on the certificate.
Is UNS N06022 magnetic?
No. The alloy has a fully austenitic face-centred-cubic structure with a relative magnetic permeability of about 1.0002, so it is effectively non-magnetic in the solution-annealed condition. Surface flaw detection on N06022 forgings uses liquid penetrant examination to ASTM E165 rather than magnetic particle inspection.
Can UNS N06022 be welded?
Yes. The alloy welds by GTAW and GMAW with matching ERNiCrMo-10 filler wire, giving weld deposit W86022. No preheat is required and post-weld heat treatment is normally unnecessary. Hold interpass temperature below about 150 C and keep heat input low, since time in the 650 to 870 C range promotes intermetallic precipitation in the heat-affected zone. The alloy is also used as a weld overlay and filler for other Ni-Cr-Mo grades.
What size UNS N06022 forgings can you produce?
We produce UNS N06022 open-die forgings with diameters from 80 mm to 6,000 mm, single-piece weights from 10 kg to 15,000 kg and lengths up to 12,000 mm. The plant operates 1, 3, 6 and 9 tonne forging hammers, a 4,500 tonne hydraulic press and 3-metre and 6-metre seamless ring-rolling mills at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China.
What certificates are supplied?
Every forging is released with an EN 10204 3.1 mill certificate showing heat number, chemical analysis, mechanical results, heat treatment record and NDT report. EN 10204 3.2 certificates witnessed by TUV, SGS, BV, Lloyd's Register or DNV are available on request, along with ASTM G28 method A corrosion testing, ASTM G48 pitting testing, PMI reports and third-party ultrasonic examination to EN 10228-3, SEP 1921 or ASTM A388.
What is the lead time for custom UNS N06022 forgings?
Normally 25 to 45 days from order confirmation, depending on the ESR ingot size required, the machining scope and the certificate level. Quotations are issued within 24 working hours of receiving a drawing or size list at sales@steelforgepieces.com.
About the supplier of these UNS N06022 forgings
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. The company employs 460 people, including 9 senior engineers and 32 intermediate engineers, and manufactures open-die forgings and seamless rolled rings in carbon steel, alloy steel, tool steel, stainless steel and nickel alloys including UNS N06022, in diameters from 80 mm to 6,000 mm and single-piece weights from 10 kg to 15,000 kg.
Production is integrated in-house: melting by EAF plus VOD plus ESR, or VIM plus ESR plus VAR; open-die forging on 1 to 9 tonne hammers and a 4,500 tonne hydraulic press; ring rolling on 3-metre and 6-metre mills; heat treatment; machining; and mechanical and non-destructive testing. Forgings are certified to EN 10204 3.1 or 3.2 and shipped worldwide. Enquiries to sales@steelforgepieces.com or 0086-189-2135-9659.
Jiangyin Jiangnan Metal Co., Ltd. (2026). UNS N06022 (Alloy C-22) Forgings: Composition, Properties and
Forged Product Range. steelforgepieces.com.
https://www.steelforgepieces.com/Nickel-Alloy/UNS-N06022.html. Contact sales@steelforgepieces.com,
+86-189-2135-9659, No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China.
Standards referenced on this page
- ASTM B564 / ASME SB-564, Standard Specification for Nickel Alloy Forgings
- ASTM B462, B574, B575, B622 and B366, alloy C-22 flanges, rod, plate, tube and fittings
- ASME Boiler and Pressure Vessel Code, Section VIII, Code Case 2226, use to about 677 C
- NACE MR0175 / ISO 15156-3, materials for use in H2S-containing environments
- EN 10204, types of inspection documents for metallic products
- EN 10228-3, SEP 1921 and ASTM A388, ultrasonic examination of forgings
- ASTM E165, liquid penetrant examination. ASTM E112, grain size
- ASTM G28 method A, intergranular corrosion. ASTM G48, pitting and crevice corrosion
- AWS A5.14 ERNiCrMo-10, matching weld filler metal. ISO 15608 group 43
- DIN 17744 and VdTUV Werkstoffblatt 479, for 2.4602 / NiCr21Mo14W