{"id":3599,"date":"2026-09-16T11:04:52","date_gmt":"2026-09-16T08:04:52","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/en\/hastelloy-c-22\/"},"modified":"2026-09-25T16:26:43","modified_gmt":"2026-09-25T13:26:43","slug":"hastelloy-c-22","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/en\/hastelloy-c-22\/","title":{"rendered":"Hastelloy C-22"},"content":{"rendered":"

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Hastelloy C-22 \/ (2.4602) \/ UNS N06022 \/ AMS 5766<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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Hastelloy C-22<\/div>\n
UNS N06022 \u00b7 W.Nr. 2.4602 \u00b7 NiCr21Mo14W (EN) \u00b7 NiCr21Mo14W3 (ISO) \u00b7 DIN 17744 \/ 17750-17754 \u00b7 Ni balance (~56%) \u2013 Cr 20.0-22.5% \u2013 Mo 12.5-14.5% \u2013 W 2.5-3.5% \u2013 Fe 2.0-6.0% \u2013 Co 2.5% max \u2013 C 0.015% max \u2013 Si 0.08% max \u2013 Mn 0.50% max \u2013 V 0.35% max \u2013 P 0.02% max \u2013 S 0.02% max. DO NOT CONFUSE IT WITH C-276: same family, but NOT the same alloy. The chromium ceiling of C-22 is 22.5%, that of C-276 is 16.5%; against that, the molybdenum of C-22 is 12.5-14.5% and that of C-276 is 15.0-17.0%. Chromium carries resistance in oxidizing media, molybdenum carries it in reducing media \u2014 that is exactly where the two alloys part company. Trade names: Hastelloy C-22 (Haynes International) \u00b7 VDM Alloy 22 \/ Nicrofer 5621 hMoW (VDM Metals) \u00b7 ATI 22 (ATI) \u00b7 Alloy 22 (Carpenter Technology, Corrosion Materials).<\/div>\n
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Not to be confused with<\/div>\n

Hastelloy C-276<\/a>Hastelloy C-2000<\/a><\/div>\n<\/div>\n

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For what<\/div>\n
Ni-Cr-Mo-W based SOLID SOLUTION alloy. NOT PRECIPITATION HARDENABLE; it cannot be hardened by heat treatment, strength is raised only by cold work and is removed again by solution annealing.<\/div>\n<\/div>\n
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Forms<\/div>\n
Bar \u00b7 flat bar \u00b7 plate \u00b7 sheet \u00b7 strip \u00b7 seamless pipe \u00b7 welded pipe \u00b7 tube \u00b7 forging \u00b7 flange \u00b7 fitting. All forms are supplied to order.<\/div>\n<\/div>\n
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Standards<\/div>\n
THERE IS NO AMS NUMBER \u2014 no verified SAE\/AMS specification could be found for this alloy (see the specification note). The order is placed directly against the ASTM\/ASME number: ASTM B575 \/ ASME SB-575 \u2014 plate, sheet and strip. \u00b7 ASTM B906 \/ ASME SB-906 \u2014 strip and thin sheet (general requirements). \u00b7 ASTM B574 \/ ASME SB-574 \u2014 round, square and hexagonal bar, and wire. \u00b7 ASTM B472 \u2014 billet and bar stock. \u00b7 ASTM B564 \/ ASME SB-564 \u2014 forgings. \u00b7 ASTM B462 \/ ASME SB-462 \u2014 forged or rolled flanges, fittings and valve parts. \u00b7 ASTM B366 \/ ASME SB-366 \u2014 welded and seamless fittings. \u00b7 ASTM B622 \/ ASME SB-622 \u2014 seamless pipe and tube. \u00b7 ASTM B619 \/ ASME SB-619 \u2014 welded pipe. \u00b7 ASTM B626 \/ ASME SB-626 \u2014 welded tube. \u00b7 ASTM B751 \u2014 general requirements for welded tube. \u00b7 ASTM B775 \u2014 general requirements for welded pipe. \u00b7 ASTM A494 grade CX2MW \u2014 castings (N26022). \u00b7 AWS A5.14 ERNiCrMo-10 (welding wire) and AWS A5.11 ENiCrMo-10 (covered electrode). \u00b7 NACE MR0175 \/ ISO 15156 and NACE MR0103 \/ ISO 17945 \u2014 sour service. \u00b7 Europe: DIN 17744 (composition) \u00b7 17750 (sheet, plate, strip) \u00b7 17751 (seamless tube) \u00b7 17752 (bar) \u00b7 17753 (wire) \u00b7 17754 (forgings) \u00b7 VdTUV 479 \u00b7 ISO 6207 \u00b7 6208 \u00b7 9722 \u00b7 9723 \u00b7 9724 \u00b7 18274.
NO AMS NUMBER COULD BE VERIFIED FOR N06022 and no AMS row has been put on the card. The specification list published by Haynes International, the originator of the alloy, gives only ASTM\/ASME and AWS numbers;<\/span><\/div>\n<\/div>\n
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Advantage<\/div>\n
A measurable advantage over C-276, the family standard, in oxidizing media and in crevice corrosion. In numbers, FROM ONE PRODUCER’S SINGLE TABLE (Haynes International;<\/div>\n<\/div>\n
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Welding<\/div>\n
Filler metal: matching filler AWS A5.14 ERNiCrMo-10 (wire) and AWS A5.11 ENiCrMo-10 (covered electrode). VDM Metals names its own fillers: VDM FM 622 (2.4635) and VDM FM 59 (2.4607). PREHEAT: not required;<\/div>\n<\/div>\n
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Limits<\/div>\n
1) STRESS RELIEVING IS PROHIBITED: post-weld stress relieving at intermediate temperatures IS NOT APPLIED. Haynes International’s wording: stress relief heat treatments at the temperatures commonly used for carbon steels are ‘normally ineffective for these alloys’, and post-weld heat treatment at those intermediate temperatures ‘may\u2026<\/div>\n<\/div>\n
REQUEST A QUOTE<\/a>All nickel alloys →<\/a>TECHNICAL DETAILS ↓<\/span><\/div>\n
Compiled from manufacturer data sheets \u00b7 confirm against the current specification before ordering<\/div>\n<\/div>\n<\/div>\n

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