Alloy 22 / Hastelloy C-22 (UNS N06022) Werkstoff 2.4602:-

Nickel Alloy 22 is available in Bar, Sheet, Plate, Forging Stock and Welding Wire. For all stock availability contact Sales.

Alloy Name Trade Name UNS No. German Specs
Nickel Alloy 22 Hastelloy C-22 UNS N06022 Werkstoff 2.4602

Hastelloy C22, also known as alloy C22, is a versatile austenitic nickel-chromium-molybdenum-tungsten alloy with enhanced resistance to pitting, crevice corrosion and stress corrosion cracking. The high chromium content provides good resistance to oxidizing media while the molybdenum and tungsten content give good resistance to reducing media. This nickel steel alloy also has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chlorine ions. Other corrosives Hastelloy C-22 has resistance to are oxidizing acid chlorides, wet chlorine, formic and acetic acids, ferric and cupric chlorides, sea water, brine and many mixed or contaminated chemical solutions, both organic and inorganic. This nickel alloy also offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams. This is beneficial in multi- purpose plants where such “upset” conditions occur frequently.

This nickel alloy resists the formation of grain-boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in the as-welded condition.

Alloy C-22 should not be used in service temperatures above 1250° F due to the formation of detrimental phases which form above this temperature.

In what forms is Hastelloy C22 Available at Harsh Steel?

  • Hastelloy C-22 Sheet
  • Hastelloy C-22 Plate
  • Hastelloy C-22 Bar
  • Hastelloy C-22 Pipe & Tube (welded & seamless)
  • Hastelloy C-22 Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks
    socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
  • Hastelloy C-22 Wire

What are the characteristics of Hastelloy C22?

  • Resistant to pitting, crevice corrosion and stress corrosion cracking
  • Outstanding resistance to both reducing and oxidizing media
  • Excellent resistance to oxidizing aqueous media
  • Exceptional resistance to a wide variety of chemical process environments
    including strong oxidizers such as ferric acids, acetic anhydride, and seawater and brine solutions
  • Resists the formation of grain-boundary precipitates in the weld heat-affected zone
  • Excellent weldability

Technical Data Sheet

Chemical Composition Limits
Weight% Ni Cr Mo Fe W Co V C Mn S Si P
Nickel Alloy 22 Bal 20-22 12.5-14.5 2-6 2.5-3.5 2.5 max 0.35 max 0.015 max 0.50 max 0.02 max 0.08 max 0.02 max

Alloy 22 (UNS N06022) is the most versatile Nickel-Chromium-Molybdenum-Tungsten alloy with controlled Iron. Due to Alloy 22's content this alloy exhibits excellent resistance to both oxidising and reducing acid environments as well as those containing mixed acids. Alloy 22 is particularly useful for resistance to pitting and crevice corrosion in acid-halide environments. Alloy 22 is used in pickling chlorination, sulphonation plants, pollution control, chemical processing, marine and nuclear fuel reprocessing.

Typical Mechanical Properties

Material Yield Strength (0.2% Offset) Tensile Strength Elongation (%)
ksi MPa ksi MPa
Alloy 22 Bar 55 379 115 793 60


Nickel Alloy 22 Bar ASTM B574, ASTM B462, DIN 17752, ISO 9724, ISO 9723
Nickel Alloy 22 Plate ASTM B 575
Nickel Alloy 22 Sheet ASTM B 575, ASTM B906, ASME SB 575 ASME SB 906, ASME Code Case 2226, ISO 6208, DIN 17750
Nickel Alloy 22 Strip ASTM B 575, ASTM B906, ASME SB 575 ASME SB 906, ASME Code Case 2226, ISO 6208, DIN 17750
Nickel Alloy 22 Wire ASTM B574, DIN 17753
Nickel Alloy 22 Forging ASTM B564, ASTM SB564, DIN 17754
Nickel Alloy 22 Pipe Seamless Pipe ASTM B622, Weld Pipe ASTM B619, ASTM B775
Nickel Alloy 22 Tube Seamless Tube, ASTM B622, ASTM B829, Weld Tube ASTM B626, DIN 17751, ISO 6207
Nickel Alloy 22 Fitting ASTM B366, ASME SB366
Nickel Alloy 22 Other UNS N06022, Werkstoff Nr 2.4602

Harsh Steel export Nickel Alloy 28 to below countries.

Harsh steel is a major stockist and Exporter of Alloy 28 to many countries of the world such as Singapore, Brisbane, Sydney, Melbourne, Australia, Houston, TX, San Diego, San Francisco, Atlanta, USA, Brentford, United Kingdom, Phoenix, Ireland, New Zealand and Canada, Western Australia , Queensland, New South Wales, South Australia, Victoria, Australian Capital Territory, Tasmania, Northern Territory, Ontario, British Columbia, Yukon Territory, Alberta, Manitoba, Saskatchewan, Newfoundland, Prince Edward Island, New Brunswick, Nova Scotia, Eastern Cape, Gauteng, Kwazulu-Natal, Western Cape, England, Scotland, Wales, Northern Ireland, Lagos, Abuja Capital Territory, Vadodara, Mumbai, Chennai, New Delhi, Mahape, Gurgaon, Noida, Bangalore, Coimbatore, Cochin, Ash Sharqiyah, Ar Riyad, Makkah, Dhahran, Riyadh, Jiddah, Jeddah, Masqat, Kwazulu-Natal, Gauteng, Western Cape, Free State, Eastern Cape, Alberta, Saskatchewan, British Columbia, Newfoundland, New Brunswick, Manitoba, Ontario, Nova Scotia, Quebec, Calgary, Edmonton, Vancouver, Toronto, Birmingham, Brentford, Manchester, Bristol, Sheffield, Milton Keynes, London, Poplar, Edinburgh, Thames Ditton.

Enquiry for Alloy 22 / Hastelloy C-22 (UNS N06022) Werkstoff 2.4602