Hastelloy® C-22 (Alloy C-22) Wire UNS N06022

Alloy C-22 is nickel-chromium-molybdenum-tungsten alloy with improved resistance to both uniform and localized corrosion as well to a wide variety of mixed industrial chemicals.

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Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated ASTM B574, ASTM B575

Hastelloy® C-22 and Alloy C-22 Description

Alloy C-22 is nickel-chromium-molybdenum-tungsten alloy with improved resistance to both uniform and localized corrosion as well to a wide variety of mixed industrial chemicals. Alloy C-22 alloy exhibits superior weldability and alloy C-22 weld fillers are used to join other corrosion resistant alloys such as Alloy C-276 and AL-6XN® alloy.


Flue gas scrubber components
Nuclear fuel reprocessing
Sour gas production components
Pesticide production components

Chemistry Typical

Nickel: Balance
Chromium: 20.00 – 22.50
Molybdenum: 12.50 – 14.50
Iron: 2.00 – 6.00
Tungsten: 2.50 – 3.00
Cobalt: 2.50 max
Carbon: 0.10 max
Silicon: 0.08 max
Manganese: 0.50 max
Phosphorus: 0.02 max
Vanadium: 0.35 max

Physical Properties

Density: 0.314 lbs/in³ 8, 8.69 g/cm³

Mean Coefficient of Thermal Expansion: in/in/°F (mm/m/°C): 70-212°F (20-100°C): 6.9 x 10-612.4)

Thermal Conductivity: BTU-in/h-ft-°F (W/m-°K):
70°F (21°C): 70(10.1)

Modulus of Elasticity: KSI (MPa)
29.9 x 10³ (206 x 10³) in tension

Melting Point: 2550°F (1400°C)

Mechanical Properties at Room Temperature

Annealed Typical

Ultimate Tensile Strength: 100 KSI min (690 MPa min)
Yield Strength: (0.2% offset) 45 KSI min (310 MPa min)
Elongation: 45% min
Hardness: Rb 100 max (aim)

Properties Tempered

Alloy C-22 can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.

Additional Properties

Corrosion Resistance

Refer to NACE (National Association of Corrosion Engineers) for recommendations.

Standard Wire Finishes

Extra Clean: (XC) Extra clean is also referred to as “bright annealed” or “bright annealed and cold rolled”
Grease (round wire only): Drawn in a heavy grease produces an “Ultra bright” finish for decorative applications
Soap (round wire only): Soap is used as a lubricant in the drawing process and is not removed. It acts as a lubricant during customer part forming operation. A soap finish is available in tempered products.
Plated: Many plating options are available.
∗Special finishes are available: Contact Ulbrich Wire Sales with special finish and plating requests.


Continuous Coils
Cut to lengths
Precision cutting

Heat Treatment

Alloy C-22 cannot be hardened heat treating


For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”

∗Hastelloy ®C-22 is a registered alloy of Haynes Alloys

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels and Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the ‘applications’ noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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