Wire – Hastelloy C-22

Wire – Hastelloy C-22

Hastelloy® C-22

UNS N06022
W.Nr 2.4602


Springs, fasteners, seals, medical devices, and components used in flue gas equipment.


Hastelloy® alloy C-22 is a Nickel-Chromium-Molybdenum alloy with excellent corrosion resistance to a wide variety of environments.  It is also resistant to oxidation, pitting, crevice corrosion, intergranular attack,and stress corrosion cracking.

Industries Supplied

Chemical Processing, Oil & Gas Extraction, and Power Generation.

Nominal Composition

Cr: 20.0 – 22.5
Mo: 12.5  – 14.5
Fe: 2.0 – 6.0
W: 2.5 to 3.5
Co: 2.5 max
Ni: balance
V: 0.35 max
C: 0.015 max
Mn: 0.50 max
S: 0.02 max
Si: 0.08 max

Physical Properties

Density: 0.311 lb/in3, (8.61 g/cm3)

Modulus of Elasticity (E):
At 70°F (20°C): 29.9 x 103 ksi (206 GPa)

Modulus of Rigidity (G):
At 70°F (20°C): 11.4 x 103 ksi (79 GPa)

Coefficient of Expansion:
7 µin/in.-°F (70°F to 600°F)
12.6 µm/m-°C (20°C to 300°C)

Electrical Resistivity: 44.8 µΩ.in, (114 µΩ.cm)

Thermal Conductivity: 91 Btu-in/ft2hr-°F, (13.2 W/m-K)

Applicable Specifications

Wire & Bar: ASTM B574, AWS A5.14, NACE MR0175 (ISO 15156-3)

Typical Mechanical Properties – Spring Applications

  • Annealed
    • Heat Treatment: 2048°F (1120°C)
    • Tensile Strength: 110 – 150 ksi; (758-1034 MPa)
    • Suggested Operating Conditions: -330°F to 750°F (-200°C to 400°C)
  • Spring Temper
    • Tensile Strength: 200 – 240 ksi; (1379 – 1655 MPa)
    • Suggested Operating Conditions: -330°F to 750°F (-200°C to 400°C​)

Hastelloy® is a registered trade mark of Haynes International, Inc..

For further information Contact:

Contact Us
Phone: 1 847 695 1900
Elgiloy Specialty Metals – Wire Products
356 N.Cross Street
Sycamore, IL 60178 USA

Limitation of Liability and Disclaimer of Warranty:

  • The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only.  It is not intended for engineering or design.
  • Applications may be discussed, however, Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, does not recommend or endorse any material for any particular end use or application.
  • The data included in this data sheet are typical values and may vary.
  • Elgiloy Specialty Metals, a Division of Combined Metals Company LLC, makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.

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

If you need wire to work in highly corrosive or extreme temperature situations, consider utilizing HASTELLOY® C-22® wire for the job. The Nickel-Chromium-Molybdenum-Tungsten alloy is one of the most corrosion resistant alloys on the market and can withstand almost any extreme circumstance it is needed to perform in. Furthermore, besides general corrosion, it is also resistant to pitting and stress corrosion cracking. It can withstand very high temperatures such as when sulfur is present in a coal power production plant, and can withstand corrosion where solid waste might be found such as a boiler or containment unit.

HASTELLOY® C-22® wire alloy is very weldable and easily formed. It does not matter if you are using a gas tungsten arc, a shielded metal, or gas metal arc, this alloy can adapt to any method. This is because it naturally prevents the development of grain boundary precipitates. This is not always the case with other alloys, which makes C-22® very versatile, and the ideal wire for situations where an irregularly shaped device must be used in an area that would be too corrosive for normal wiring.The practical uses for HASTELLOY® C-22® alloy include areas where nitric, formic and ferric acids are present. Also areas that may have wet or cupric chlorides which will normally destroy other alloys in a relatively short period of time. This is why industries such as chemical processing, sea water industrial equipment, and nuclear fuel processing use HASTELLOY® C-22® for many of their wiring needs. These industries cannot afford to have wiring fail due to the extreme nature of the environment which is extremely hazardous for humans to do maintenance in.

However, with C-22®, these concerns go out the window.The element that sets C-22® apart from other alloys is the trace amounts of Vanadium in the wire itself. Vanadium is often used to enhance the properties that most metals already show. Therefore, one you are dealing with one of the 12 corrosion-resistant alloys under the Hastelloy® brand, all of which show enhanced levels of corrosion resistance, the Vanadium combines with the Nickel, Chromium, Molybdenum, and Tungsten to make an alloy that takes this characteristic to extreme levels.