Hastelloy® C-4 alloy

UNS N06455
W.Nr 2.4610


Chemical processing, nuclear fuel processing, marine applications.


Hastelloy® C-4 alloy is a nickel-chromium-molybdenum alloy with excellent resistance to stress-corrosion cracking and to oxidizing atmospheres at high temperature. It has virtually the same corrosion resistance as C-276. It exhibits exceptional resistance to a wide variety of chemical process environments.

Nominal Composition

C: 0.015 max
Mn: 1.0 max
Si: 0.08 max
P: 0.040 max
S: 0.030 max
Cr: 14.0 - 18.0
Ci: 2.0 max
Mo: 14.0 - 17.0 
Ti: 0.70 max
Fe: 3.0 max
Ni: Balance

Physical Properties

Density: 0.312 lb/in3, (8.64 g/cm3)

Modulus of Elasticity (E): 
At 70°F (20°C): 30.8 x 103 ksi (211GPa)

Modulus of Rigidity (G): 
At 70°F (20°C): 11.4 x 103 ksi (78.6 GPa)

Coefficient of Expansion:
7.4 µin/in.-°F (70°F to 1000°F)
13.3 µm/m-°C (20°C to 538°C)

Electrical Resistivity: 49.1 µΩ.in, (1.25 µΩ.cm)

Thermal Conductivity: 70.0 Btu-in/ft2hr-°F, (10.1 W/m-K)

Applicable Specifications

Strip: ASTM B575, NACE MR0175

Typical Mechanical Properties

  • Annealed
    • Heat Treatment: 1950°F (1065°C)
    • Tensile Strength: 100 ksi (690 MPa) min - 125 ksi (860 MPa) typ
    • Suggested Operating Conditions: -300°F to 750°F (-184°C to 400°C)

  • Hastelloy® is a registered trademark of Haynes International, Inc.

    For further information Contact:

    Email: stripinfo@elgiloy.com
    Phone: 1 888 843 2350 
    Elgiloy Specialty Metals - Strip Products
    1565 Fleetwood Dr.
    Elgin, IL 60123 USA