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Every metal has its design limitations, and Hastelloy® C-22® provides a corrosion-resistant solution where many other materials have failed. This property, combined with its commercial availability, makes it an excellent choice for demanding specifications.


Hastelloy C-22 is extremely resistant to corrosion in oxidizing and reducing environments. C-22 has shown an outstanding resistance to a wide range of chemicals, including chlorides, organic and inorganic solutions.

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Chemical Composition of Hastelloy C-22

Hastelloy C-22 is the most adaptable nickel alloy in the Hastelloy C category. It typically contains 22% chromium, 13% molybdenum, and less than 3% iron.



Nickel56.00 (As Balanced)
Cobalt2.5 max.
Silicon0.08 max.
Manganese0.50 max.
Carbon0.015 max.
Copper0.5 max.
Vanadium0.35 max.
Phosphorous0.02 max.
Sulfur0.02 max.

Alloy Chemical Comparison

Hastelloy C22

(UNS N06022)


(UNS N10276)


(UNS N06455)

Alloy 625

(UNS N06625)

% Nickel56.00 (As Balance)57.00 (As Balance)65.00 (As Balance)62.00 (As Balance)
% Cobalt2.5 max.2.5 max.2 max.1 max.
% Chromium20.0-22.516.016.021.0
% Molybdenum12.5-14.516.016.09.0
% Tungsten34--
% Iron (Fe)2.0-6.053.05 max.
% Silicon0.08 max.0.08 max.0.08 max.0.5 max.
% Manganese0.5 max.1.0 max.1.0 max0.5 max.
% Carbon0.015 max.0.01 max.0.01 max.0.1 max.
% Vanadium0.35 max.0.35 max.--
% Phosphorous0.02 max.0.0250.025-
% Sulfur0.02 max.0.010 max.0.01 max.-
% Niobium---3.7
% Titanium--0.7 max.0.4 max.
% Aluminum---0.4 max.
% Copper0.5 max.0.5 max.0.5 max.-

Physical Properties of Hastelloy C-22

Superior physical properties such as ductility, durability, thermal conductivity, and hardness make Hastelloy C-22 a prime choice for fabrication.

Density0.314 lb/in
8.69 g/cm3
Modulus of Elasticity30.3 x 106 psi
209 GPa
Melting Range2475 – 2550°F
1357 – 1399°C
Thermal Conductivity

7.7 Btu/hr • ft • °F
11.1 W/mK
Mean Coefficient of Thermal Expansion
75 to 200°F
24 to 93°C

6.9 μm/in.-°F
12.4 μm/m.°C
Specific Heat Capacity0.099 Btu/lb.-°F
414 J/Kg-K
Electrical Resistivity730.7 µΩm•circ mil/ft
1.215 µΩm
Magnetic Permeability
at 200 oersted (15.9 kA/m)