AMPCO® 22 is a duplex structure alloy of approx. 50 % of each phase - gamma 2 and beta. It is remarkable because of its hardness, its excellent compression and wear resistance and by its sliding properties. As the elongation of the material is very low, thin sections should be avoided and the material should be well backed up.



Density ρ

7.06 g/cm³ at 20 °C


Compressive strength Rmc

1448 MPa at 20 °C

Compressive yield strength, 0.1% Rs,0.1

654 MPa at 20 °C

Elastic modulus E

103 GPa at 20 °C

Elongation A5 A5

0.5 % at 20 °C

Hardness, HBW HBW

331 [-] at 20 °C

HBW 10/3000

Hardness, Rockwell C HRC

35 [-] at 20 °C

Reduction of area Z

0 % at 20 °C

Shear strength τ

483 MPa at 20 °C

Tensile strength Rm

586 MPa at 20 °C

Yield strength Rp0.2 Rp0.2

489 MPa at 20 °C


Coefficient of thermal expansion α

1.62E-5 1/K at 20 °C

Specific heat capacity cp

420 J/(kg·K) at 20 °C

Thermal conductivity λ

42 W/(m·K) at 20 °C


Electrical conductivity σel

6.00E+6 S/m at 20 °C

Specific Electrical conductivity

10 % IACS

Chemical properties


Weight %






14.1 %


4.7 %


0.5 %

Technological properties

Application areas

The field of service of AMPCO® 22, with few exceptions, is limited to forming and/or drawing stainless steel, especially when runs are long or gauge is heavy and it is essential that tolerances be maintained.

This material data has been provided by AMPCO METAL.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.