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ASTM A747 Grade CB7Cu-2 – Precipitation Hardened H900 Stainless Steel

Properties

General

Property	Temperature	Value	Comment
Density	23.0 °C	7.6 - 7.7 g/cm³	Typical for Martensitic Stainless Steel

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	23.0 °C	220 GPa	Typical for Martensitic Stainless Steel
Elongation A50	23.0 °C	5 %
Hardness, Brinell	23.0 °C	375 [-]
Hardness, Rockwell C	23.0 °C	40 [-]
Poisson's ratio	23.0 °C	0.3 [-]	Typical for Martensitic Stainless Steel
Shear modulus	23.0 °C	77 GPa	Typical for Martensitic Stainless Steel
Tensile strength	23.0 °C	1170 MPa
Yield strength Rp0.2	23.0 °C	1000 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	23.0 °C	1E-5 - 1.5E-5 1/K	Typical for Martensitic Stainless Steel
Melting point		1370 - 1530 °C	Typical for Martensitic Stainless Steel
Specific heat capacity	23.0 °C	460 J/(kg·K)	Typical for Martensitic Stainless Steel
Thermal conductivity	23.0 °C	14 - 31 W/(m·K)	Typical for Martensitic Stainless Steel

Electrical

Property	Temperature	Value	Comment
Electrical resistivity	23.0 °C	6E-7 Ω·m	Typical for Martensitic Stainless Steel

Chemical properties

Property	Value
Carbon	0.07 %
Chromium	14 - 15.5 %
Copper	2.5 - 3.2 %
Manganese	0.7 %
Nickel	4.5 - 5.5 %
Niobium	0.15 - 0.35 %
Nitrogen	0.05 %
Phosphorus	0.04 %
Silicon	1 %
Sulfur	0.03 %

ASTM A747 Grade CB7Cu-2 H1150 – Precision Precipitation-Hardened Stainless Steel ASTM A757 Grade E3N: Normalized & Tempered Martensitic Stainless Steel

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