ASTM A487 Grade 7 Class A, Heat-Treated

Equivalent material: ASTM Grade 7, UNS G41400, ASTM 7, UNS K21903

ASTM A487 Grade 7 Class A, Heat-Treated general

Property Temperature Value Comment
Density 20.0 °C Density of 7.6 - 7.7 g/cm³ Typical for Martensitic Stainless Steel

ASTM A487 Grade 7 Class A, Heat-Treated thermal

Property Temperature Value Comment
Coefficient of thermal expansion 20.0 °C Coefficient of thermal expansion of 1E-5 - 1.5E-5 1/K Typical for Martensitic Stainless Steel
Melting point - Melting point of 1375 - 1450 °C Typical for Martensitic Stainless Steel
Specific heat capacity 20.0 °C Specific heat capacity of 460 J/(kg·K) Typical for Martensitic Stainless Steel
Thermal conductivity 20.0 °C Thermal conductivity of 14 - 31 W/(m·K) Typical for Martensitic Stainless Steel

ASTM A487 Grade 7 Class A, Heat-Treated chemical

Property Value
Boron Boron of 2E-3 - 6E-3 %
Carbon Carbon of 0.05 - 0.2 %
Copper Copper of 0.5 %
Manganese Manganese of 0.6 - 1 %
Molybdenum Molybdenum of 0.4 - 0.6 %
Phosphorus Phosphorus of 0.04 %
Silicon Silicon of 0.8 %
Sulfur Sulfur of 0.035 %
Tungsten Tungsten of 0.1 %

ASTM A487 Grade 7 Class A, Heat-Treated electrical

Property Temperature Value Comment
Electrical resistivity 20.0 °C Electrical resistivity of 6E-7 Ω·m Typical for Martensitic Stainless Steel

ASTM A487 Grade 7 Class A, Heat-Treated mechanical

Property Temperature Value Comment
Elastic modulus 20.0 °C Elastic modulus of 220 GPa Typical for Martensitic Stainless Steel
Elongation A50 20.0 °C Elongation A50 of 15 % -
Poisson's ratio 20.0 °C Poisson's ratio of 0.3 [-] Typical for Martensitic Stainless Steel
Reduction of area 20.0 °C Reduction of area of 30 % -
Tensile strength 20.0 °C Tensile strength of 795 MPa -
Yield Strength Rp0.2, short transverse 20.0 °C Yield Strength Rp0.2, short transverse of 690 MPa -

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