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ASTM B631 Class B vs. S40975 Stainless Steel

ASTM B631 class B belongs to the otherwise unclassified metals classification, while S40975 stainless steel belongs to the iron alloys. There are 17 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class B and the bottom bar is S40975 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.31
0.28
Rockwell B Hardness 53 to 85
81
Shear Modulus, GPa 78 to 79
75

Thermal Properties

Latent Heat of Fusion, J/g 150
270
Melting Completion (Liquidus), °C 2460 to 2480
1450
Specific Heat Capacity, J/kg-K 170
480
Thermal Conductivity, W/m-K 450
26
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 50 to 53
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 32 to 34
3.3

Otherwise Unclassified Properties

Density, g/cm3 14
7.8
Embodied Carbon, kg CO2/kg material 49
2.0
Embodied Energy, MJ/kg 760
28

Common Calculations

Stiffness to Weight: Axial, points 8.1
14
Stiffness to Weight: Bending, points 14
25
Thermal Diffusivity, mm2/s 190
7.0