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ASTM B631 Class A vs. ASTM B780 Alloy

Both ASTM B631 class A and ASTM B780 alloy are otherwise unclassified metals. There are 11 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class A and the bottom bar is ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
83
Poisson's Ratio 0.3
0.36
Shear Modulus, GPa 85 to 86
30

Thermal Properties

Latent Heat of Fusion, J/g 160
140
Specific Heat Capacity, J/kg-K 160
270
Thermal Expansion, µm/m-K 11
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40 to 47
70 to 76
Electrical Conductivity: Equal Weight (Specific), % IACS 25 to 29
62 to 68

Otherwise Unclassified Properties

Density, g/cm3 15
10

Common Calculations

Stiffness to Weight: Axial, points 8.5
4.5
Stiffness to Weight: Bending, points 14
14