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ASTM B631 Class A vs. R05255 Alloy

Both ASTM B631 class A and R05255 alloy are otherwise unclassified metals. There are 11 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class A and the bottom bar is R05255 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.3
0.34
Shear Modulus, GPa 85 to 86
70

Thermal Properties

Latent Heat of Fusion, J/g 160
140
Specific Heat Capacity, J/kg-K 160
140
Thermal Conductivity, W/m-K 420
59
Thermal Expansion, µm/m-K 11
6.6

Otherwise Unclassified Properties

Density, g/cm3 15
17

Common Calculations

Stiffness to Weight: Axial, points 8.5
6.3
Stiffness to Weight: Bending, points 14
11
Thermal Diffusivity, mm2/s 180
25