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ASTM B631 Class A vs. ASTM B541 Gold

Both ASTM B631 class A and ASTM B541 gold are otherwise unclassified metals. There are 12 material properties with values for both materials. Properties with values for just one material (16, 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 B541 gold.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Poisson's Ratio 0.3
0.4
Shear Modulus, GPa 85 to 86
38

Thermal Properties

Latent Heat of Fusion, J/g 160
90
Melting Completion (Liquidus), °C 2680 to 2690
1110
Specific Heat Capacity, J/kg-K 160
170
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40 to 47
7.7 to 12
Electrical Conductivity: Equal Weight (Specific), % IACS 25 to 29
4.0 to 6.2

Otherwise Unclassified Properties

Density, g/cm3 15
17

Common Calculations

Stiffness to Weight: Axial, points 8.5
3.4
Stiffness to Weight: Bending, points 14
9.0