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ASTM B631 Class B vs. Solder Alloy 124

Both ASTM B631 class B and solder alloy 124 are otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class B and the bottom bar is solder alloy 124.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
17
Poisson's Ratio 0.31
0.44
Shear Modulus, GPa 78 to 79
5.8

Thermal Properties

Latent Heat of Fusion, J/g 150
24
Melting Completion (Liquidus), °C 2460 to 2480
330
Specific Heat Capacity, J/kg-K 170
130
Thermal Conductivity, W/m-K 450
22
Thermal Expansion, µm/m-K 12
29

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 50 to 53
9.6
Electrical Conductivity: Equal Weight (Specific), % IACS 32 to 34
7.7

Otherwise Unclassified Properties

Density, g/cm3 14
11
Embodied Carbon, kg CO2/kg material 49
4.1
Embodied Energy, MJ/kg 760
68

Common Calculations

Stiffness to Weight: Axial, points 8.1
0.83
Stiffness to Weight: Bending, points 14
7.6
Thermal Diffusivity, mm2/s 190
15