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ASTM B631 Class C vs. Solder Alloy 704

Both ASTM B631 class C and solder alloy 704 are otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM B631 class C and the bottom bar is solder alloy 704.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180 to 190
51
Poisson's Ratio 0.32
0.36
Shear Modulus, GPa 66 to 71
19

Thermal Properties

Latent Heat of Fusion, J/g 140 to 150
62
Melting Completion (Liquidus), °C 2090 to 2230
240
Specific Heat Capacity, J/kg-K 180
220
Thermal Conductivity, W/m-K 450 to 490
50
Thermal Expansion, µm/m-K 14
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 55 to 63
13
Electrical Conductivity: Equal Weight (Specific), % IACS 36 to 43
15

Otherwise Unclassified Properties

Density, g/cm3 13 to 14
7.5
Embodied Carbon, kg CO2/kg material 55 to 59
19
Embodied Energy, MJ/kg 860 to 920
320

Common Calculations

Stiffness to Weight: Axial, points 7.4 to 7.6
3.8
Stiffness to Weight: Bending, points 14
17
Thermal Diffusivity, mm2/s 180 to 200
30