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Solder Alloy 704 vs. ASTM B631 Class B

Both solder alloy 704 and ASTM B631 class B 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 solder alloy 704 and the bottom bar is ASTM B631 class B.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
210
Poisson's Ratio 0.36
0.31
Shear Modulus, GPa 19
78 to 79

Thermal Properties

Latent Heat of Fusion, J/g 62
150
Melting Completion (Liquidus), °C 240
2460 to 2480
Specific Heat Capacity, J/kg-K 220
170
Thermal Conductivity, W/m-K 50
450
Thermal Expansion, µm/m-K 22
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
50 to 53
Electrical Conductivity: Equal Weight (Specific), % IACS 15
32 to 34

Otherwise Unclassified Properties

Density, g/cm3 7.5
14
Embodied Carbon, kg CO2/kg material 19
49
Embodied Energy, MJ/kg 320
760

Common Calculations

Stiffness to Weight: Axial, points 3.8
8.1
Stiffness to Weight: Bending, points 17
14
Thermal Diffusivity, mm2/s 30
190