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Solder Alloy 703 vs. Solder Alloy 301

Both solder alloy 703 and solder alloy 301 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 42% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is solder alloy 703 and the bottom bar is solder alloy 301.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 15
23
Elastic (Young's, Tensile) Modulus, GPa 51
40
Elongation at Break, % 35
51
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 19
15
Tensile Strength: Ultimate (UTS), MPa 57
55

Thermal Properties

Latent Heat of Fusion, J/g 61
55
Melting Completion (Liquidus), °C 220
140
Melting Onset (Solidus), °C 220
140
Specific Heat Capacity, J/kg-K 220
160
Thermal Conductivity, W/m-K 55
19
Thermal Expansion, µm/m-K 22
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 17
4.9

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.7
Embodied Carbon, kg CO2/kg material 18
13
Embodied Energy, MJ/kg 300
210

Common Calculations

Stiffness to Weight: Axial, points 3.8
2.5
Stiffness to Weight: Bending, points 17
13
Strength to Weight: Axial, points 2.1
1.8
Strength to Weight: Bending, points 4.4
3.7
Thermal Diffusivity, mm2/s 33
13
Thermal Shock Resistance, points 3.7
7.2

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0 to 0.1
0 to 0.1
Arsenic (As), % 0 to 0.030
0 to 0.030
Bismuth (Bi), % 0 to 0.1
56.5 to 59
Cadmium (Cd), % 0 to 0.0020
0 to 0.0020
Copper (Cu), % 0 to 0.050
0 to 0.050
Gold (Au), % 0 to 0.050
0 to 0.050
Indium (In), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0 to 0.020
0 to 0.020
Lead (Pb), % 0 to 0.070
0 to 0.070
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 3.3 to 3.7
0 to 0.1
Tin (Sn), % 95.8 to 96.7
41 to 43
Zinc (Zn), % 0 to 0.0010
0 to 0.0010