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Solder Alloy 703 vs. CR024A Copper

Solder alloy 703 belongs to the otherwise unclassified metals classification, while CR024A copper belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is solder alloy 703 and the bottom bar is CR024A copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
120
Elongation at Break, % 35
15
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 19
43
Tensile Strength: Ultimate (UTS), MPa 57
230

Thermal Properties

Latent Heat of Fusion, J/g 61
210
Melting Completion (Liquidus), °C 220
1090
Melting Onset (Solidus), °C 220
1040
Specific Heat Capacity, J/kg-K 220
390
Thermal Conductivity, W/m-K 55
370
Thermal Expansion, µm/m-K 22
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
100
Electrical Conductivity: Equal Weight (Specific), % IACS 17
100

Otherwise Unclassified Properties

Density, g/cm3 7.4
9.0
Embodied Carbon, kg CO2/kg material 18
2.6
Embodied Energy, MJ/kg 300
41

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.2
Stiffness to Weight: Bending, points 17
18
Strength to Weight: Axial, points 2.1
7.1
Strength to Weight: Bending, points 4.4
9.3
Thermal Diffusivity, mm2/s 33
110
Thermal Shock Resistance, points 3.7
8.1

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.1
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.050
99.9 to 99.985
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0
Lead (Pb), % 0 to 0.070
0
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0
0.015 to 0.040
Silver (Ag), % 3.3 to 3.7
0 to 0.015
Tin (Sn), % 95.8 to 96.7
0
Zinc (Zn), % 0 to 0.0010
0