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CR021A Copper vs. Solder Alloy 704

CR021A copper belongs to the copper alloys classification, while solder alloy 704 belongs to the otherwise unclassified metals. 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 CR021A copper and the bottom bar is solder alloy 704.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
51
Elongation at Break, % 15
30
Poisson's Ratio 0.34
0.36
Shear Modulus, GPa 43
19
Tensile Strength: Ultimate (UTS), MPa 230
55

Thermal Properties

Latent Heat of Fusion, J/g 210
62
Melting Completion (Liquidus), °C 1090
240
Melting Onset (Solidus), °C 1040
220
Specific Heat Capacity, J/kg-K 390
220
Thermal Conductivity, W/m-K 380
50
Thermal Expansion, µm/m-K 17
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 98
13
Electrical Conductivity: Equal Weight (Specific), % IACS 99
15

Otherwise Unclassified Properties

Density, g/cm3 9.0
7.5
Embodied Carbon, kg CO2/kg material 2.6
19
Embodied Energy, MJ/kg 41
320

Common Calculations

Stiffness to Weight: Axial, points 7.2
3.8
Stiffness to Weight: Bending, points 18
17
Strength to Weight: Axial, points 7.1
2.1
Strength to Weight: Bending, points 9.3
4.3
Thermal Diffusivity, mm2/s 110
30
Thermal Shock Resistance, points 8.1
3.5

Alloy Composition

Aluminum (Al), % 0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.1
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0 to 0.00050
0 to 0.1
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 99.95 to 99.998
0 to 0.050
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0
0 to 0.020
Lead (Pb), % 0 to 0.0050
0 to 0.070
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0.0020 to 0.0070
0
Silver (Ag), % 0 to 0.015
4.8 to 5.2
Tin (Sn), % 0
94.3 to 95.2
Zinc (Zn), % 0
0 to 0.0010