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CR012A Copper vs. Solder Alloy 121

CR012A copper belongs to the copper alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. There are 24 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is CR012A copper and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
21
Elongation at Break, % 15
25
Poisson's Ratio 0.34
0.43
Shear Modulus, GPa 43
7.5
Tensile Strength: Ultimate (UTS), MPa 220
32

Thermal Properties

Latent Heat of Fusion, J/g 210
29
Melting Completion (Liquidus), °C 1090
290
Melting Onset (Solidus), °C 1040
230
Specific Heat Capacity, J/kg-K 390
140
Thermal Conductivity, W/m-K 390
31
Thermal Expansion, µm/m-K 17
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 100
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 100
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 33
80
Density, g/cm3 9.0
11
Embodied Carbon, kg CO2/kg material 2.7
5.6
Embodied Energy, MJ/kg 42
93
Embodied Water, L/kg 360
580

Common Calculations

Stiffness to Weight: Axial, points 7.2
1.1
Stiffness to Weight: Bending, points 18
8.6
Strength to Weight: Axial, points 6.8
0.84
Strength to Weight: Bending, points 9.0
2.1
Thermal Diffusivity, mm2/s 110
20
Thermal Shock Resistance, points 7.8
3.9

Alloy Composition

Aluminum (Al), % 0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.5
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0 to 0.00050
0 to 0.25
Cadmium (Cd), % 0
0 to 0.0050
Copper (Cu), % 99.85 to 99.94
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0
0 to 0.020
Lead (Pb), % 0
83.4 to 85.5
Nickel (Ni), % 0
0 to 0.010
Oxygen (O), % 0 to 0.040
0
Silver (Ag), % 0.060 to 0.080
0 to 0.1
Tin (Sn), % 0
14.5 to 15.5
Zinc (Zn), % 0
0 to 0.0010