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Solder Alloy 503 vs. CR021A Copper

Solder alloy 503 belongs to the otherwise unclassified metals classification, while CR021A copper belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is solder alloy 503 and the bottom bar is CR021A copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 54
120
Elongation at Break, % 30
15
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 20
43
Tensile Strength: Ultimate (UTS), MPa 57
230

Thermal Properties

Latent Heat of Fusion, J/g 69
210
Melting Completion (Liquidus), °C 380
1090
Melting Onset (Solidus), °C 220
1040
Specific Heat Capacity, J/kg-K 230
390
Thermal Conductivity, W/m-K 61
380
Thermal Expansion, µm/m-K 22
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
98
Electrical Conductivity: Equal Weight (Specific), % IACS 17
99

Otherwise Unclassified Properties

Density, g/cm3 7.5
9.0
Embodied Carbon, kg CO2/kg material 16
2.6
Embodied Energy, MJ/kg 270
41

Common Calculations

Stiffness to Weight: Axial, points 4.1
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 35
110
Thermal Shock Resistance, points 3.5
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 0.080
0 to 0.00050
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 5.5 to 6.5
99.95 to 99.998
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 to 0.0050
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0
0.0020 to 0.0070
Silver (Ag), % 1.8 to 2.2
0 to 0.015
Tin (Sn), % 90.8 to 92.7
0
Zinc (Zn), % 0 to 0.0010
0