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CR021A Copper vs. AWS BAg-8a

CR021A copper belongs to the copper alloys classification, while AWS BAg-8a belongs to the otherwise unclassified metals. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 15 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is CR021A copper and the bottom bar is AWS BAg-8a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
83
Poisson's Ratio 0.34
0.36
Shear Modulus, GPa 43
31
Tensile Strength: Ultimate (UTS), MPa 230
150

Thermal Properties

Latent Heat of Fusion, J/g 210
140
Melting Completion (Liquidus), °C 1090
770
Melting Onset (Solidus), °C 1040
770
Specific Heat Capacity, J/kg-K 390
290
Thermal Expansion, µm/m-K 17
19

Otherwise Unclassified Properties

Density, g/cm3 9.0
10

Common Calculations

Stiffness to Weight: Axial, points 7.2
4.6
Stiffness to Weight: Bending, points 18
15
Strength to Weight: Axial, points 7.1
4.2
Strength to Weight: Bending, points 9.3
6.3
Thermal Shock Resistance, points 8.1
6.7

Alloy Composition

Bismuth (Bi), % 0 to 0.00050
0
Copper (Cu), % 99.95 to 99.998
26.4 to 28.8
Lead (Pb), % 0 to 0.0050
0
Lithium (Li), % 0
0.25 to 0.5
Phosphorus (P), % 0.0020 to 0.0070
0
Silver (Ag), % 0 to 0.015
71 to 73
Residuals, % 0
0 to 0.15