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ASTM B628 Ag-Cu vs. C70260 Copper

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while C70260 copper belongs to the copper alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is ASTM B628 Ag-Cu and the bottom bar is C70260 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
120
Elongation at Break, % 1.1 to 17
9.5 to 19
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 31
44
Shear Strength, MPa 210 to 430
320 to 450
Tensile Strength: Ultimate (UTS), MPa 350 to 760
520 to 760

Thermal Properties

Latent Heat of Fusion, J/g 140
220
Melting Completion (Liquidus), °C 780
1060
Melting Onset (Solidus), °C 780
1040
Specific Heat Capacity, J/kg-K 280
390
Thermal Expansion, µm/m-K 19
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 84
40 to 50
Electrical Conductivity: Equal Weight (Specific), % IACS 75
40 to 51

Otherwise Unclassified Properties

Density, g/cm3 10
8.9

Common Calculations

Stiffness to Weight: Axial, points 4.6
7.3
Stiffness to Weight: Bending, points 14
18
Strength to Weight: Axial, points 9.5 to 21
16 to 24
Strength to Weight: Bending, points 11 to 18
16 to 21
Thermal Shock Resistance, points 16 to 34
18 to 27

Alloy Composition


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Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 26.6 to 29
95.8 to 98.8
Iron (Fe), % 0 to 0.050
0
Lead (Pb), % 0 to 0.030
0
Nickel (Ni), % 0 to 0.010
1.0 to 3.0
Phosphorus (P), % 0 to 0.030
0 to 0.010
Silicon (Si), % 0
0.2 to 0.7
Silver (Ag), % 71 to 73
0
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.21
0 to 0.5