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ASTM B628 Ag-Cu vs. CR007A Copper

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while CR007A 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 18 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ASTM B628 Ag-Cu and the bottom bar is CR007A copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
120
Elongation at Break, % 1.1 to 17
15
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 31
43
Tensile Strength: Ultimate (UTS), MPa 350 to 760
230

Thermal Properties

Latent Heat of Fusion, J/g 140
210
Melting Completion (Liquidus), °C 780
1090
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
100
Electrical Conductivity: Equal Weight (Specific), % IACS 75
100

Otherwise Unclassified Properties

Density, g/cm3 10
9.0

Common Calculations

Stiffness to Weight: Axial, points 4.6
7.2
Stiffness to Weight: Bending, points 14
18
Strength to Weight: Axial, points 9.5 to 21
7.1
Strength to Weight: Bending, points 11 to 18
9.3
Thermal Shock Resistance, points 16 to 34
8.1

Alloy Composition


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Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0
0 to 0.00040
Arsenic (As), % 0
0 to 0.00050
Bismuth (Bi), % 0
0 to 0.00020
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 26.6 to 29
99.994 to 100
Iron (Fe), % 0 to 0.050
0 to 0.0010
Lead (Pb), % 0 to 0.030
0 to 0.00050
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.030
0
Selenium (Se), % 0
0 to 0.00020
Silver (Ag), % 71 to 73
0 to 0.0025
Sulfur (S), % 0
0 to 0.0015
Tellurium (Te), % 0
0 to 0.00020
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.21
0