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ASTM B628 Ag-Cu vs. C72900 Copper-nickel

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while C72900 copper-nickel 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 C72900 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
120
Elongation at Break, % 1.1 to 17
6.0 to 20
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 31
45
Shear Strength, MPa 210 to 430
540 to 630
Tensile Strength: Ultimate (UTS), MPa 350 to 760
870 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 140
210
Melting Completion (Liquidus), °C 780
1120
Melting Onset (Solidus), °C 780
950
Specific Heat Capacity, J/kg-K 280
380
Thermal Expansion, µm/m-K 19
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 84
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 75
8.0

Otherwise Unclassified Properties

Density, g/cm3 10
8.8

Common Calculations

Stiffness to Weight: Axial, points 4.6
7.6
Stiffness to Weight: Bending, points 14
19
Strength to Weight: Axial, points 9.5 to 21
27 to 34
Strength to Weight: Bending, points 11 to 18
23 to 27
Thermal Shock Resistance, points 16 to 34
31 to 38

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
74.1 to 78
Iron (Fe), % 0 to 0.050
0 to 0.5
Lead (Pb), % 0 to 0.030
0 to 0.020
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 0
0 to 0.3
Nickel (Ni), % 0 to 0.010
14.5 to 15.5
Niobium (Nb), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.030
0
Silver (Ag), % 71 to 73
0
Tin (Sn), % 0
7.5 to 8.5
Zinc (Zn), % 0 to 0.060
0 to 0.5
Residuals, % 0 to 0.21
0 to 0.3