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ASTM B628 Ag-Cu vs. C87300 Bronze

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while C87300 bronze 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 C87300 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
120
Elongation at Break, % 1.1 to 17
22
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 31
43
Tensile Strength: Ultimate (UTS), MPa 350 to 760
350

Thermal Properties

Latent Heat of Fusion, J/g 140
280
Melting Completion (Liquidus), °C 780
970
Melting Onset (Solidus), °C 780
820
Specific Heat Capacity, J/kg-K 280
410
Thermal Expansion, µm/m-K 19
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 84
6.1
Electrical Conductivity: Equal Weight (Specific), % IACS 75
6.4

Otherwise Unclassified Properties

Density, g/cm3 10
8.6

Common Calculations

Stiffness to Weight: Axial, points 4.6
7.5
Stiffness to Weight: Bending, points 14
19
Strength to Weight: Axial, points 9.5 to 21
11
Strength to Weight: Bending, points 11 to 18
13
Thermal Shock Resistance, points 16 to 34
13

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
94 to 95.7
Iron (Fe), % 0 to 0.050
0 to 0.2
Lead (Pb), % 0 to 0.030
0 to 0.2
Manganese (Mn), % 0
0.8 to 1.5
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0
3.5 to 5.0
Silver (Ag), % 71 to 73
0
Zinc (Zn), % 0 to 0.060
0 to 0.25
Residuals, % 0 to 0.21
0 to 0.5