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ASTM B628 Ag-Cu vs. C87700 Bronze

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while C87700 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 C87700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
110
Elongation at Break, % 1.1 to 17
3.6
Poisson's Ratio 0.36
0.33
Shear Modulus, GPa 31
42
Tensile Strength: Ultimate (UTS), MPa 350 to 760
300

Thermal Properties

Latent Heat of Fusion, J/g 140
250
Melting Completion (Liquidus), °C 780
980
Melting Onset (Solidus), °C 780
900
Specific Heat Capacity, J/kg-K 280
400
Thermal Expansion, µm/m-K 19
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 84
45
Electrical Conductivity: Equal Weight (Specific), % IACS 75
48

Otherwise Unclassified Properties

Density, g/cm3 10
8.5

Common Calculations

Stiffness to Weight: Axial, points 4.6
7.4
Stiffness to Weight: Bending, points 14
19
Strength to Weight: Axial, points 9.5 to 21
9.8
Strength to Weight: Bending, points 11 to 18
12
Thermal Shock Resistance, points 16 to 34
11

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0
0 to 0.1
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 26.6 to 29
87.5 to 90.5
Iron (Fe), % 0 to 0.050
0 to 0.5
Lead (Pb), % 0 to 0.030
0 to 0.090
Manganese (Mn), % 0
0 to 0.8
Nickel (Ni), % 0 to 0.010
0 to 0.25
Phosphorus (P), % 0 to 0.030
0 to 0.15
Silicon (Si), % 0
2.5 to 3.5
Silver (Ag), % 71 to 73
0
Tin (Sn), % 0
0 to 2.0
Zinc (Zn), % 0 to 0.060
7.0 to 9.0
Residuals, % 0
0 to 0.8