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ASTM B628 Ag-Cu vs. C90200 Bronze

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while C90200 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 (12, in this case) are not shown.

For each property being compared, the top bar is ASTM B628 Ag-Cu and the bottom bar is C90200 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
110
Elongation at Break, % 1.1 to 17
30
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 31
41
Tensile Strength: Ultimate (UTS), MPa 350 to 760
260

Thermal Properties

Latent Heat of Fusion, J/g 140
200
Melting Completion (Liquidus), °C 780
1050
Melting Onset (Solidus), °C 780
880
Specific Heat Capacity, J/kg-K 280
370
Thermal Expansion, µm/m-K 19
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 84
13
Electrical Conductivity: Equal Weight (Specific), % IACS 75
13

Otherwise Unclassified Properties

Density, g/cm3 10
8.8

Common Calculations

Stiffness to Weight: Axial, points 4.6
7.0
Stiffness to Weight: Bending, points 14
18
Strength to Weight: Axial, points 9.5 to 21
8.3
Strength to Weight: Bending, points 11 to 18
10
Thermal Shock Resistance, points 16 to 34
9.5

Alloy Composition


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Aluminum (Al), % 0 to 0.0050
0 to 0.0050
Antimony (Sb), % 0
0 to 0.2
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 26.6 to 29
91 to 94
Iron (Fe), % 0 to 0.050
0 to 0.2
Lead (Pb), % 0 to 0.030
0 to 0.3
Nickel (Ni), % 0 to 0.010
0 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.050
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 71 to 73
0
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
6.0 to 8.0
Zinc (Zn), % 0 to 0.060
0 to 0.5
Residuals, % 0 to 0.21
0 to 0.6