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ASTM B628 Ag-Cu vs. C42500 Brass

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while C42500 brass 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 (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 C42500 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
110
Elongation at Break, % 1.1 to 17
2.0 to 49
Poisson's Ratio 0.36
0.33
Shear Modulus, GPa 31
42
Shear Strength, MPa 210 to 430
220 to 360
Tensile Strength: Ultimate (UTS), MPa 350 to 760
310 to 630

Thermal Properties

Latent Heat of Fusion, J/g 140
200
Melting Completion (Liquidus), °C 780
1030
Melting Onset (Solidus), °C 780
1010
Specific Heat Capacity, J/kg-K 280
380
Thermal Expansion, µm/m-K 19
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 84
28
Electrical Conductivity: Equal Weight (Specific), % IACS 75
29

Otherwise Unclassified Properties

Density, g/cm3 10
8.7

Common Calculations

Stiffness to Weight: Axial, points 4.6
7.1
Stiffness to Weight: Bending, points 14
18
Strength to Weight: Axial, points 9.5 to 21
9.9 to 20
Strength to Weight: Bending, points 11 to 18
12 to 19
Thermal Shock Resistance, points 16 to 34
11 to 22

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
87 to 90
Iron (Fe), % 0 to 0.050
0 to 0.050
Lead (Pb), % 0 to 0.030
0 to 0.050
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.030
0 to 0.35
Silver (Ag), % 71 to 73
0
Tin (Sn), % 0
1.5 to 3.0
Zinc (Zn), % 0 to 0.060
6.1 to 11.5
Residuals, % 0 to 0.21
0 to 0.5