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ASTM B628 Ag-Cu vs. C68300 Brass

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while C68300 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 17 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ASTM B628 Ag-Cu and the bottom bar is C68300 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
100
Elongation at Break, % 1.1 to 17
15
Poisson's Ratio 0.36
0.31
Shear Modulus, GPa 31
40
Shear Strength, MPa 210 to 430
260
Tensile Strength: Ultimate (UTS), MPa 350 to 760
430

Thermal Properties

Latent Heat of Fusion, J/g 140
180
Melting Completion (Liquidus), °C 780
900
Melting Onset (Solidus), °C 780
890
Specific Heat Capacity, J/kg-K 280
390
Thermal Expansion, µm/m-K 19
20

Otherwise Unclassified Properties

Density, g/cm3 10
8.0

Common Calculations

Stiffness to Weight: Axial, points 4.6
7.3
Stiffness to Weight: Bending, points 14
20
Strength to Weight: Axial, points 9.5 to 21
15
Strength to Weight: Bending, points 11 to 18
16
Thermal Shock Resistance, points 16 to 34
14

Alloy Composition


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Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0
0.3 to 1.0
Cadmium (Cd), % 0 to 0.050
0 to 0.010
Copper (Cu), % 26.6 to 29
59 to 63
Iron (Fe), % 0 to 0.050
0
Lead (Pb), % 0 to 0.030
0 to 0.090
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0
0.3 to 1.0
Silver (Ag), % 71 to 73
0
Tin (Sn), % 0
0.050 to 0.2
Zinc (Zn), % 0 to 0.060
34.2 to 40.4
Residuals, % 0 to 0.21
0 to 0.5