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ASTM B780 Alloy vs. C83600 Ounce Metal

ASTM B780 alloy belongs to the otherwise unclassified metals classification, while C83600 ounce metal belongs to the copper alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 16 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 B780 alloy and the bottom bar is C83600 ounce metal.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
110
Elongation at Break, % 1.1 to 9.1
21
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 30
39
Tensile Strength: Ultimate (UTS), MPa 330 to 590
250

Thermal Properties

Latent Heat of Fusion, J/g 140
190
Specific Heat Capacity, J/kg-K 270
370
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 70 to 76
15
Electrical Conductivity: Equal Weight (Specific), % IACS 62 to 68
15

Otherwise Unclassified Properties

Density, g/cm3 10
8.8

Common Calculations

Stiffness to Weight: Axial, points 4.5
6.7
Stiffness to Weight: Bending, points 14
18
Strength to Weight: Axial, points 9.1 to 16
7.9
Strength to Weight: Bending, points 11 to 15
10
Thermal Shock Resistance, points 16 to 29
9.3

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.25
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 23.5 to 25.7
84 to 86
Iron (Fe), % 0 to 0.050
0 to 0.3
Lead (Pb), % 0 to 0.030
4.0 to 6.0
Nickel (Ni), % 0.35 to 0.65
0 to 1.0
Phosphorus (P), % 0
0 to 1.5
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 74 to 76
0
Sulfur (S), % 0
0 to 0.080
Tin (Sn), % 0
4.0 to 6.0
Zinc (Zn), % 0 to 0.060
4.0 to 6.0
Residuals, % 0
0 to 0.7