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C81500 Copper vs. ASTM B780 Alloy

C81500 copper belongs to the copper alloys classification, while ASTM B780 alloy belongs to the otherwise unclassified metals. 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 (14, in this case) are not shown.

For each property being compared, the top bar is C81500 copper and the bottom bar is ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
83
Elongation at Break, % 17
1.1 to 9.1
Poisson's Ratio 0.34
0.36
Shear Modulus, GPa 44
30
Tensile Strength: Ultimate (UTS), MPa 350
330 to 590

Thermal Properties

Latent Heat of Fusion, J/g 210
140
Specific Heat Capacity, J/kg-K 390
270
Thermal Expansion, µm/m-K 17
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 82
70 to 76
Electrical Conductivity: Equal Weight (Specific), % IACS 83
62 to 68

Otherwise Unclassified Properties

Density, g/cm3 8.9
10

Common Calculations

Stiffness to Weight: Axial, points 7.3
4.5
Stiffness to Weight: Bending, points 18
14
Strength to Weight: Axial, points 11
9.1 to 16
Strength to Weight: Bending, points 12
11 to 15
Thermal Shock Resistance, points 12
16 to 29

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Cadmium (Cd), % 0
0 to 0.050
Chromium (Cr), % 0.4 to 1.5
0
Copper (Cu), % 97.4 to 99.6
23.5 to 25.7
Iron (Fe), % 0 to 0.1
0 to 0.050
Lead (Pb), % 0 to 0.020
0 to 0.030
Nickel (Ni), % 0
0.35 to 0.65
Silicon (Si), % 0 to 0.15
0
Silver (Ag), % 0
74 to 76
Tin (Sn), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.1
0 to 0.060
Residuals, % 0 to 0.5
0