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ASTM B780 Alloy vs. C63200 Bronze

ASTM B780 alloy belongs to the otherwise unclassified metals classification, while C63200 bronze 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 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 B780 alloy and the bottom bar is C63200 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
120
Elongation at Break, % 1.1 to 9.1
17 to 18
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 30
44
Shear Strength, MPa 200 to 340
390 to 440
Tensile Strength: Ultimate (UTS), MPa 330 to 590
640 to 710

Thermal Properties

Latent Heat of Fusion, J/g 140
230
Specific Heat Capacity, J/kg-K 270
440
Thermal Expansion, µm/m-K 18
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 70 to 76
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 62 to 68
7.6

Otherwise Unclassified Properties

Density, g/cm3 10
8.3

Common Calculations

Stiffness to Weight: Axial, points 4.5
7.9
Stiffness to Weight: Bending, points 14
20
Strength to Weight: Axial, points 9.1 to 16
21 to 24
Strength to Weight: Bending, points 11 to 15
20 to 21
Thermal Shock Resistance, points 16 to 29
22 to 24

Alloy Composition

Aluminum (Al), % 0
8.7 to 9.5
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 23.5 to 25.7
78.8 to 82.6
Iron (Fe), % 0 to 0.050
3.5 to 4.3
Lead (Pb), % 0 to 0.030
0 to 0.020
Manganese (Mn), % 0
1.2 to 2.0
Nickel (Ni), % 0.35 to 0.65
4.0 to 4.8
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 74 to 76
0
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0
0 to 0.5