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ASTM B780 Alloy vs. C94500 Bronze

ASTM B780 alloy belongs to the otherwise unclassified metals classification, while C94500 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 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 ASTM B780 alloy and the bottom bar is C94500 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
92
Elongation at Break, % 1.1 to 9.1
12
Poisson's Ratio 0.36
0.36
Shear Modulus, GPa 30
34
Tensile Strength: Ultimate (UTS), MPa 330 to 590
170

Thermal Properties

Latent Heat of Fusion, J/g 140
160
Specific Heat Capacity, J/kg-K 270
330
Thermal Expansion, µm/m-K 18
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 70 to 76
10
Electrical Conductivity: Equal Weight (Specific), % IACS 62 to 68
9.7

Otherwise Unclassified Properties

Density, g/cm3 10
9.3

Common Calculations

Stiffness to Weight: Axial, points 4.5
5.5
Stiffness to Weight: Bending, points 14
16
Strength to Weight: Axial, points 9.1 to 16
5.2
Strength to Weight: Bending, points 11 to 15
7.4
Thermal Shock Resistance, points 16 to 29
6.7

Alloy Composition

Aluminum (Al), % 0
0 to 0.0050
Antimony (Sb), % 0
0 to 0.8
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 23.5 to 25.7
66.7 to 78
Iron (Fe), % 0 to 0.050
0 to 0.15
Lead (Pb), % 0 to 0.030
16 to 22
Nickel (Ni), % 0.35 to 0.65
0 to 1.0
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 74 to 76
0
Sulfur (S), % 0
0 to 0.080
Tin (Sn), % 0
6.0 to 8.0
Zinc (Zn), % 0 to 0.060
0 to 1.2