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C94400 Bronze vs. ASTM B780 Alloy

C94400 bronze 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 C94400 bronze and the bottom bar is ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
83
Elongation at Break, % 18
1.1 to 9.1
Poisson's Ratio 0.35
0.36
Shear Modulus, GPa 37
30
Tensile Strength: Ultimate (UTS), MPa 220
330 to 590

Thermal Properties

Latent Heat of Fusion, J/g 180
140
Specific Heat Capacity, J/kg-K 350
270
Thermal Expansion, µm/m-K 19
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
70 to 76
Electrical Conductivity: Equal Weight (Specific), % IACS 9.9
62 to 68

Otherwise Unclassified Properties

Density, g/cm3 9.1
10

Common Calculations

Stiffness to Weight: Axial, points 6.1
4.5
Stiffness to Weight: Bending, points 17
14
Strength to Weight: Axial, points 6.8
9.1 to 16
Strength to Weight: Bending, points 9.0
11 to 15
Thermal Shock Resistance, points 8.3
16 to 29

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0 to 0.8
0
Cadmium (Cd), % 0
0 to 0.050
Copper (Cu), % 76.1 to 84
23.5 to 25.7
Iron (Fe), % 0 to 0.15
0 to 0.050
Lead (Pb), % 9.0 to 12
0 to 0.030
Nickel (Ni), % 0 to 1.0
0.35 to 0.65
Phosphorus (P), % 0 to 0.050
0
Silicon (Si), % 0 to 0.0050
0
Silver (Ag), % 0
74 to 76
Sulfur (S), % 0 to 0.080
0
Tin (Sn), % 7.0 to 9.0
0
Zinc (Zn), % 0 to 0.8
0 to 0.060