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C63800 Bronze vs. ASTM B780 Alloy

C63800 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 17 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is C63800 bronze and the bottom bar is ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
83
Elongation at Break, % 7.9 to 41
1.1 to 9.1
Poisson's Ratio 0.34
0.36
Shear Modulus, GPa 43
30
Shear Strength, MPa 320 to 500
200 to 340
Tensile Strength: Ultimate (UTS), MPa 460 to 1010
330 to 590

Thermal Properties

Latent Heat of Fusion, J/g 240
140
Specific Heat Capacity, J/kg-K 410
270
Thermal Expansion, µm/m-K 17
18

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.6
10

Common Calculations

Stiffness to Weight: Axial, points 7.4
4.5
Stiffness to Weight: Bending, points 19
14
Strength to Weight: Axial, points 15 to 33
9.1 to 16
Strength to Weight: Bending, points 15 to 26
11 to 15
Thermal Shock Resistance, points 17 to 36
16 to 29

Alloy Composition

Aluminum (Al), % 2.5 to 3.1
0
Cadmium (Cd), % 0
0 to 0.050
Cobalt (Co), % 0.25 to 0.55
0
Copper (Cu), % 92.4 to 95.8
23.5 to 25.7
Iron (Fe), % 0 to 0.2
0 to 0.050
Lead (Pb), % 0 to 0.050
0 to 0.030
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.2
0.35 to 0.65
Silicon (Si), % 1.5 to 2.1
0
Silver (Ag), % 0
74 to 76
Zinc (Zn), % 0 to 0.8
0 to 0.060
Residuals, % 0 to 0.5
0