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CR012A Copper vs. C95700 Bronze

Both CR012A copper and C95700 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 75% of their average alloy composition in common.

For each property being compared, the top bar is CR012A copper and the bottom bar is C95700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
130
Elongation at Break, % 15
23
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 43
47
Tensile Strength: Ultimate (UTS), MPa 220
680
Tensile Strength: Yield (Proof), MPa 130
310

Thermal Properties

Latent Heat of Fusion, J/g 210
230
Maximum Temperature: Mechanical, °C 200
220
Melting Completion (Liquidus), °C 1090
990
Melting Onset (Solidus), °C 1040
950
Specific Heat Capacity, J/kg-K 390
440
Thermal Conductivity, W/m-K 390
12
Thermal Expansion, µm/m-K 17
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 100
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 100
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 33
26
Density, g/cm3 9.0
8.2
Embodied Carbon, kg CO2/kg material 2.7
3.3
Embodied Energy, MJ/kg 42
54
Embodied Water, L/kg 360
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29
130
Resilience: Unit (Modulus of Resilience), kJ/m3 76
390
Stiffness to Weight: Axial, points 7.2
8.5
Stiffness to Weight: Bending, points 18
20
Strength to Weight: Axial, points 6.8
23
Strength to Weight: Bending, points 9.0
21
Thermal Diffusivity, mm2/s 110
3.3
Thermal Shock Resistance, points 7.8
21

Alloy Composition


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Aluminum (Al), % 0
7.0 to 8.5
Bismuth (Bi), % 0 to 0.00050
0
Copper (Cu), % 99.85 to 99.94
71 to 78.5
Iron (Fe), % 0
2.0 to 4.0
Lead (Pb), % 0
0 to 0.030
Manganese (Mn), % 0
11 to 14
Nickel (Ni), % 0
1.5 to 3.0
Oxygen (O), % 0 to 0.040
0
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 0.060 to 0.080
0
Residuals, % 0
0 to 0.5