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CR012A Copper vs. C87300 Bronze

Both CR012A copper and C87300 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a moderately high 95% of their average alloy composition in common.

For each property being compared, the top bar is CR012A copper and the bottom bar is C87300 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
120
Elongation at Break, % 15
22
Poisson's Ratio 0.34
0.34
Shear Modulus, GPa 43
43
Tensile Strength: Ultimate (UTS), MPa 220
350
Tensile Strength: Yield (Proof), MPa 130
140

Thermal Properties

Latent Heat of Fusion, J/g 210
280
Maximum Temperature: Mechanical, °C 200
200
Melting Completion (Liquidus), °C 1090
970
Melting Onset (Solidus), °C 1040
820
Specific Heat Capacity, J/kg-K 390
410
Thermal Conductivity, W/m-K 390
28
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 100
6.1
Electrical Conductivity: Equal Weight (Specific), % IACS 100
6.4

Otherwise Unclassified Properties

Base Metal Price, % relative 33
29
Density, g/cm3 9.0
8.6
Embodied Carbon, kg CO2/kg material 2.7
2.7
Embodied Energy, MJ/kg 42
42
Embodied Water, L/kg 360
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29
62
Resilience: Unit (Modulus of Resilience), kJ/m3 76
86
Stiffness to Weight: Axial, points 7.2
7.5
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 6.8
11
Strength to Weight: Bending, points 9.0
13
Thermal Diffusivity, mm2/s 110
8.0
Thermal Shock Resistance, points 7.8
13

Alloy Composition


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Bismuth (Bi), % 0 to 0.00050
0
Copper (Cu), % 99.85 to 99.94
94 to 95.7
Iron (Fe), % 0
0 to 0.2
Lead (Pb), % 0
0 to 0.2
Manganese (Mn), % 0
0.8 to 1.5
Oxygen (O), % 0 to 0.040
0
Silicon (Si), % 0
3.5 to 5.0
Silver (Ag), % 0.060 to 0.080
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.5