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CR024A Copper vs. C87700 Bronze

Both CR024A copper and C87700 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 89% of their average alloy composition in common.

For each property being compared, the top bar is CR024A copper and the bottom bar is C87700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
110
Elongation at Break, % 15
3.6
Poisson's Ratio 0.34
0.33
Shear Modulus, GPa 43
42
Tensile Strength: Ultimate (UTS), MPa 230
300
Tensile Strength: Yield (Proof), MPa 140
120

Thermal Properties

Latent Heat of Fusion, J/g 210
250
Maximum Temperature: Mechanical, °C 200
180
Melting Completion (Liquidus), °C 1090
980
Melting Onset (Solidus), °C 1040
900
Specific Heat Capacity, J/kg-K 390
400
Thermal Conductivity, W/m-K 370
120
Thermal Expansion, µm/m-K 17
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 100
45
Electrical Conductivity: Equal Weight (Specific), % IACS 100
48

Otherwise Unclassified Properties

Base Metal Price, % relative 31
29
Density, g/cm3 9.0
8.5
Embodied Carbon, kg CO2/kg material 2.6
2.7
Embodied Energy, MJ/kg 41
45
Embodied Water, L/kg 320
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
8.6
Resilience: Unit (Modulus of Resilience), kJ/m3 83
64
Stiffness to Weight: Axial, points 7.2
7.4
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 7.1
9.8
Strength to Weight: Bending, points 9.3
12
Thermal Diffusivity, mm2/s 110
34
Thermal Shock Resistance, points 8.1
11

Alloy Composition

Antimony (Sb), % 0
0 to 0.1
Copper (Cu), % 99.9 to 99.985
87.5 to 90.5
Iron (Fe), % 0
0 to 0.5
Lead (Pb), % 0
0 to 0.090
Manganese (Mn), % 0
0 to 0.8
Nickel (Ni), % 0
0 to 0.25
Phosphorus (P), % 0.015 to 0.040
0 to 0.15
Silicon (Si), % 0
2.5 to 3.5
Silver (Ag), % 0 to 0.015
0
Tin (Sn), % 0
0 to 2.0
Zinc (Zn), % 0
7.0 to 9.0
Residuals, % 0
0 to 0.8