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CR021A Copper vs. C86700 Bronze

Both CR021A copper and C86700 bronze are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 58% of their average alloy composition in common.

For each property being compared, the top bar is CR021A copper and the bottom bar is C86700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
110
Elongation at Break, % 15
17
Poisson's Ratio 0.34
0.31
Shear Modulus, GPa 43
41
Tensile Strength: Ultimate (UTS), MPa 230
630
Tensile Strength: Yield (Proof), MPa 140
250

Thermal Properties

Latent Heat of Fusion, J/g 210
180
Maximum Temperature: Mechanical, °C 200
130
Melting Completion (Liquidus), °C 1090
880
Melting Onset (Solidus), °C 1040
860
Specific Heat Capacity, J/kg-K 390
400
Thermal Conductivity, W/m-K 380
89
Thermal Expansion, µm/m-K 17
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 98
17
Electrical Conductivity: Equal Weight (Specific), % IACS 99
19

Otherwise Unclassified Properties

Base Metal Price, % relative 31
23
Density, g/cm3 9.0
7.9
Embodied Carbon, kg CO2/kg material 2.6
2.9
Embodied Energy, MJ/kg 41
49
Embodied Water, L/kg 320
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
86
Resilience: Unit (Modulus of Resilience), kJ/m3 83
290
Stiffness to Weight: Axial, points 7.2
7.5
Stiffness to Weight: Bending, points 18
20
Strength to Weight: Axial, points 7.1
22
Strength to Weight: Bending, points 9.3
21
Thermal Diffusivity, mm2/s 110
28
Thermal Shock Resistance, points 8.1
21

Alloy Composition

Aluminum (Al), % 0
1.0 to 3.0
Bismuth (Bi), % 0 to 0.00050
0
Copper (Cu), % 99.95 to 99.998
55 to 60
Iron (Fe), % 0
1.0 to 3.0
Lead (Pb), % 0 to 0.0050
0.5 to 1.5
Manganese (Mn), % 0
1.0 to 3.5
Nickel (Ni), % 0
0 to 1.0
Phosphorus (P), % 0.0020 to 0.0070
0
Silver (Ag), % 0 to 0.015
0
Tin (Sn), % 0
0 to 1.5
Zinc (Zn), % 0
30 to 38
Residuals, % 0
0 to 1.0