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CR012A Copper vs. C85700 Brass

Both CR012A copper and C85700 brass are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 61% of their average alloy composition in common.

For each property being compared, the top bar is CR012A copper and the bottom bar is C85700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
100
Elongation at Break, % 15
17
Poisson's Ratio 0.34
0.31
Shear Modulus, GPa 43
40
Tensile Strength: Ultimate (UTS), MPa 220
310
Tensile Strength: Yield (Proof), MPa 130
110

Thermal Properties

Latent Heat of Fusion, J/g 210
170
Maximum Temperature: Mechanical, °C 200
120
Melting Completion (Liquidus), °C 1090
940
Melting Onset (Solidus), °C 1040
910
Specific Heat Capacity, J/kg-K 390
380
Thermal Conductivity, W/m-K 390
84
Thermal Expansion, µm/m-K 17
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 100
22
Electrical Conductivity: Equal Weight (Specific), % IACS 100
25

Otherwise Unclassified Properties

Base Metal Price, % relative 33
24
Density, g/cm3 9.0
8.0
Embodied Carbon, kg CO2/kg material 2.7
2.8
Embodied Energy, MJ/kg 42
47
Embodied Water, L/kg 360
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29
41
Resilience: Unit (Modulus of Resilience), kJ/m3 76
59
Stiffness to Weight: Axial, points 7.2
7.2
Stiffness to Weight: Bending, points 18
20
Strength to Weight: Axial, points 6.8
11
Strength to Weight: Bending, points 9.0
13
Thermal Diffusivity, mm2/s 110
27
Thermal Shock Resistance, points 7.8
10

Alloy Composition


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Aluminum (Al), % 0
0 to 0.8
Bismuth (Bi), % 0 to 0.00050
0
Copper (Cu), % 99.85 to 99.94
58 to 64
Iron (Fe), % 0
0 to 0.7
Lead (Pb), % 0
0.8 to 1.5
Nickel (Ni), % 0
0 to 1.0
Oxygen (O), % 0 to 0.040
0
Silicon (Si), % 0
0 to 0.050
Silver (Ag), % 0.060 to 0.080
0
Tin (Sn), % 0
0.5 to 1.5
Zinc (Zn), % 0
32 to 40
Residuals, % 0
0 to 1.3