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CR012A Copper vs. C68700 Brass

Both CR012A copper and C68700 brass are copper alloys. They have 78% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is CR012A copper and the bottom bar is C68700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
110
Poisson's Ratio 0.34
0.32
Shear Modulus, GPa 43
41
Tensile Strength: Ultimate (UTS), MPa 220
390
Tensile Strength: Yield (Proof), MPa 130
140

Thermal Properties

Latent Heat of Fusion, J/g 210
190
Maximum Temperature: Mechanical, °C 200
160
Melting Completion (Liquidus), °C 1090
970
Melting Onset (Solidus), °C 1040
930
Specific Heat Capacity, J/kg-K 390
400
Thermal Conductivity, W/m-K 390
100
Thermal Expansion, µm/m-K 17
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 100
23
Electrical Conductivity: Equal Weight (Specific), % IACS 100
25

Otherwise Unclassified Properties

Base Metal Price, % relative 33
26
Density, g/cm3 9.0
8.3
Embodied Carbon, kg CO2/kg material 2.7
2.8
Embodied Energy, MJ/kg 42
46
Embodied Water, L/kg 360
340

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 76
90
Stiffness to Weight: Axial, points 7.2
7.3
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 6.8
13
Strength to Weight: Bending, points 9.0
14
Thermal Diffusivity, mm2/s 110
30
Thermal Shock Resistance, points 7.8
13

Alloy Composition


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Aluminum (Al), % 0
1.8 to 2.5
Arsenic (As), % 0
0.020 to 0.1
Bismuth (Bi), % 0 to 0.00050
0
Copper (Cu), % 99.85 to 99.94
76 to 79
Iron (Fe), % 0
0 to 0.060
Lead (Pb), % 0
0 to 0.070
Oxygen (O), % 0 to 0.040
0
Silver (Ag), % 0.060 to 0.080
0
Zinc (Zn), % 0
17.8 to 22.2
Residuals, % 0
0 to 0.5