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CR012A Copper vs. CR008A Copper

Both CR012A copper and CR008A copper are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is CR012A copper and the bottom bar is CR008A copper.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 33
31
Density, g/cm3 9.0
9.0
Embodied Carbon, kg CO2/kg material 2.7
2.6
Embodied Energy, MJ/kg 42
41
Embodied Water, L/kg 360
320

Common Calculations

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

Alloy Composition

Bismuth (Bi), % 0 to 0.00050
0 to 0.00050
Copper (Cu), % 99.85 to 99.94
99.95 to 100
Lead (Pb), % 0
0 to 0.0050
Oxygen (O), % 0 to 0.040
0
Silver (Ag), % 0.060 to 0.080
0 to 0.015