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CR018A Copper vs. CR025A Copper

Both CR018A copper and CR025A 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 CR018A copper and the bottom bar is CR025A 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
230
Tensile Strength: Yield (Proof), MPa 130
140

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
370
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 100
99
Electrical Conductivity: Equal Weight (Specific), % IACS 100
99

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
31
Resilience: Unit (Modulus of Resilience), kJ/m3 76
83
Stiffness to Weight: Axial, points 7.2
7.2
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 6.8
7.1
Strength to Weight: Bending, points 9.0
9.3
Thermal Diffusivity, mm2/s 110
110
Thermal Shock Resistance, points 7.8
8.1

Alloy Composition

Bismuth (Bi), % 0 to 0.00050
0 to 0.00050
Copper (Cu), % 99.914 to 99.94
99.9 to 99.96
Lead (Pb), % 0
0 to 0.0050
Phosphorus (P), % 0
0.040 to 0.060
Silver (Ag), % 0.060 to 0.080
0 to 0.015