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CR020A Copper vs. C77400 Nickel Silver

Both CR020A copper and C77400 nickel silver are copper alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 45% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is CR020A copper and the bottom bar is C77400 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
110
Elongation at Break, % 15
25
Poisson's Ratio 0.34
0.3
Shear Modulus, GPa 43
42
Tensile Strength: Ultimate (UTS), MPa 220
570
Tensile Strength: Yield (Proof), MPa 130
250

Thermal Properties

Latent Heat of Fusion, J/g 210
170
Maximum Temperature: Mechanical, °C 200
130
Melting Completion (Liquidus), °C 1090
810
Melting Onset (Solidus), °C 1040
770
Specific Heat Capacity, J/kg-K 390
390
Thermal Expansion, µm/m-K 17
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 100
27
Electrical Conductivity: Equal Weight (Specific), % IACS 100
31

Otherwise Unclassified Properties

Base Metal Price, % relative 31
25
Density, g/cm3 9.0
7.9
Embodied Carbon, kg CO2/kg material 2.6
3.5
Embodied Energy, MJ/kg 41
57
Embodied Water, L/kg 320
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29
120
Resilience: Unit (Modulus of Resilience), kJ/m3 76
290
Stiffness to Weight: Axial, points 7.2
7.7
Stiffness to Weight: Bending, points 18
20
Strength to Weight: Axial, points 6.8
20
Strength to Weight: Bending, points 9.0
19
Thermal Shock Resistance, points 7.8
18

Alloy Composition


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Bismuth (Bi), % 0 to 0.00050
0
Copper (Cu), % 99.95 to 99.999
43 to 47
Lead (Pb), % 0 to 0.0050
0 to 0.2
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0.0010 to 0.0060
0
Silver (Ag), % 0 to 0.015
0
Zinc (Zn), % 0
41.3 to 48
Residuals, % 0
0 to 0.5