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C71000 Copper-nickel vs. S32950 Stainless Steel

C71000 copper-nickel belongs to the copper alloys classification, while S32950 stainless steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is C71000 copper-nickel and the bottom bar is S32950 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 130
200
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 49
80
Tensile Strength: Ultimate (UTS), MPa 320 to 560
780

Thermal Properties

Latent Heat of Fusion, J/g 230
300
Maximum Temperature: Mechanical, °C 240
1100
Melting Completion (Liquidus), °C 1200
1430
Melting Onset (Solidus), °C 1150
1390
Specific Heat Capacity, J/kg-K 400
480
Thermal Conductivity, W/m-K 43
16
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.5
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 6.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 37
17
Density, g/cm3 8.9
7.7
Embodied Carbon, kg CO2/kg material 4.3
3.4
Embodied Energy, MJ/kg 63
47
Embodied Water, L/kg 290
180

Common Calculations

Stiffness to Weight: Axial, points 8.2
15
Stiffness to Weight: Bending, points 19
25
Strength to Weight: Axial, points 10 to 18
28
Strength to Weight: Bending, points 12 to 17
24
Thermal Diffusivity, mm2/s 12
4.3
Thermal Shock Resistance, points 12 to 20
21

Alloy Composition

Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
26 to 29
Copper (Cu), % 73.5 to 80.5
0
Iron (Fe), % 0.5 to 1.0
60.3 to 69.4
Lead (Pb), % 0 to 0.050
0
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
1.0 to 2.5
Nickel (Ni), % 19 to 23
3.5 to 5.2
Nitrogen (N), % 0
0.15 to 0.35
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0 to 0.6
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0 to 0.5
0