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C72500 Copper-nickel vs. S31727 Stainless Steel

C72500 copper-nickel belongs to the copper alloys classification, while S31727 stainless steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is C72500 copper-nickel and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Poisson's Ratio 0.34
0.28
Rockwell B Hardness 75 to 100
83
Shear Modulus, GPa 45
78
Tensile Strength: Ultimate (UTS), MPa 420 to 780
630

Thermal Properties

Latent Heat of Fusion, J/g 210
290
Maximum Temperature: Mechanical, °C 210
1010
Melting Completion (Liquidus), °C 1130
1440
Melting Onset (Solidus), °C 1060
1390
Specific Heat Capacity, J/kg-K 390
470
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 35
24
Density, g/cm3 8.9
8.0
Embodied Carbon, kg CO2/kg material 3.6
4.7
Embodied Energy, MJ/kg 55
64
Embodied Water, L/kg 320
180

Common Calculations

Stiffness to Weight: Axial, points 7.6
14
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 13 to 24
22
Strength to Weight: Bending, points 14 to 21
20
Thermal Shock Resistance, points 14 to 27
14

Alloy Composition

Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17.5 to 19
Copper (Cu), % 85.2 to 89.7
2.8 to 4.0
Iron (Fe), % 0 to 0.6
53.7 to 61.3
Lead (Pb), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.2
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 8.5 to 10.5
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 1.8 to 2.8
0
Zinc (Zn), % 0 to 0.5
0
Residuals, % 0 to 0.2
0