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C72700 Copper-nickel vs. S31727 Stainless Steel

C72700 copper-nickel belongs to the copper alloys classification, while S31727 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is C72700 copper-nickel and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Elongation at Break, % 4.0 to 36
40
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 44
78
Shear Strength, MPa 310 to 620
430
Tensile Strength: Ultimate (UTS), MPa 460 to 1070
630
Tensile Strength: Yield (Proof), MPa 580 to 1060
270

Thermal Properties

Latent Heat of Fusion, J/g 210
290
Maximum Temperature: Mechanical, °C 200
1010
Melting Completion (Liquidus), °C 1100
1440
Melting Onset (Solidus), °C 930
1390
Specific Heat Capacity, J/kg-K 380
470
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 36
24
Density, g/cm3 8.8
8.0
Embodied Carbon, kg CO2/kg material 4.0
4.7
Embodied Energy, MJ/kg 62
64
Embodied Water, L/kg 350
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 380
200
Resilience: Unit (Modulus of Resilience), kJ/m3 1420 to 4770
190
Stiffness to Weight: Axial, points 7.4
14
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 14 to 34
22
Strength to Weight: Bending, points 15 to 26
20
Thermal Shock Resistance, points 16 to 38
14

Alloy Composition

Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17.5 to 19
Copper (Cu), % 82.1 to 86
2.8 to 4.0
Iron (Fe), % 0 to 0.5
53.7 to 61.3
Lead (Pb), % 0 to 0.020
0
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0.050 to 0.3
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 8.5 to 9.5
14.5 to 16.5
Niobium (Nb), % 0 to 0.1
0
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), % 5.5 to 6.5
0
Zinc (Zn), % 0 to 0.5
0
Residuals, % 0 to 0.3
0