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C71520 Copper-nickel vs. S31730 Stainless Steel

C71520 copper-nickel belongs to the copper alloys classification, while S31730 stainless steel belongs to the iron alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is C71520 copper-nickel and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
200
Elongation at Break, % 10 to 45
40
Poisson's Ratio 0.33
0.28
Rockwell B Hardness 35 to 86
78
Shear Modulus, GPa 51
77
Shear Strength, MPa 250 to 340
370
Tensile Strength: Ultimate (UTS), MPa 370 to 570
540
Tensile Strength: Yield (Proof), MPa 140 to 430
200

Thermal Properties

Latent Heat of Fusion, J/g 230
290
Maximum Temperature: Mechanical, °C 260
990
Melting Completion (Liquidus), °C 1170
1430
Melting Onset (Solidus), °C 1120
1390
Specific Heat Capacity, J/kg-K 400
470
Thermal Expansion, µm/m-K 15
16

Otherwise Unclassified Properties

Base Metal Price, % relative 40
24
Density, g/cm3 8.9
8.0
Embodied Carbon, kg CO2/kg material 5.0
4.6
Embodied Energy, MJ/kg 73
63
Embodied Water, L/kg 280
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54 to 130
170
Resilience: Unit (Modulus of Resilience), kJ/m3 67 to 680
99
Stiffness to Weight: Axial, points 8.6
14
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 12 to 18
19
Strength to Weight: Bending, points 13 to 17
18
Thermal Shock Resistance, points 12 to 19
12

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.030
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 65 to 71.6
4.0 to 5.0
Iron (Fe), % 0.4 to 1.0
52.4 to 61
Lead (Pb), % 0 to 0.020
0
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 28 to 33
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0 to 0.2
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.010
Zinc (Zn), % 0 to 0.5
0
Residuals, % 0 to 0.5
0