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C72700 Copper-nickel vs. S21800 Stainless Steel

C72700 copper-nickel belongs to the copper alloys classification, while S21800 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 S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
190
Elongation at Break, % 4.0 to 36
40
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 44
75
Shear Strength, MPa 310 to 620
510
Tensile Strength: Ultimate (UTS), MPa 460 to 1070
740
Tensile Strength: Yield (Proof), MPa 580 to 1060
390

Thermal Properties

Latent Heat of Fusion, J/g 210
340
Maximum Temperature: Mechanical, °C 200
900
Melting Completion (Liquidus), °C 1100
1360
Melting Onset (Solidus), °C 930
1310
Specific Heat Capacity, J/kg-K 380
500
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 36
15
Density, g/cm3 8.8
7.5
Embodied Carbon, kg CO2/kg material 4.0
3.1
Embodied Energy, MJ/kg 62
45
Embodied Water, L/kg 350
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 380
250
Resilience: Unit (Modulus of Resilience), kJ/m3 1420 to 4770
390
Stiffness to Weight: Axial, points 7.4
14
Stiffness to Weight: Bending, points 19
26
Strength to Weight: Axial, points 14 to 34
27
Strength to Weight: Bending, points 15 to 26
24
Thermal Shock Resistance, points 16 to 38
17

Alloy Composition

Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 82.1 to 86
0
Iron (Fe), % 0 to 0.5
59.1 to 65.4
Lead (Pb), % 0 to 0.020
0
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0.050 to 0.3
7.0 to 9.0
Nickel (Ni), % 8.5 to 9.5
8.0 to 9.0
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0
3.5 to 4.5
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