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C72700 Copper-nickel vs. S21904 Stainless Steel

C72700 copper-nickel belongs to the copper alloys classification, while S21904 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is C72700 copper-nickel and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Elongation at Break, % 4.0 to 36
17 to 51
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 44
78
Shear Strength, MPa 310 to 620
510 to 620
Tensile Strength: Ultimate (UTS), MPa 460 to 1070
700 to 1000
Tensile Strength: Yield (Proof), MPa 580 to 1060
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 210
290
Maximum Temperature: Mechanical, °C 200
980
Melting Completion (Liquidus), °C 1100
1400
Melting Onset (Solidus), °C 930
1350
Specific Heat Capacity, J/kg-K 380
480
Thermal Conductivity, W/m-K 54
14
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 11
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 36
15
Density, g/cm3 8.8
7.7
Embodied Carbon, kg CO2/kg material 4.0
3.0
Embodied Energy, MJ/kg 62
43
Embodied Water, L/kg 350
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 380
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 1420 to 4770
380 to 2070
Stiffness to Weight: Axial, points 7.4
14
Stiffness to Weight: Bending, points 19
25
Strength to Weight: Axial, points 14 to 34
25 to 36
Strength to Weight: Bending, points 15 to 26
23 to 29
Thermal Diffusivity, mm2/s 16
3.8
Thermal Shock Resistance, points 16 to 38
15 to 21

Alloy Composition

Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Copper (Cu), % 82.1 to 86
0
Iron (Fe), % 0 to 0.5
59.5 to 67.4
Lead (Pb), % 0 to 0.020
0
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0.050 to 0.3
8.0 to 10
Nickel (Ni), % 8.5 to 9.5
5.5 to 7.5
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0
0 to 0.045
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