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C71520 Copper-nickel vs. S21904 Stainless Steel

C71520 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 (5, in this case) are not shown.

For each property being compared, the top bar is C71520 copper-nickel and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
200
Elongation at Break, % 10 to 45
17 to 51
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 51
78
Shear Strength, MPa 250 to 340
510 to 620
Tensile Strength: Ultimate (UTS), MPa 370 to 570
700 to 1000
Tensile Strength: Yield (Proof), MPa 140 to 430
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 230
290
Maximum Temperature: Mechanical, °C 260
980
Melting Completion (Liquidus), °C 1170
1400
Melting Onset (Solidus), °C 1120
1350
Specific Heat Capacity, J/kg-K 400
480
Thermal Conductivity, W/m-K 32
14
Thermal Expansion, µm/m-K 15
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 5.7
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 5.8
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 40
15
Density, g/cm3 8.9
7.7
Embodied Carbon, kg CO2/kg material 5.0
3.0
Embodied Energy, MJ/kg 73
43
Embodied Water, L/kg 280
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 54 to 130
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 67 to 680
380 to 2070
Stiffness to Weight: Axial, points 8.6
14
Stiffness to Weight: Bending, points 19
25
Strength to Weight: Axial, points 12 to 18
25 to 36
Strength to Weight: Bending, points 13 to 17
23 to 29
Thermal Diffusivity, mm2/s 8.9
3.8
Thermal Shock Resistance, points 12 to 19
15 to 21

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.040
Chromium (Cr), % 0
19 to 21.5
Copper (Cu), % 65 to 71.6
0
Iron (Fe), % 0.4 to 1.0
59.5 to 67.4
Lead (Pb), % 0 to 0.020
0
Manganese (Mn), % 0 to 1.0
8.0 to 10
Nickel (Ni), % 28 to 33
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.2
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Zinc (Zn), % 0 to 0.5
0
Residuals, % 0 to 0.5
0