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C72900 Copper-nickel vs. S21900 Stainless Steel

C72900 copper-nickel belongs to the copper alloys classification, while S21900 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 C72900 copper-nickel and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Elongation at Break, % 6.0 to 20
50
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 45
78
Shear Strength, MPa 540 to 630
510
Tensile Strength: Ultimate (UTS), MPa 870 to 1080
710
Tensile Strength: Yield (Proof), MPa 700 to 920
390

Thermal Properties

Latent Heat of Fusion, J/g 210
290
Maximum Temperature: Mechanical, °C 210
980
Melting Completion (Liquidus), °C 1120
1400
Melting Onset (Solidus), °C 950
1350
Specific Heat Capacity, J/kg-K 380
480
Thermal Conductivity, W/m-K 29
14
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 39
15
Density, g/cm3 8.8
7.7
Embodied Carbon, kg CO2/kg material 4.6
3.0
Embodied Energy, MJ/kg 72
43
Embodied Water, L/kg 360
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 49 to 210
300
Resilience: Unit (Modulus of Resilience), kJ/m3 2030 to 3490
380
Stiffness to Weight: Axial, points 7.6
14
Stiffness to Weight: Bending, points 19
25
Strength to Weight: Axial, points 27 to 34
26
Strength to Weight: Bending, points 23 to 27
23
Thermal Diffusivity, mm2/s 8.6
3.8
Thermal Shock Resistance, points 31 to 38
15

Alloy Composition

Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
19 to 21.5
Copper (Cu), % 74.1 to 78
0
Iron (Fe), % 0 to 0.5
59.4 to 67.4
Lead (Pb), % 0 to 0.020
0
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.3
8.0 to 10
Nickel (Ni), % 14.5 to 15.5
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), % 7.5 to 8.5
0
Zinc (Zn), % 0 to 0.5
0
Residuals, % 0 to 0.3
0