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S21904 Stainless Steel vs. C71520 Copper-nickel

S21904 stainless steel belongs to the iron alloys classification, while C71520 copper-nickel belongs to the copper 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 S21904 stainless steel and the bottom bar is C71520 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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