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S21800 Stainless Steel vs. C71520 Copper-nickel

S21800 stainless steel belongs to the iron alloys classification, while C71520 copper-nickel belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is C71520 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
140
Elongation at Break, % 40
10 to 45
Poisson's Ratio 0.28
0.33
Rockwell B Hardness 88
35 to 86
Shear Modulus, GPa 75
51
Shear Strength, MPa 510
250 to 340
Tensile Strength: Ultimate (UTS), MPa 740
370 to 570
Tensile Strength: Yield (Proof), MPa 390
140 to 430

Thermal Properties

Latent Heat of Fusion, J/g 340
230
Maximum Temperature: Mechanical, °C 900
260
Melting Completion (Liquidus), °C 1360
1170
Melting Onset (Solidus), °C 1310
1120
Specific Heat Capacity, J/kg-K 500
400
Thermal Expansion, µm/m-K 16
15

Otherwise Unclassified Properties

Base Metal Price, % relative 15
40
Density, g/cm3 7.5
8.9
Embodied Carbon, kg CO2/kg material 3.1
5.0
Embodied Energy, MJ/kg 45
73
Embodied Water, L/kg 150
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
54 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 390
67 to 680
Stiffness to Weight: Axial, points 14
8.6
Stiffness to Weight: Bending, points 26
19
Strength to Weight: Axial, points 27
12 to 18
Strength to Weight: Bending, points 24
13 to 17
Thermal Shock Resistance, points 17
12 to 19

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.050
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
65 to 71.6
Iron (Fe), % 59.1 to 65.4
0.4 to 1.0
Lead (Pb), % 0
0 to 0.020
Manganese (Mn), % 7.0 to 9.0
0 to 1.0
Nickel (Ni), % 8.0 to 9.0
28 to 33
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.2
Silicon (Si), % 3.5 to 4.5
0
Sulfur (S), % 0 to 0.030
0 to 0.020
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.5