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S21900 Stainless Steel vs. C55281 Copper

S21900 stainless steel belongs to the iron alloys classification, while C55281 copper belongs to the copper alloys. There are 18 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is S21900 stainless steel and the bottom bar is C55281 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 78
40
Tensile Strength: Ultimate (UTS), MPa 710
190

Thermal Properties

Latent Heat of Fusion, J/g 290
190
Maximum Temperature: Mechanical, °C 980
200
Melting Completion (Liquidus), °C 1400
810
Melting Onset (Solidus), °C 1350
640
Specific Heat Capacity, J/kg-K 480
400
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Density, g/cm3 7.7
8.7
Embodied Carbon, kg CO2/kg material 3.0
7.0
Embodied Energy, MJ/kg 43
110

Common Calculations

Stiffness to Weight: Axial, points 14
6.9
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 26
6.1
Strength to Weight: Bending, points 23
8.5
Thermal Shock Resistance, points 15
7.7

Alloy Composition

Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
88.5 to 89.4
Iron (Fe), % 59.4 to 67.4
0
Manganese (Mn), % 8.0 to 10
0
Nickel (Ni), % 5.5 to 7.5
0
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
5.8 to 6.2
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
4.8 to 5.2
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.15