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S21900 Stainless Steel vs. C55280 Copper

S21900 stainless steel belongs to the iron alloys classification, while C55280 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 C55280 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
180

Thermal Properties

Latent Heat of Fusion, J/g 290
190
Maximum Temperature: Mechanical, °C 980
200
Melting Completion (Liquidus), °C 1400
790
Melting Onset (Solidus), °C 1350
640
Specific Heat Capacity, J/kg-K 480
410
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Density, g/cm3 7.7
8.5
Embodied Carbon, kg CO2/kg material 3.0
4.2
Embodied Energy, MJ/kg 43
67

Common Calculations

Stiffness to Weight: Axial, points 14
6.9
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 26
5.9
Strength to Weight: Bending, points 23
8.3
Thermal Shock Resistance, points 15
7.4

Alloy Composition

Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
90.5 to 91.4
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
6.8 to 7.2
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
1.8 to 2.2
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.15