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S21800 Stainless Steel vs. C18900 Copper

S21800 stainless steel belongs to the iron alloys classification, while C18900 copper belongs to the copper alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is C18900 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
120
Elongation at Break, % 40
14 to 48
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 75
43
Shear Strength, MPa 510
190 to 300
Tensile Strength: Ultimate (UTS), MPa 740
260 to 500
Tensile Strength: Yield (Proof), MPa 390
67 to 390

Thermal Properties

Latent Heat of Fusion, J/g 340
210
Maximum Temperature: Mechanical, °C 900
200
Melting Completion (Liquidus), °C 1360
1080
Melting Onset (Solidus), °C 1310
1020
Specific Heat Capacity, J/kg-K 500
390
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 15
31
Density, g/cm3 7.5
8.9
Embodied Carbon, kg CO2/kg material 3.1
2.7
Embodied Energy, MJ/kg 45
42
Embodied Water, L/kg 150
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
65 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 390
20 to 660
Stiffness to Weight: Axial, points 14
7.2
Stiffness to Weight: Bending, points 26
18
Strength to Weight: Axial, points 27
8.2 to 16
Strength to Weight: Bending, points 24
10 to 16
Thermal Shock Resistance, points 17
9.3 to 18

Alloy Composition

Aluminum (Al), % 0
0 to 0.010
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
97.7 to 99.15
Iron (Fe), % 59.1 to 65.4
0
Lead (Pb), % 0
0 to 0.020
Manganese (Mn), % 7.0 to 9.0
0.1 to 0.3
Nickel (Ni), % 8.0 to 9.0
0
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.050
Silicon (Si), % 3.5 to 4.5
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0.6 to 0.9
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.5