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C18900 Copper vs. S31266 Stainless Steel

C18900 copper belongs to the copper alloys classification, while S31266 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is C18900 copper and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
210
Elongation at Break, % 14 to 48
40
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 43
81
Shear Strength, MPa 190 to 300
590
Tensile Strength: Ultimate (UTS), MPa 260 to 500
860
Tensile Strength: Yield (Proof), MPa 67 to 390
470

Thermal Properties

Latent Heat of Fusion, J/g 210
310
Maximum Temperature: Mechanical, °C 200
1100
Melting Completion (Liquidus), °C 1080
1470
Melting Onset (Solidus), °C 1020
1420
Specific Heat Capacity, J/kg-K 390
460
Thermal Conductivity, W/m-K 130
12
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 30
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 31
37
Density, g/cm3 8.9
8.2
Embodied Carbon, kg CO2/kg material 2.7
6.5
Embodied Energy, MJ/kg 42
89
Embodied Water, L/kg 310
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65 to 95
290
Resilience: Unit (Modulus of Resilience), kJ/m3 20 to 660
540
Stiffness to Weight: Axial, points 7.2
14
Stiffness to Weight: Bending, points 18
24
Strength to Weight: Axial, points 8.2 to 16
29
Strength to Weight: Bending, points 10 to 16
24
Thermal Diffusivity, mm2/s 38
3.1
Thermal Shock Resistance, points 9.3 to 18
18

Alloy Composition

Aluminum (Al), % 0 to 0.010
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
23 to 25
Copper (Cu), % 97.7 to 99.15
1.0 to 2.5
Iron (Fe), % 0
34.1 to 46
Lead (Pb), % 0 to 0.020
0
Manganese (Mn), % 0.1 to 0.3
2.0 to 4.0
Molybdenum (Mo), % 0
5.2 to 6.2
Nickel (Ni), % 0
21 to 24
Nitrogen (N), % 0
0.35 to 0.6
Phosphorus (P), % 0 to 0.050
0 to 0.035
Silicon (Si), % 0.15 to 0.4
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 0.6 to 0.9
0
Tungsten (W), % 0
1.5 to 2.5
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.5
0