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C81400 Copper vs. S31266 Stainless Steel

C81400 copper belongs to the copper alloys classification, while S31266 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is C81400 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, % 11
40
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 41
81
Tensile Strength: Ultimate (UTS), MPa 370
860
Tensile Strength: Yield (Proof), MPa 250
470

Thermal Properties

Latent Heat of Fusion, J/g 210
310
Maximum Temperature: Mechanical, °C 200
1100
Melting Completion (Liquidus), °C 1090
1470
Melting Onset (Solidus), °C 1070
1420
Specific Heat Capacity, J/kg-K 390
460
Thermal Conductivity, W/m-K 260
12
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 60
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 61
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 33
37
Density, g/cm3 8.9
8.2
Embodied Carbon, kg CO2/kg material 2.8
6.5
Embodied Energy, MJ/kg 45
89
Embodied Water, L/kg 310
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
290
Resilience: Unit (Modulus of Resilience), kJ/m3 260
540
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 18
24
Strength to Weight: Axial, points 11
29
Strength to Weight: Bending, points 13
24
Thermal Diffusivity, mm2/s 75
3.1
Thermal Shock Resistance, points 13
18

Alloy Composition

Beryllium (Be), % 0.020 to 0.1
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0.6 to 1.0
23 to 25
Copper (Cu), % 98.4 to 99.38
1.0 to 2.5
Iron (Fe), % 0
34.1 to 46
Manganese (Mn), % 0
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
0 to 0.035
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5
Residuals, % 0 to 0.5
0