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C18100 Copper vs. S20431 Stainless Steel

C18100 copper belongs to the copper alloys classification, while S20431 stainless steel belongs to the iron alloys. There are 30 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 C18100 copper and the bottom bar is S20431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Elongation at Break, % 8.3
46
Poisson's Ratio 0.34
0.28
Rockwell B Hardness 80
86
Shear Modulus, GPa 47
76
Shear Strength, MPa 300
500
Tensile Strength: Ultimate (UTS), MPa 510
710
Tensile Strength: Yield (Proof), MPa 460
350

Thermal Properties

Latent Heat of Fusion, J/g 210
280
Maximum Temperature: Mechanical, °C 200
890
Melting Completion (Liquidus), °C 1080
1400
Melting Onset (Solidus), °C 1020
1360
Specific Heat Capacity, J/kg-K 390
480
Thermal Conductivity, W/m-K 320
15
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 80
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 81
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 31
12
Density, g/cm3 8.9
7.7
Embodied Carbon, kg CO2/kg material 2.7
2.5
Embodied Energy, MJ/kg 43
36
Embodied Water, L/kg 310
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 40
270
Resilience: Unit (Modulus of Resilience), kJ/m3 900
310
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 16
25
Strength to Weight: Bending, points 16
23
Thermal Diffusivity, mm2/s 94
4.0
Thermal Shock Resistance, points 18
15

Alloy Composition

Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0.4 to 1.2
17 to 18
Copper (Cu), % 98.7 to 99.49
1.5 to 3.5
Iron (Fe), % 0
66.1 to 74.4
Magnesium (Mg), % 0.030 to 0.060
0
Manganese (Mn), % 0
5.0 to 7.0
Nickel (Ni), % 0
2.0 to 4.0
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zirconium (Zr), % 0.080 to 0.2
0
Residuals, % 0 to 0.5
0