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S31727 Stainless Steel vs. C18700 Copper

S31727 stainless steel belongs to the iron alloys classification, while C18700 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 S31727 stainless steel and the bottom bar is C18700 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Elongation at Break, % 40
9.0 to 9.6
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 78
43
Shear Strength, MPa 430
170 to 190
Tensile Strength: Ultimate (UTS), MPa 630
290 to 330
Tensile Strength: Yield (Proof), MPa 270
230 to 250

Thermal Properties

Latent Heat of Fusion, J/g 290
210
Maximum Temperature: Mechanical, °C 1010
200
Melting Completion (Liquidus), °C 1440
1080
Melting Onset (Solidus), °C 1390
950
Specific Heat Capacity, J/kg-K 470
380
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 24
30
Density, g/cm3 8.0
9.0
Embodied Carbon, kg CO2/kg material 4.7
2.6
Embodied Energy, MJ/kg 64
41
Embodied Water, L/kg 180
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
24 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 190
240 to 280
Stiffness to Weight: Axial, points 14
7.1
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 22
9.0 to 10
Strength to Weight: Bending, points 20
11 to 12
Thermal Shock Resistance, points 14
10 to 12

Alloy Composition

Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17.5 to 19
0
Copper (Cu), % 2.8 to 4.0
98 to 99.2
Iron (Fe), % 53.7 to 61.3
0
Lead (Pb), % 0
0.8 to 1.5
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 3.8 to 4.5
0
Nickel (Ni), % 14.5 to 16.5
0
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.5