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C18700 Copper vs. EN 1.3956 Stainless Steel

C18700 copper belongs to the copper alloys classification, while EN 1.3956 stainless steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is C18700 copper and the bottom bar is EN 1.3956 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 9.0 to 9.6
27
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 43
79
Tensile Strength: Ultimate (UTS), MPa 290 to 330
650
Tensile Strength: Yield (Proof), MPa 230 to 250
330

Thermal Properties

Latent Heat of Fusion, J/g 210
300
Maximum Temperature: Mechanical, °C 200
1080
Melting Completion (Liquidus), °C 1080
1420
Melting Onset (Solidus), °C 950
1380
Specific Heat Capacity, J/kg-K 380
480
Thermal Expansion, µm/m-K 17
13

Otherwise Unclassified Properties

Base Metal Price, % relative 30
22
Density, g/cm3 9.0
7.8
Embodied Carbon, kg CO2/kg material 2.6
4.8
Embodied Energy, MJ/kg 41
68
Embodied Water, L/kg 310
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 29
150
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 280
270
Stiffness to Weight: Axial, points 7.1
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 9.0 to 10
23
Strength to Weight: Bending, points 11 to 12
21
Thermal Shock Resistance, points 10 to 12
18

Alloy Composition

Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
20.5 to 23.5
Copper (Cu), % 98 to 99.2
0
Iron (Fe), % 0
51.9 to 62.1
Lead (Pb), % 0.8 to 1.5
0
Manganese (Mn), % 0
4.0 to 6.0
Molybdenum (Mo), % 0
1.5 to 3.0
Nickel (Ni), % 0
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
0.1 to 0.3
Residuals, % 0 to 0.5
0