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C18700 Copper vs. EN 1.4374 Stainless Steel

C18700 copper belongs to the copper alloys classification, while EN 1.4374 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is C18700 copper and the bottom bar is EN 1.4374 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 9.0 to 9.6
40
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 43
77
Shear Strength, MPa 170 to 190
550
Tensile Strength: Ultimate (UTS), MPa 290 to 330
800
Tensile Strength: Yield (Proof), MPa 230 to 250
400

Thermal Properties

Latent Heat of Fusion, J/g 210
290
Maximum Temperature: Mechanical, °C 200
920
Melting Completion (Liquidus), °C 1080
1400
Melting Onset (Solidus), °C 950
1360
Specific Heat Capacity, J/kg-K 380
480
Thermal Conductivity, W/m-K 380
15
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 98
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 99
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 30
14
Density, g/cm3 9.0
7.7
Embodied Carbon, kg CO2/kg material 2.6
2.9
Embodied Energy, MJ/kg 41
42
Embodied Water, L/kg 310
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 29
270
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 280
400
Stiffness to Weight: Axial, points 7.1
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 9.0 to 10
29
Strength to Weight: Bending, points 11 to 12
25
Thermal Diffusivity, mm2/s 110
4.0
Thermal Shock Resistance, points 10 to 12
17

Alloy Composition

Carbon (C), % 0
0.050 to 0.1
Chromium (Cr), % 0
17.5 to 18.5
Copper (Cu), % 98 to 99.2
0 to 0.4
Iron (Fe), % 0
63.5 to 67.9
Lead (Pb), % 0.8 to 1.5
0
Manganese (Mn), % 0
9.0 to 10
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
5.0 to 6.0
Nitrogen (N), % 0
0.25 to 0.32
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.3 to 0.6
Sulfur (S), % 0
0 to 0.030
Residuals, % 0 to 0.5
0