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C18700 Copper vs. EN 1.4557 Stainless Steel

C18700 copper belongs to the copper alloys classification, while EN 1.4557 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 C18700 copper and the bottom bar is EN 1.4557 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
80
Tensile Strength: Ultimate (UTS), MPa 290 to 330
560
Tensile Strength: Yield (Proof), MPa 230 to 250
300

Thermal Properties

Latent Heat of Fusion, J/g 210
300
Maximum Temperature: Mechanical, °C 200
1090
Melting Completion (Liquidus), °C 1080
1460
Melting Onset (Solidus), °C 950
1420
Specific Heat Capacity, J/kg-K 380
460
Thermal Conductivity, W/m-K 380
15
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 98
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 99
2.2

Otherwise Unclassified Properties

Base Metal Price, % relative 30
29
Density, g/cm3 9.0
8.0
Embodied Carbon, kg CO2/kg material 2.6
5.6
Embodied Energy, MJ/kg 41
76
Embodied Water, L/kg 310
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 29
190
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 280
210
Stiffness to Weight: Axial, points 7.1
14
Stiffness to Weight: Bending, points 18
24
Strength to Weight: Axial, points 9.0 to 10
19
Strength to Weight: Bending, points 11 to 12
19
Thermal Diffusivity, mm2/s 110
4.0
Thermal Shock Resistance, points 10 to 12
12

Alloy Composition

Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0
19.5 to 20.5
Copper (Cu), % 98 to 99.2
0.5 to 1.0
Iron (Fe), % 0
49.5 to 56.3
Lead (Pb), % 0.8 to 1.5
0
Manganese (Mn), % 0
0 to 1.2
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Residuals, % 0 to 0.5
0