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C18900 Copper vs. S41045 Stainless Steel

C18900 copper belongs to the copper alloys classification, while S41045 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 C18900 copper and the bottom bar is S41045 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
190
Elongation at Break, % 14 to 48
25
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 43
76
Shear Strength, MPa 190 to 300
280
Tensile Strength: Ultimate (UTS), MPa 260 to 500
430
Tensile Strength: Yield (Proof), MPa 67 to 390
230

Thermal Properties

Latent Heat of Fusion, J/g 210
270
Maximum Temperature: Mechanical, °C 200
740
Melting Completion (Liquidus), °C 1080
1450
Melting Onset (Solidus), °C 1020
1400
Specific Heat Capacity, J/kg-K 390
480
Thermal Conductivity, W/m-K 130
29
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 30
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 31
8.5
Density, g/cm3 8.9
7.8
Embodied Carbon, kg CO2/kg material 2.7
2.2
Embodied Energy, MJ/kg 42
31
Embodied Water, L/kg 310
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 65 to 95
92
Resilience: Unit (Modulus of Resilience), kJ/m3 20 to 660
140
Stiffness to Weight: Axial, points 7.2
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 8.2 to 16
16
Strength to Weight: Bending, points 10 to 16
16
Thermal Diffusivity, mm2/s 38
7.8
Thermal Shock Resistance, points 9.3 to 18
16

Alloy Composition

Aluminum (Al), % 0 to 0.010
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
12 to 13
Copper (Cu), % 97.7 to 99.15
0
Iron (Fe), % 0
83.8 to 88
Lead (Pb), % 0 to 0.020
0
Manganese (Mn), % 0.1 to 0.3
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0 to 0.6
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.050
0 to 0.040
Silicon (Si), % 0.15 to 0.4
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0.6 to 0.9
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.5
0