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C18400 Copper vs. S40920 Stainless Steel

C18400 copper belongs to the copper alloys classification, while S40920 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is C18400 copper and the bottom bar is S40920 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
190
Elongation at Break, % 13 to 50
22
Poisson's Ratio 0.34
0.28
Rockwell B Hardness 16 to 84
77
Shear Modulus, GPa 44
75
Shear Strength, MPa 190 to 310
270
Tensile Strength: Ultimate (UTS), MPa 270 to 490
430
Tensile Strength: Yield (Proof), MPa 110 to 480
190

Thermal Properties

Latent Heat of Fusion, J/g 210
270
Maximum Temperature: Mechanical, °C 200
710
Melting Completion (Liquidus), °C 1080
1450
Melting Onset (Solidus), °C 1070
1400
Specific Heat Capacity, J/kg-K 390
480
Thermal Conductivity, W/m-K 320
26
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 80
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 81
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 31
6.5
Density, g/cm3 8.9
7.7
Embodied Carbon, kg CO2/kg material 2.6
2.0
Embodied Energy, MJ/kg 41
28
Embodied Water, L/kg 310
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 63 to 120
78
Resilience: Unit (Modulus of Resilience), kJ/m3 54 to 980
97
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 8.5 to 15
15
Strength to Weight: Bending, points 10 to 16
16
Thermal Diffusivity, mm2/s 94
6.9
Thermal Shock Resistance, points 9.6 to 17
15

Alloy Composition

Arsenic (As), % 0 to 0.0050
0
Calcium (Ca), % 0 to 0.0050
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0.4 to 1.2
10.5 to 11.7
Copper (Cu), % 97.2 to 99.6
0
Iron (Fe), % 0 to 0.15
85.1 to 89.4
Lithium (Li), % 0 to 0.050
0
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.050
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0.15 to 0.5
Zinc (Zn), % 0 to 0.7
0
Residuals, % 0 to 0.5
0