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C15900 Copper vs. S82121 Stainless Steel

C15900 copper belongs to the copper alloys classification, while S82121 stainless steel belongs to the iron alloys. There are 29 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 C15900 copper and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Elongation at Break, % 6.5
28
Poisson's Ratio 0.34
0.27
Shear Modulus, GPa 43
78
Shear Strength, MPa 420
470
Tensile Strength: Ultimate (UTS), MPa 720
730
Tensile Strength: Yield (Proof), MPa 240
510

Thermal Properties

Latent Heat of Fusion, J/g 210
290
Maximum Temperature: Mechanical, °C 200
1020
Melting Completion (Liquidus), °C 1080
1430
Melting Onset (Solidus), °C 1030
1380
Specific Heat Capacity, J/kg-K 390
480
Thermal Conductivity, W/m-K 280
15
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 48
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 49
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 30
14
Density, g/cm3 8.8
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.8
Embodied Energy, MJ/kg 45
40
Embodied Water, L/kg 310
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
180
Resilience: Unit (Modulus of Resilience), kJ/m3 260
660
Stiffness to Weight: Axial, points 7.2
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 23
26
Strength to Weight: Bending, points 20
23
Thermal Diffusivity, mm2/s 80
4.0
Thermal Shock Resistance, points 26
20

Alloy Composition

Aluminum (Al), % 0.76 to 0.84
0
Carbon (C), % 0.27 to 0.33
0 to 0.035
Chromium (Cr), % 0
21 to 23
Copper (Cu), % 97.5 to 97.9
0.2 to 1.2
Iron (Fe), % 0 to 0.040
66.7 to 75.4
Manganese (Mn), % 0
1.0 to 2.5
Molybdenum (Mo), % 0
0.3 to 1.3
Nickel (Ni), % 0
2.0 to 4.0
Nitrogen (N), % 0
0.15 to 0.25
Oxygen (O), % 0.4 to 0.54
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0.66 to 0.74
0