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C81400 Copper vs. S17400 Stainless Steel

C81400 copper belongs to the copper alloys classification, while S17400 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is C81400 copper and the bottom bar is S17400 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
190
Elongation at Break, % 11
11 to 21
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 41
75
Tensile Strength: Ultimate (UTS), MPa 370
910 to 1390
Tensile Strength: Yield (Proof), MPa 250
580 to 1250

Thermal Properties

Latent Heat of Fusion, J/g 210
280
Maximum Temperature: Mechanical, °C 200
850
Melting Completion (Liquidus), °C 1090
1440
Melting Onset (Solidus), °C 1070
1400
Specific Heat Capacity, J/kg-K 390
480
Thermal Conductivity, W/m-K 260
17
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 60
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 61
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 33
14
Density, g/cm3 8.9
7.8
Embodied Carbon, kg CO2/kg material 2.8
2.7
Embodied Energy, MJ/kg 45
39
Embodied Water, L/kg 310
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 260
880 to 4060
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 18
25
Strength to Weight: Axial, points 11
32 to 49
Strength to Weight: Bending, points 13
27 to 35
Thermal Diffusivity, mm2/s 75
4.5
Thermal Shock Resistance, points 13
30 to 46

Alloy Composition

Beryllium (Be), % 0.020 to 0.1
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0.6 to 1.0
15 to 17
Copper (Cu), % 98.4 to 99.38
3.0 to 5.0
Iron (Fe), % 0
70.4 to 78.9
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
3.0 to 5.0
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Residuals, % 0 to 0.5
0