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AISI 418 Stainless Steel vs. C81400 Copper

AISI 418 stainless steel belongs to the iron alloys classification, while C81400 copper belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is C81400 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Elongation at Break, % 17
11
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 77
41
Tensile Strength: Ultimate (UTS), MPa 1100
370
Tensile Strength: Yield (Proof), MPa 850
250

Thermal Properties

Latent Heat of Fusion, J/g 270
210
Maximum Temperature: Mechanical, °C 770
200
Melting Completion (Liquidus), °C 1500
1090
Melting Onset (Solidus), °C 1460
1070
Specific Heat Capacity, J/kg-K 470
390
Thermal Conductivity, W/m-K 25
260
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
60
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
61

Otherwise Unclassified Properties

Base Metal Price, % relative 15
33
Density, g/cm3 8.0
8.9
Embodied Carbon, kg CO2/kg material 2.9
2.8
Embodied Energy, MJ/kg 41
45
Embodied Water, L/kg 110
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
36
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
260
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 24
18
Strength to Weight: Axial, points 38
11
Strength to Weight: Bending, points 29
13
Thermal Diffusivity, mm2/s 6.7
75
Thermal Shock Resistance, points 40
13

Alloy Composition

Beryllium (Be), % 0
0.020 to 0.1
Carbon (C), % 0.15 to 0.2
0
Chromium (Cr), % 12 to 14
0.6 to 1.0
Copper (Cu), % 0
98.4 to 99.38
Iron (Fe), % 78.5 to 83.6
0
Manganese (Mn), % 0 to 0.5
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 1.8 to 2.2
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 2.5 to 3.5
0
Residuals, % 0
0 to 0.5