C18700 Copper vs. SAE-AISI M34 Steel
C18700 copper belongs to the copper alloys classification, while SAE-AISI M34 steel belongs to the iron alloys. There are 21 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 C18700 copper and the bottom bar is SAE-AISI M34 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 200 |
| Poisson's Ratio | 0.34 | |
| 0.29 |
| Shear Modulus, GPa | 43 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 290 to 330 | |
| 800 to 2170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 210 | |
| 270 |
| Melting Completion (Liquidus), °C | 1080 | |
| 1540 |
| Melting Onset (Solidus), °C | 950 | |
| 1500 |
| Specific Heat Capacity, J/kg-K | 380 | |
| 450 |
| Thermal Conductivity, W/m-K | 380 | |
| 24 |
| Thermal Expansion, µm/m-K | 17 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 30 | |
| 32 |
| Density, g/cm3 | 9.0 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 9.5 |
| Embodied Energy, MJ/kg | 41 | |
| 140 |
| Embodied Water, L/kg | 310 | |
| 150 |
Common Calculations
| Stiffness to Weight: Axial, points | 7.1 | |
| 14 |
| Stiffness to Weight: Bending, points | 18 | |
| 24 |
| Strength to Weight: Axial, points | 9.0 to 10 | |
| 27 to 74 |
| Strength to Weight: Bending, points | 11 to 12 | |
| 23 to 46 |
| Thermal Diffusivity, mm2/s | 110 | |
| 6.7 |
| Thermal Shock Resistance, points | 10 to 12 | |
| 25 to 67 |
Alloy Composition
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| Carbon (C), % | 0 | |
| 0.85 to 0.92 |
| Chromium (Cr), % | 0 | |
| 3.5 to 4.0 |
| Cobalt (Co), % | 0 | |
| 7.8 to 8.8 |
| Copper (Cu), % | 98 to 99.2 | |
| 0 to 0.25 |
| Iron (Fe), % | 0 | |
| 71.3 to 76.5 |
| Lead (Pb), % | 0.8 to 1.5 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 0.15 to 0.4 |
| Molybdenum (Mo), % | 0 | |
| 7.8 to 9.2 |
| Nickel (Ni), % | 0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 | |
| 0.2 to 0.45 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tungsten (W), % | 0 | |
| 1.4 to 2.1 |
| Vanadium (V), % | 0 | |
| 1.9 to 2.3 |
| Residuals, % | 0 to 0.5 | |
| 0 |