C18700 Copper vs. Grade 18 Titanium
C18700 copper belongs to the copper alloys classification, while grade 18 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is C18700 copper and the bottom bar is grade 18 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 110 |
| Elongation at Break, % | 9.0 to 9.6 | |
| 11 to 17 |
| Poisson's Ratio | 0.34 | |
| 0.32 |
| Shear Modulus, GPa | 43 | |
| 40 |
| Shear Strength, MPa | 170 to 190 | |
| 420 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 290 to 330 | |
| 690 to 980 |
| Tensile Strength: Yield (Proof), MPa | 230 to 250 | |
| 540 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 210 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 200 | |
| 330 |
| Melting Completion (Liquidus), °C | 1080 | |
| 1640 |
| Melting Onset (Solidus), °C | 950 | |
| 1590 |
| Specific Heat Capacity, J/kg-K | 380 | |
| 550 |
| Thermal Conductivity, W/m-K | 380 | |
| 8.3 |
| Thermal Expansion, µm/m-K | 17 | |
| 9.9 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 98 | |
| 1.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 99 | |
| 2.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.0 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 41 |
| Embodied Energy, MJ/kg | 41 | |
| 670 |
| Embodied Water, L/kg | 310 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 24 to 29 | |
| 87 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 240 to 280 | |
| 1380 to 3110 |
| Stiffness to Weight: Axial, points | 7.1 | |
| 13 |
| Stiffness to Weight: Bending, points | 18 | |
| 35 |
| Strength to Weight: Axial, points | 9.0 to 10 | |
| 43 to 61 |
| Strength to Weight: Bending, points | 11 to 12 | |
| 39 to 49 |
| Thermal Diffusivity, mm2/s | 110 | |
| 3.4 |
| Thermal Shock Resistance, points | 10 to 12 | |
| 47 to 67 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 | |
| 0 to 0.080 |
| Copper (Cu), % | 98 to 99.2 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 | |
| 0 to 0.25 |
| Lead (Pb), % | 0.8 to 1.5 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.15 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Titanium (Ti), % | 0 | |
| 92.5 to 95.5 |
| Vanadium (V), % | 0 | |
| 2.0 to 3.0 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.4 |