Grade 18 Titanium vs. C71640 Copper-nickel
Grade 18 titanium belongs to the titanium alloys classification, while C71640 copper-nickel belongs to the copper alloys. There are 25 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 grade 18 titanium and the bottom bar is C71640 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 140 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 40 | |
| 52 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 490 to 630 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 190 to 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 240 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 260 |
| Melting Completion (Liquidus), °C | 1640 | |
| 1180 |
| Melting Onset (Solidus), °C | 1590 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 410 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 29 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 7.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 5.0 |
| Embodied Energy, MJ/kg | 670 | |
| 73 |
| Embodied Water, L/kg | 270 | |
| 280 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1380 to 3110 | |
| 130 to 750 |
| Stiffness to Weight: Axial, points | 13 | |
| 8.7 |
| Stiffness to Weight: Bending, points | 35 | |
| 20 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 15 to 20 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 16 to 18 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 8.2 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 16 to 21 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0 |
| Copper (Cu), % | 0 | |
| 61.7 to 67.8 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 1.7 to 2.3 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0 | |
| 1.5 to 2.5 |
| Nickel (Ni), % | 0 | |
| 29 to 32 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.15 | |
| 0 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 0 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 1.0 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.5 |