Grade 21 Titanium vs. C72700 Copper-nickel
Grade 21 titanium belongs to the titanium alloys classification, while C72700 copper-nickel belongs to the copper alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is grade 21 titanium and the bottom bar is C72700 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 120 |
| Elongation at Break, % | 9.0 to 17 | |
| 4.0 to 36 |
| Poisson's Ratio | 0.32 | |
| 0.34 |
| Shear Modulus, GPa | 51 | |
| 44 |
| Shear Strength, MPa | 550 to 790 | |
| 310 to 620 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1340 | |
| 460 to 1070 |
| Tensile Strength: Yield (Proof), MPa | 870 to 1170 | |
| 580 to 1060 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 210 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 200 |
| Melting Completion (Liquidus), °C | 1740 | |
| 1100 |
| Melting Onset (Solidus), °C | 1690 | |
| 930 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 380 |
| Thermal Conductivity, W/m-K | 7.5 | |
| 54 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 36 |
| Density, g/cm3 | 5.4 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 4.0 |
| Embodied Energy, MJ/kg | 490 | |
| 62 |
| Embodied Water, L/kg | 180 | |
| 350 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 180 | |
| 20 to 380 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2760 to 5010 | |
| 1420 to 4770 |
| Stiffness to Weight: Axial, points | 14 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 32 | |
| 19 |
| Strength to Weight: Axial, points | 46 to 69 | |
| 14 to 34 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 15 to 26 |
| Thermal Diffusivity, mm2/s | 2.8 | |
| 16 |
| Thermal Shock Resistance, points | 66 to 100 | |
| 16 to 38 |
Alloy Composition
Deprecated: Automatic conversion of false to array is deprecated in /home/public/compare.php on line 452
| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 |
| Carbon (C), % | 0 to 0.050 | |
| 0 |
| Copper (Cu), % | 0 | |
| 82.1 to 86 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 to 0.5 |
| Lead (Pb), % | 0 | |
| 0 to 0.020 |
| Magnesium (Mg), % | 0 | |
| 0 to 0.15 |
| Manganese (Mn), % | 0 | |
| 0.050 to 0.3 |
| Molybdenum (Mo), % | 14 to 16 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 8.5 to 9.5 |
| Niobium (Nb), % | 2.2 to 3.2 | |
| 0 to 0.1 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.17 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.25 | |
| 0 |
| Tin (Sn), % | 0 | |
| 5.5 to 6.5 |
| Titanium (Ti), % | 76 to 81.2 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.5 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.3 |