C72900 Copper-nickel vs. Grade 21 Titanium
C72900 copper-nickel belongs to the copper alloys classification, while grade 21 titanium belongs to the titanium 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 C72900 copper-nickel and the bottom bar is grade 21 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 140 |
| Elongation at Break, % | 6.0 to 20 | |
| 9.0 to 17 |
| Poisson's Ratio | 0.34 | |
| 0.32 |
| Shear Modulus, GPa | 45 | |
| 51 |
| Shear Strength, MPa | 540 to 630 | |
| 550 to 790 |
| Tensile Strength: Ultimate (UTS), MPa | 870 to 1080 | |
| 890 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 700 to 920 | |
| 870 to 1170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 210 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 210 | |
| 310 |
| Melting Completion (Liquidus), °C | 1120 | |
| 1740 |
| Melting Onset (Solidus), °C | 950 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 380 | |
| 500 |
| Thermal Conductivity, W/m-K | 29 | |
| 7.5 |
| Thermal Expansion, µm/m-K | 17 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 39 | |
| 60 |
| Density, g/cm3 | 8.8 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 4.6 | |
| 32 |
| Embodied Energy, MJ/kg | 72 | |
| 490 |
| Embodied Water, L/kg | 360 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 49 to 210 | |
| 110 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2030 to 3490 | |
| 2760 to 5010 |
| Stiffness to Weight: Axial, points | 7.6 | |
| 14 |
| Stiffness to Weight: Bending, points | 19 | |
| 32 |
| Strength to Weight: Axial, points | 27 to 34 | |
| 46 to 69 |
| Strength to Weight: Bending, points | 23 to 27 | |
| 38 to 50 |
| Thermal Diffusivity, mm2/s | 8.6 | |
| 2.8 |
| Thermal Shock Resistance, points | 31 to 38 | |
| 66 to 100 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 | |
| 0 to 0.050 |
| Copper (Cu), % | 74.1 to 78 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.5 | |
| 0 to 0.4 |
| Lead (Pb), % | 0 to 0.020 | |
| 0 |
| Magnesium (Mg), % | 0 to 0.15 | |
| 0 |
| Manganese (Mn), % | 0 to 0.3 | |
| 0 |
| Molybdenum (Mo), % | 0 | |
| 14 to 16 |
| Nickel (Ni), % | 14.5 to 15.5 | |
| 0 |
| Niobium (Nb), % | 0 to 0.1 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.17 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.25 |
| Tin (Sn), % | 7.5 to 8.5 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 76 to 81.2 |
| Zinc (Zn), % | 0 to 0.5 | |
| 0 |
| Residuals, % | 0 to 0.3 | |
| 0 to 0.4 |