C72800 Copper-nickel vs. Grade 21 Titanium
C72800 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 (5, in this case) are not shown.
For each property being compared, the top bar is C72800 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, % | 3.9 to 23 | |
| 9.0 to 17 |
| Poisson's Ratio | 0.34 | |
| 0.32 |
| Shear Modulus, GPa | 44 | |
| 51 |
| Shear Strength, MPa | 330 to 740 | |
| 550 to 790 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 1270 | |
| 890 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 250 to 1210 | |
| 870 to 1170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 210 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 200 | |
| 310 |
| Melting Completion (Liquidus), °C | 1080 | |
| 1740 |
| Melting Onset (Solidus), °C | 920 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 380 | |
| 500 |
| Thermal Conductivity, W/m-K | 55 | |
| 7.5 |
| Thermal Expansion, µm/m-K | 17 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 38 | |
| 60 |
| Density, g/cm3 | 8.8 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 4.4 | |
| 32 |
| Embodied Energy, MJ/kg | 68 | |
| 490 |
| Embodied Water, L/kg | 360 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 37 to 99 | |
| 110 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 5650 | |
| 2760 to 5010 |
| Stiffness to Weight: Axial, points | 7.4 | |
| 14 |
| Stiffness to Weight: Bending, points | 19 | |
| 32 |
| Strength to Weight: Axial, points | 17 to 40 | |
| 46 to 69 |
| Strength to Weight: Bending, points | 16 to 30 | |
| 38 to 50 |
| Thermal Diffusivity, mm2/s | 17 | |
| 2.8 |
| Thermal Shock Resistance, points | 19 to 45 | |
| 66 to 100 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.1 | |
| 2.5 to 3.5 |
| Antimony (Sb), % | 0 to 0.020 | |
| 0 |
| Bismuth (Bi), % | 0 to 0.0010 | |
| 0 |
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.050 |
| Copper (Cu), % | 78.3 to 82.8 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.5 | |
| 0 to 0.4 |
| Lead (Pb), % | 0 to 0.0050 | |
| 0 |
| Magnesium (Mg), % | 0.0050 to 0.15 | |
| 0 |
| Manganese (Mn), % | 0.050 to 0.3 | |
| 0 |
| Molybdenum (Mo), % | 0 | |
| 14 to 16 |
| Nickel (Ni), % | 9.5 to 10.5 | |
| 0 |
| Niobium (Nb), % | 0.1 to 0.3 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.17 |
| Phosphorus (P), % | 0 to 0.0050 | |
| 0 |
| Silicon (Si), % | 0 to 0.050 | |
| 0.15 to 0.25 |
| Sulfur (S), % | 0 to 0.0025 | |
| 0 |
| Tin (Sn), % | 7.5 to 8.5 | |
| 0 |
| Titanium (Ti), % | 0 to 0.010 | |
| 76 to 81.2 |
| Zinc (Zn), % | 0 to 1.0 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.4 |