Grade 21 Titanium vs. Austenitic Nodular Cast Iron
Grade 21 titanium belongs to the titanium alloys classification, while austenitic nodular cast iron belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is grade 21 titanium and the bottom bar is austenitic nodular cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 180 to 190 |
| Elongation at Break, % | 9.0 to 17 | |
| 6.8 to 34 |
| Poisson's Ratio | 0.32 | |
| 0.29 to 0.3 |
| Shear Modulus, GPa | 51 | |
| 70 to 72 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1340 | |
| 430 to 500 |
| Tensile Strength: Yield (Proof), MPa | 870 to 1170 | |
| 190 to 240 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 280 to 350 |
| Melting Completion (Liquidus), °C | 1740 | |
| 1340 to 1400 |
| Melting Onset (Solidus), °C | 1690 | |
| 1300 to 1360 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 470 to 490 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 13 to 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 16 to 25 |
| Density, g/cm3 | 5.4 | |
| 7.7 to 8.0 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 3.5 to 4.9 |
| Embodied Energy, MJ/kg | 490 | |
| 48 to 68 |
| Embodied Water, L/kg | 180 | |
| 91 to 120 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 180 | |
| 24 to 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2760 to 5010 | |
| 98 to 160 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 32 | |
| 24 to 25 |
| Strength to Weight: Axial, points | 46 to 69 | |
| 15 to 18 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 16 to 18 |
| Thermal Shock Resistance, points | 66 to 100 | |
| 12 to 15 |