Grade 20 Titanium vs. Ductile Cast Iron
Grade 20 titanium belongs to the titanium alloys classification, while ductile cast iron belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is grade 20 titanium and the bottom bar is ductile cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 170 to 180 |
| Elongation at Break, % | 5.7 to 17 | |
| 2.1 to 20 |
| Poisson's Ratio | 0.32 | |
| 0.28 to 0.31 |
| Shear Modulus, GPa | 47 | |
| 64 to 70 |
| Shear Strength, MPa | 560 to 740 | |
| 420 to 800 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1270 | |
| 460 to 920 |
| Tensile Strength: Yield (Proof), MPa | 850 to 1190 | |
| 310 to 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 370 | |
| 290 |
| Melting Completion (Liquidus), °C | 1660 | |
| 1160 |
| Melting Onset (Solidus), °C | 1600 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 520 | |
| 490 |
| Thermal Expansion, µm/m-K | 9.6 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 5.0 | |
| 7.1 to 7.5 |
| Embodied Carbon, kg CO2/kg material | 52 | |
| 1.5 |
| Embodied Energy, MJ/kg | 860 | |
| 21 |
| Embodied Water, L/kg | 350 | |
| 43 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 150 | |
| 17 to 80 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2940 to 5760 | |
| 280 to 1330 |
| Stiffness to Weight: Axial, points | 14 | |
| 12 to 14 |
| Stiffness to Weight: Bending, points | 33 | |
| 24 to 26 |
| Strength to Weight: Axial, points | 50 to 70 | |
| 17 to 35 |
| Strength to Weight: Bending, points | 41 to 52 | |
| 18 to 29 |
| Thermal Shock Resistance, points | 55 to 77 | |
| 17 to 35 |
Alloy Composition
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| Aluminum (Al), % | 3.0 to 4.0 | |
| 0 |
| Carbon (C), % | 0 to 0.050 | |
| 3.0 to 3.5 |
| Chromium (Cr), % | 5.5 to 6.5 | |
| 0 |
| Hydrogen (H), % | 0 to 0.020 | |
| 0 |
| Iron (Fe), % | 0 to 0.3 | |
| 93.7 to 95.5 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.12 | |
| 0 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.080 |
| Silicon (Si), % | 0 | |
| 1.5 to 2.8 |
| Titanium (Ti), % | 71 to 77 | |
| 0 |
| Vanadium (V), % | 7.5 to 8.5 | |
| 0 |
| Zirconium (Zr), % | 3.5 to 4.5 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |