Austempered Cast Iron vs. Grade 20 Titanium
Austempered cast iron belongs to the iron alloys classification, while grade 20 titanium belongs to the titanium alloys. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is austempered cast iron and the bottom bar is grade 20 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 120 |
| Elongation at Break, % | 1.1 to 13 | |
| 5.7 to 17 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 62 to 69 | |
| 47 |
| Tensile Strength: Ultimate (UTS), MPa | 860 to 1800 | |
| 900 to 1270 |
| Tensile Strength: Yield (Proof), MPa | 560 to 1460 | |
| 850 to 1190 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 400 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1660 |
| Melting Onset (Solidus), °C | 1340 | |
| 1600 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 520 |
| Thermal Expansion, µm/m-K | 13 | |
| 9.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.5 | |
| 5.0 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 52 |
| Embodied Energy, MJ/kg | 25 | |
| 860 |
| Embodied Water, L/kg | 48 | |
| 350 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 19 to 95 | |
| 71 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 880 to 3970 | |
| 2940 to 5760 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 33 |
| Strength to Weight: Axial, points | 32 to 66 | |
| 50 to 70 |
| Strength to Weight: Bending, points | 27 to 44 | |
| 41 to 52 |
| Thermal Shock Resistance, points | 25 to 53 | |
| 55 to 77 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.050 | |
| 3.0 to 4.0 |
| Arsenic (As), % | 0 to 0.020 | |
| 0 |
| Carbon (C), % | 3.4 to 3.8 | |
| 0 to 0.050 |
| Chromium (Cr), % | 0 to 0.1 | |
| 5.5 to 6.5 |
| Copper (Cu), % | 0 to 0.8 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.020 |
| Iron (Fe), % | 89.6 to 94 | |
| 0 to 0.3 |
| Magnesium (Mg), % | 0 to 0.040 | |
| 0 |
| Manganese (Mn), % | 0.3 to 0.4 | |
| 0 |
| Molybdenum (Mo), % | 0 to 0.3 | |
| 3.5 to 4.5 |
| Nickel (Ni), % | 0 to 2.0 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.12 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Selenium (Se), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 2.3 to 2.7 | |
| 0 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 |
| Tin (Sn), % | 0 to 0.020 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 71 to 77 |
| Vanadium (V), % | 0 to 0.1 | |
| 7.5 to 8.5 |
| Zirconium (Zr), % | 0 | |
| 3.5 to 4.5 |
| Residuals, % | 0 | |
| 0 to 0.4 |