Grade 18 Titanium vs. ASTM A732 Cast Steel
Grade 18 titanium belongs to the titanium alloys classification, while ASTM A732 cast steel belongs to the iron alloys. There are 28 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 grade 18 titanium and the bottom bar is ASTM A732 cast steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 190 |
| Elongation at Break, % | 11 to 17 | |
| 4.0 to 25 |
| Fatigue Strength, MPa | 330 to 480 | |
| 230 to 750 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 40 | |
| 72 to 73 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 460 to 1470 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 310 to 1340 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 250 to 260 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 400 to 430 |
| Melting Completion (Liquidus), °C | 1640 | |
| 1440 to 1460 |
| Melting Onset (Solidus), °C | 1590 | |
| 1400 to 1420 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 470 to 480 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 39 to 50 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 7.1 to 7.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 8.2 to 8.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 1.4 to 1.7 |
| Embodied Energy, MJ/kg | 670 | |
| 19 to 24 |
| Embodied Water, L/kg | 270 | |
| 47 to 54 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
| 45 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1380 to 3110 | |
| 260 to 4770 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 24 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 16 to 52 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 17 to 37 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 10 to 14 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 14 to 43 |