ASTM A302 Alloy Steel vs. Grade 31 Titanium
ASTM A302 alloy steel belongs to the iron alloys classification, while grade 31 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is grade 31 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 110 |
| Elongation at Break, % | 20 to 23 | |
| 20 |
| Fatigue Strength, MPa | 250 to 280 | |
| 300 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 73 | |
| 41 |
| Shear Strength, MPa | 370 to 390 | |
| 320 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 620 | |
| 510 |
| Tensile Strength: Yield (Proof), MPa | 350 to 390 | |
| 450 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 420 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 320 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1660 |
| Melting Onset (Solidus), °C | 1420 | |
| 1610 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 540 |
| Thermal Conductivity, W/m-K | 39 to 51 | |
| 21 |
| Thermal Expansion, µm/m-K | 13 | |
| 8.7 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 to 7.4 | |
| 3.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 to 8.4 | |
| 6.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 to 7.9 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.6 | |
| 36 |
| Embodied Energy, MJ/kg | 20 to 21 | |
| 600 |
| Embodied Water, L/kg | 48 to 50 | |
| 230 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 99 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 330 to 410 | |
| 940 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 35 |
| Strength to Weight: Axial, points | 21 to 22 | |
| 32 |
| Strength to Weight: Bending, points | 20 to 21 | |
| 32 |
| Thermal Diffusivity, mm2/s | 10 to 14 | |
| 8.5 |
| Thermal Shock Resistance, points | 17 to 18 | |
| 39 |