Grade 38 Titanium vs. SAE-AISI 1055 Steel
Grade 38 titanium belongs to the titanium alloys classification, while SAE-AISI 1055 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is grade 38 titanium and the bottom bar is SAE-AISI 1055 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 190 |
| Elongation at Break, % | 11 | |
| 11 to 14 |
| Fatigue Strength, MPa | 530 | |
| 260 to 390 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Reduction in Area, % | 29 | |
| 34 to 45 |
| Shear Modulus, GPa | 40 | |
| 72 |
| Shear Strength, MPa | 600 | |
| 440 to 450 |
| Tensile Strength: Ultimate (UTS), MPa | 1000 | |
| 730 to 750 |
| Tensile Strength: Yield (Proof), MPa | 910 | |
| 400 to 630 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 400 |
| Melting Completion (Liquidus), °C | 1620 | |
| 1460 |
| Melting Onset (Solidus), °C | 1570 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 470 |
| Thermal Conductivity, W/m-K | 8.0 | |
| 51 |
| Thermal Expansion, µm/m-K | 9.3 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.2 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.4 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 36 | |
| 1.8 |
| Density, g/cm3 | 4.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 35 | |
| 1.4 |
| Embodied Energy, MJ/kg | 560 | |
| 18 |
| Embodied Water, L/kg | 160 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
| 80 to 85 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3840 | |
| 440 to 1070 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 24 |
| Strength to Weight: Axial, points | 62 | |
| 26 |
| Strength to Weight: Bending, points | 49 | |
| 23 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 14 |
| Thermal Shock Resistance, points | 72 | |
| 23 to 24 |
Alloy Composition
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| Aluminum (Al), % | 3.5 to 4.5 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0.5 to 0.6 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 1.2 to 1.8 | |
| 98.4 to 98.9 |
| Manganese (Mn), % | 0 | |
| 0.6 to 0.9 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0.2 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Sulfur (S), % | 0 | |
| 0 to 0.050 |
| Titanium (Ti), % | 89.9 to 93.1 | |
| 0 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |