Grade 5 Titanium vs. SAE-AISI 81B45 Steel
Grade 5 titanium belongs to the titanium alloys classification, while SAE-AISI 81B45 steel belongs to the iron alloys. There are 30 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 grade 5 titanium and the bottom bar is SAE-AISI 81B45 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 190 |
| Elongation at Break, % | 8.6 to 11 | |
| 12 to 24 |
| Fatigue Strength, MPa | 530 to 630 | |
| 250 to 350 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 40 | |
| 73 |
| Shear Strength, MPa | 600 to 710 | |
| 340 to 400 |
| Tensile Strength: Ultimate (UTS), MPa | 1000 to 1190 | |
| 540 to 670 |
| Tensile Strength: Yield (Proof), MPa | 910 to 1110 | |
| 350 to 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 410 |
| Melting Completion (Liquidus), °C | 1610 | |
| 1460 |
| Melting Onset (Solidus), °C | 1650 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 560 | |
| 470 |
| Thermal Conductivity, W/m-K | 6.8 | |
| 40 |
| Thermal Expansion, µm/m-K | 8.9 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.0 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.0 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 36 | |
| 2.3 |
| Density, g/cm3 | 4.4 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 38 | |
| 1.5 |
| Embodied Energy, MJ/kg | 610 | |
| 20 |
| Embodied Water, L/kg | 200 | |
| 49 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 to 110 | |
| 77 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3980 to 5880 | |
| 320 to 840 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 24 |
| Strength to Weight: Axial, points | 62 to 75 | |
| 19 to 24 |
| Strength to Weight: Bending, points | 50 to 56 | |
| 19 to 22 |
| Thermal Diffusivity, mm2/s | 2.7 | |
| 11 |
| Thermal Shock Resistance, points | 76 to 91 | |
| 17 to 21 |
Alloy Composition
| Aluminum (Al), % | 5.5 to 6.8 | |
| 0 |
| Boron (B), % | 0 | |
| 0.00050 to 0.0030 |
| Carbon (C), % | 0 to 0.080 | |
| 0.43 to 0.48 |
| Chromium (Cr), % | 0 | |
| 0.35 to 0.55 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 97 to 98 |
| Manganese (Mn), % | 0 | |
| 0.75 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.080 to 0.15 |
| Nickel (Ni), % | 0 | |
| 0.2 to 0.4 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 |
| Oxygen (O), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 | |
| 0 to 0.040 |
| Titanium (Ti), % | 87.4 to 91 | |
| 0 |
| Vanadium (V), % | 3.5 to 4.5 | |
| 0 |
| Yttrium (Y), % | 0 to 0.0050 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |