SAE-AISI T8 Steel vs. Grade 25 Titanium
SAE-AISI T8 steel belongs to the iron alloys classification, while grade 25 titanium belongs to the titanium alloys. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI T8 steel and the bottom bar is grade 25 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 110 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 78 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 2140 | |
| 1000 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 410 |
| Melting Completion (Liquidus), °C | 1730 | |
| 1610 |
| Melting Onset (Solidus), °C | 1670 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 560 |
| Thermal Conductivity, W/m-K | 18 | |
| 7.1 |
| Thermal Expansion, µm/m-K | 12 | |
| 9.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.0 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 43 |
| Embodied Energy, MJ/kg | 160 | |
| 700 |
| Embodied Water, L/kg | 120 | |
| 320 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 13 |
| Stiffness to Weight: Bending, points | 22 | |
| 35 |
| Strength to Weight: Axial, points | 24 to 66 | |
| 62 |
| Strength to Weight: Bending, points | 21 to 41 | |
| 50 |
| Thermal Diffusivity, mm2/s | 4.8 | |
| 2.8 |
| Thermal Shock Resistance, points | 24 to 66 | |
| 71 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 5.5 to 6.8 |
| Carbon (C), % | 0.75 to 0.85 | |
| 0 to 0.080 |
| Chromium (Cr), % | 3.8 to 4.5 | |
| 0 |
| Cobalt (Co), % | 4.3 to 5.8 | |
| 0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.013 |
| Iron (Fe), % | 69.3 to 75.4 | |
| 0 to 0.4 |
| Manganese (Mn), % | 0.2 to 0.4 | |
| 0 |
| Molybdenum (Mo), % | 0.4 to 1.0 | |
| 0 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0.3 to 0.8 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 | |
| 0 to 0.2 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 0.2 to 0.4 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 86.7 to 90.6 |
| Tungsten (W), % | 13.3 to 14.8 | |
| 0 |
| Vanadium (V), % | 1.8 to 2.4 | |
| 3.5 to 4.5 |
| Residuals, % | 0 | |
| 0 to 0.4 |