Grade 18 Titanium vs. S66286 Stainless Steel
Grade 18 titanium belongs to the titanium alloys classification, while S66286 stainless steel belongs to the iron alloys. There are 29 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 S66286 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 190 |
| Elongation at Break, % | 11 to 17 | |
| 17 to 40 |
| Fatigue Strength, MPa | 330 to 480 | |
| 240 to 410 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 40 | |
| 75 |
| Shear Strength, MPa | 420 to 590 | |
| 420 to 630 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 620 to 1020 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 280 to 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 920 |
| Melting Completion (Liquidus), °C | 1640 | |
| 1430 |
| Melting Onset (Solidus), °C | 1590 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 470 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 15 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 1.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.2 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 6.0 |
| Embodied Energy, MJ/kg | 670 | |
| 87 |
| Embodied Water, L/kg | 270 | |
| 170 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
| 150 to 200 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1380 to 3110 | |
| 190 to 1150 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 35 | |
| 24 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 22 to 36 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 20 to 28 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 4.0 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 13 to 22 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 to 0.35 |
| Boron (B), % | 0 | |
| 0.0010 to 0.010 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.080 |
| Chromium (Cr), % | 0 | |
| 13.5 to 16 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 49.1 to 59.5 |
| Manganese (Mn), % | 0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 1.0 to 1.5 |
| Nickel (Ni), % | 0 | |
| 24 to 27 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.15 | |
| 0 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 1.9 to 2.4 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0.1 to 0.5 |
| Residuals, % | 0 to 0.4 | |
| 0 |