Grade 18 Titanium vs. N08800 Stainless Steel
Grade 18 titanium belongs to the titanium alloys classification, while N08800 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is grade 18 titanium and the bottom bar is N08800 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 200 |
| Elongation at Break, % | 11 to 17 | |
| 4.5 to 34 |
| Fatigue Strength, MPa | 330 to 480 | |
| 150 to 390 |
| Poisson's Ratio | 0.32 | |
| 0.28 |
| Shear Modulus, GPa | 40 | |
| 77 |
| Shear Strength, MPa | 420 to 590 | |
| 340 to 580 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 500 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 190 to 830 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1640 | |
| 1390 |
| Melting Onset (Solidus), °C | 1590 | |
| 1360 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 480 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 12 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 1.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 1.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 5.3 |
| Embodied Energy, MJ/kg | 670 | |
| 76 |
| Embodied Water, L/kg | 270 | |
| 200 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
| 42 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1380 to 3110 | |
| 96 to 1740 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 35 | |
| 24 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 18 to 35 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 18 to 28 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 3.0 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 13 to 25 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 0.15 to 0.6 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.1 |
| Chromium (Cr), % | 0 | |
| 19 to 23 |
| Copper (Cu), % | 0 | |
| 0 to 0.75 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 39.5 to 50.7 |
| Manganese (Mn), % | 0 | |
| 0 to 1.5 |
| Nickel (Ni), % | 0 | |
| 30 to 35 |
| 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 0.045 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.015 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 0.15 to 0.6 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |