Grade 20 Titanium vs. S21904 Stainless Steel
Grade 20 titanium belongs to the titanium alloys classification, while S21904 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is grade 20 titanium and the bottom bar is S21904 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 200 |
| Elongation at Break, % | 5.7 to 17 | |
| 17 to 51 |
| Fatigue Strength, MPa | 550 to 630 | |
| 380 to 550 |
| Poisson's Ratio | 0.32 | |
| 0.28 |
| Shear Modulus, GPa | 47 | |
| 78 |
| Shear Strength, MPa | 560 to 740 | |
| 510 to 620 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1270 | |
| 700 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 850 to 1190 | |
| 390 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 370 | |
| 980 |
| Melting Completion (Liquidus), °C | 1660 | |
| 1400 |
| Melting Onset (Solidus), °C | 1600 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 520 | |
| 480 |
| Thermal Expansion, µm/m-K | 9.6 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 5.0 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 52 | |
| 3.0 |
| Embodied Energy, MJ/kg | 860 | |
| 43 |
| Embodied Water, L/kg | 350 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 150 | |
| 160 to 310 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2940 to 5760 | |
| 380 to 2070 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 33 | |
| 25 |
| Strength to Weight: Axial, points | 50 to 70 | |
| 25 to 36 |
| Strength to Weight: Bending, points | 41 to 52 | |
| 23 to 29 |
| Thermal Shock Resistance, points | 55 to 77 | |
| 15 to 21 |
Alloy Composition
| Aluminum (Al), % | 3.0 to 4.0 | |
| 0 |
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.040 |
| Chromium (Cr), % | 5.5 to 6.5 | |
| 19 to 21.5 |
| Hydrogen (H), % | 0 to 0.020 | |
| 0 |
| Iron (Fe), % | 0 to 0.3 | |
| 59.5 to 67.4 |
| Manganese (Mn), % | 0 | |
| 8.0 to 10 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 5.5 to 7.5 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0.15 to 0.4 |
| Oxygen (O), % | 0 to 0.12 | |
| 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 0.030 |
| Titanium (Ti), % | 71 to 77 | |
| 0 |
| Vanadium (V), % | 7.5 to 8.5 | |
| 0 |
| Zirconium (Zr), % | 3.5 to 4.5 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |