Grade 21 Titanium vs. EN 1.4740 Stainless Steel
Grade 21 titanium belongs to the titanium alloys classification, while EN 1.4740 stainless steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is grade 21 titanium and the bottom bar is EN 1.4740 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 200 |
| Elongation at Break, % | 9.0 to 17 | |
| 22 |
| Poisson's Ratio | 0.32 | |
| 0.28 |
| Shear Modulus, GPa | 51 | |
| 77 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 900 |
| Melting Completion (Liquidus), °C | 1740 | |
| 1420 |
| Melting Onset (Solidus), °C | 1690 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 490 |
| Thermal Conductivity, W/m-K | 7.5 | |
| 18 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 9.5 |
| Density, g/cm3 | 5.4 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 2.3 |
| Embodied Energy, MJ/kg | 490 | |
| 32 |
| Embodied Water, L/kg | 180 | |
| 120 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 32 | |
| 25 |
| Thermal Diffusivity, mm2/s | 2.8 | |
| 4.8 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 |
| Carbon (C), % | 0 to 0.050 | |
| 0.3 to 0.5 |
| Chromium (Cr), % | 0 | |
| 16 to 19 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 75.4 to 82.7 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 14 to 16 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0 to 1.0 |
| Niobium (Nb), % | 2.2 to 3.2 | |
| 0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.17 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.25 | |
| 1.0 to 2.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Titanium (Ti), % | 76 to 81.2 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |