Grade 21 Titanium vs. EN 1.4107 Stainless Steel
Grade 21 titanium belongs to the titanium alloys classification, while EN 1.4107 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is grade 21 titanium and the bottom bar is EN 1.4107 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 190 |
| Elongation at Break, % | 9.0 to 17 | |
| 18 to 21 |
| Fatigue Strength, MPa | 550 to 660 | |
| 260 to 350 |
| Poisson's Ratio | 0.32 | |
| 0.28 |
| Shear Modulus, GPa | 51 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1340 | |
| 620 to 700 |
| Tensile Strength: Yield (Proof), MPa | 870 to 1170 | |
| 400 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 740 |
| Melting Completion (Liquidus), °C | 1740 | |
| 1450 |
| Melting Onset (Solidus), °C | 1690 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 480 |
| Thermal Conductivity, W/m-K | 7.5 | |
| 27 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 7.5 |
| Density, g/cm3 | 5.4 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 2.1 |
| Embodied Energy, MJ/kg | 490 | |
| 30 |
| Embodied Water, L/kg | 180 | |
| 100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 180 | |
| 110 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2760 to 5010 | |
| 420 to 840 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 32 | |
| 25 |
| Strength to Weight: Axial, points | 46 to 69 | |
| 22 to 25 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 21 to 22 |
| Thermal Diffusivity, mm2/s | 2.8 | |
| 7.2 |
| Thermal Shock Resistance, points | 66 to 100 | |
| 22 to 25 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 |
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.1 |
| Chromium (Cr), % | 0 | |
| 11.5 to 12.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 83.8 to 87.2 |
| Manganese (Mn), % | 0 | |
| 0.5 to 0.8 |
| Molybdenum (Mo), % | 14 to 16 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0.8 to 1.5 |
| 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 0.030 |
| Silicon (Si), % | 0.15 to 0.25 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Titanium (Ti), % | 76 to 81.2 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0 to 0.080 |
| Residuals, % | 0 to 0.4 | |
| 0 |