EN 1.4378 Stainless Steel vs. Grade 21 Titanium
EN 1.4378 stainless steel belongs to the iron alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is EN 1.4378 stainless steel and the bottom bar is grade 21 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 140 |
| Elongation at Break, % | 14 to 34 | |
| 9.0 to 17 |
| Fatigue Strength, MPa | 340 to 550 | |
| 550 to 660 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Shear Modulus, GPa | 77 | |
| 51 |
| Shear Strength, MPa | 510 to 680 | |
| 550 to 790 |
| Tensile Strength: Ultimate (UTS), MPa | 760 to 1130 | |
| 890 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 430 to 970 | |
| 870 to 1170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 910 | |
| 310 |
| Melting Completion (Liquidus), °C | 1390 | |
| 1740 |
| Melting Onset (Solidus), °C | 1350 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 500 |
| Thermal Expansion, µm/m-K | 17 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 60 |
| Density, g/cm3 | 7.6 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 32 |
| Embodied Energy, MJ/kg | 39 | |
| 490 |
| Embodied Water, L/kg | 150 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 to 220 | |
| 110 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 470 to 2370 | |
| 2760 to 5010 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 32 |
| Strength to Weight: Axial, points | 28 to 41 | |
| 46 to 69 |
| Strength to Weight: Bending, points | 24 to 31 | |
| 38 to 50 |
| Thermal Shock Resistance, points | 16 to 23 | |
| 66 to 100 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.050 |
| Chromium (Cr), % | 17 to 19 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 61.2 to 69 | |
| 0 to 0.4 |
| Manganese (Mn), % | 11.5 to 14.5 | |
| 0 |
| Molybdenum (Mo), % | 0 | |
| 14 to 16 |
| Nickel (Ni), % | 2.3 to 3.7 | |
| 0 |
| Niobium (Nb), % | 0 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0.2 to 0.4 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.17 |
| Phosphorus (P), % | 0 to 0.060 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.15 to 0.25 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 76 to 81.2 |
| Residuals, % | 0 | |
| 0 to 0.4 |