EN 1.4378 Stainless Steel vs. Grade 18 Titanium
EN 1.4378 stainless steel belongs to the iron alloys classification, while grade 18 titanium belongs to the titanium 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 EN 1.4378 stainless steel and the bottom bar is grade 18 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 110 |
| Elongation at Break, % | 14 to 34 | |
| 11 to 17 |
| Fatigue Strength, MPa | 340 to 550 | |
| 330 to 480 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Shear Modulus, GPa | 77 | |
| 40 |
| Shear Strength, MPa | 510 to 680 | |
| 420 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 760 to 1130 | |
| 690 to 980 |
| Tensile Strength: Yield (Proof), MPa | 430 to 970 | |
| 540 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 910 | |
| 330 |
| Melting Completion (Liquidus), °C | 1390 | |
| 1640 |
| Melting Onset (Solidus), °C | 1350 | |
| 1590 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 550 |
| Thermal Expansion, µm/m-K | 17 | |
| 9.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.6 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 41 |
| Embodied Energy, MJ/kg | 39 | |
| 670 |
| Embodied Water, L/kg | 150 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 to 220 | |
| 87 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 470 to 2370 | |
| 1380 to 3110 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 35 |
| Strength to Weight: Axial, points | 28 to 41 | |
| 43 to 61 |
| Strength to Weight: Bending, points | 24 to 31 | |
| 39 to 49 |
| Thermal Shock Resistance, points | 16 to 23 | |
| 47 to 67 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.080 |
| Chromium (Cr), % | 17 to 19 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 61.2 to 69 | |
| 0 to 0.25 |
| Manganese (Mn), % | 11.5 to 14.5 | |
| 0 |
| Nickel (Ni), % | 2.3 to 3.7 | |
| 0 |
| Nitrogen (N), % | 0.2 to 0.4 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.15 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Phosphorus (P), % | 0 to 0.060 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 92.5 to 95.5 |
| Vanadium (V), % | 0 | |
| 2.0 to 3.0 |
| Residuals, % | 0 | |
| 0 to 0.4 |