EN 1.4401 Stainless Steel vs. Grade 18 Titanium
EN 1.4401 stainless steel belongs to the iron alloys classification, while grade 18 titanium belongs to the titanium alloys. There are 29 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 1.4401 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 40 | |
| 11 to 17 |
| Fatigue Strength, MPa | 200 to 320 | |
| 330 to 480 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Shear Modulus, GPa | 78 | |
| 40 |
| Shear Strength, MPa | 410 to 550 | |
| 420 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 600 to 900 | |
| 690 to 980 |
| Tensile Strength: Yield (Proof), MPa | 230 to 570 | |
| 540 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 950 | |
| 330 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1640 |
| Melting Onset (Solidus), °C | 1400 | |
| 1590 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 550 |
| Thermal Conductivity, W/m-K | 15 | |
| 8.3 |
| Thermal Expansion, µm/m-K | 16 | |
| 9.9 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.3 | |
| 1.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.6 | |
| 2.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.9 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 3.8 | |
| 41 |
| Embodied Energy, MJ/kg | 52 | |
| 670 |
| Embodied Water, L/kg | 150 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 190 | |
| 87 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 800 | |
| 1380 to 3110 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 35 |
| Strength to Weight: Axial, points | 21 to 32 | |
| 43 to 61 |
| Strength to Weight: Bending, points | 20 to 26 | |
| 39 to 49 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 3.4 |
| Thermal Shock Resistance, points | 13 to 20 | |
| 47 to 67 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 to 0.070 | |
| 0 to 0.080 |
| Chromium (Cr), % | 16.5 to 18.5 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 62.8 to 71.5 | |
| 0 to 0.25 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 2.0 to 2.5 | |
| 0 |
| Nickel (Ni), % | 10 to 13 | |
| 0 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.15 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 92.5 to 95.5 |
| Vanadium (V), % | 0 | |
| 2.0 to 3.0 |
| Residuals, % | 0 | |
| 0 to 0.4 |