EN 1.4938 Stainless Steel vs. Grade 21 Titanium
EN 1.4938 stainless steel belongs to the iron alloys classification, while grade 21 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is EN 1.4938 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, % | 16 to 17 | |
| 9.0 to 17 |
| Fatigue Strength, MPa | 390 to 520 | |
| 550 to 660 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Shear Modulus, GPa | 76 | |
| 51 |
| Shear Strength, MPa | 540 to 630 | |
| 550 to 790 |
| Tensile Strength: Ultimate (UTS), MPa | 870 to 1030 | |
| 890 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 640 to 870 | |
| 870 to 1170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 750 | |
| 310 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1740 |
| Melting Onset (Solidus), °C | 1420 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 500 |
| Thermal Conductivity, W/m-K | 30 | |
| 7.5 |
| Thermal Expansion, µm/m-K | 11 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 60 |
| Density, g/cm3 | 7.8 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 3.3 | |
| 32 |
| Embodied Energy, MJ/kg | 47 | |
| 490 |
| Embodied Water, L/kg | 110 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 160 | |
| 110 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1050 to 1920 | |
| 2760 to 5010 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 32 |
| Strength to Weight: Axial, points | 31 to 37 | |
| 46 to 69 |
| Strength to Weight: Bending, points | 26 to 29 | |
| 38 to 50 |
| Thermal Diffusivity, mm2/s | 8.1 | |
| 2.8 |
| Thermal Shock Resistance, points | 30 to 35 | |
| 66 to 100 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0.080 to 0.15 | |
| 0 to 0.050 |
| Chromium (Cr), % | 11 to 12.5 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 80.5 to 84.8 | |
| 0 to 0.4 |
| Manganese (Mn), % | 0.4 to 0.9 | |
| 0 |
| Molybdenum (Mo), % | 1.5 to 2.0 | |
| 14 to 16 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 |
| Niobium (Nb), % | 0 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0.020 to 0.040 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.17 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 |
| Silicon (Si), % | 0 to 0.5 | |
| 0.15 to 0.25 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 76 to 81.2 |
| Vanadium (V), % | 0.25 to 0.4 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.4 |