EN 1.4640 Stainless Steel vs. Grade 21 Titanium
EN 1.4640 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 (6, in this case) are not shown.
For each property being compared, the top bar is EN 1.4640 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, % | 51 | |
| 9.0 to 17 |
| Fatigue Strength, MPa | 230 to 250 | |
| 550 to 660 |
| Poisson's Ratio | 0.28 | |
| 0.32 |
| Shear Modulus, GPa | 77 | |
| 51 |
| Shear Strength, MPa | 440 to 460 | |
| 550 to 790 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 650 | |
| 890 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 240 to 260 | |
| 870 to 1170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 310 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1740 |
| Melting Onset (Solidus), °C | 1380 | |
| 1690 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 500 |
| Thermal Conductivity, W/m-K | 15 | |
| 7.5 |
| Thermal Expansion, µm/m-K | 16 | |
| 7.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 60 |
| Density, g/cm3 | 7.8 | |
| 5.4 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 32 |
| Embodied Energy, MJ/kg | 40 | |
| 490 |
| Embodied Water, L/kg | 150 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 to 260 | |
| 110 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 170 | |
| 2760 to 5010 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 32 |
| Strength to Weight: Axial, points | 22 to 23 | |
| 46 to 69 |
| Strength to Weight: Bending, points | 21 | |
| 38 to 50 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 2.8 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 66 to 100 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0.030 to 0.080 | |
| 0 to 0.050 |
| Chromium (Cr), % | 18 to 19 | |
| 0 |
| Copper (Cu), % | 1.3 to 2.0 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 67.4 to 73.6 | |
| 0 to 0.4 |
| Manganese (Mn), % | 1.5 to 4.0 | |
| 0 |
| Molybdenum (Mo), % | 0 | |
| 14 to 16 |
| Nickel (Ni), % | 5.5 to 6.9 | |
| 0 |
| Niobium (Nb), % | 0 | |
| 2.2 to 3.2 |
| Nitrogen (N), % | 0.030 to 0.11 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.17 |
| Phosphorus (P), % | 0 to 0.045 | |
| 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 |
| Residuals, % | 0 | |
| 0 to 0.4 |