EN 1.4971 Stainless Steel vs. Grade 31 Titanium
EN 1.4971 stainless steel belongs to the iron alloys classification, while grade 31 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is grade 31 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 110 |
| Elongation at Break, % | 34 | |
| 20 |
| Fatigue Strength, MPa | 270 | |
| 300 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 81 | |
| 41 |
| Shear Strength, MPa | 530 | |
| 320 |
| Tensile Strength: Ultimate (UTS), MPa | 800 | |
| 510 |
| Tensile Strength: Yield (Proof), MPa | 340 | |
| 450 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 420 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 320 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1660 |
| Melting Onset (Solidus), °C | 1410 | |
| 1610 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 540 |
| Thermal Conductivity, W/m-K | 13 | |
| 21 |
| Thermal Expansion, µm/m-K | 15 | |
| 8.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 7.6 | |
| 36 |
| Embodied Energy, MJ/kg | 110 | |
| 600 |
| Embodied Water, L/kg | 300 | |
| 230 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 220 | |
| 99 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 280 | |
| 940 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 35 |
| Strength to Weight: Axial, points | 26 | |
| 32 |
| Strength to Weight: Bending, points | 23 | |
| 32 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 8.5 |
| Thermal Shock Resistance, points | 19 | |
| 39 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 to 0.080 |
| Chromium (Cr), % | 20 to 22.5 | |
| 0 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0.2 to 0.8 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 24.3 to 37.1 | |
| 0 to 0.3 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 0 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0.1 to 0.2 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 | |
| 0 to 0.35 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 97.9 to 99.76 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.4 |