Grade 31 Titanium vs. EN 1.4655 Stainless Steel
Grade 31 titanium belongs to the titanium alloys classification, while EN 1.4655 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is grade 31 titanium and the bottom bar is EN 1.4655 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 200 |
| Elongation at Break, % | 20 | |
| 23 to 25 |
| Fatigue Strength, MPa | 300 | |
| 320 |
| Poisson's Ratio | 0.32 | |
| 0.27 |
| Shear Modulus, GPa | 41 | |
| 78 |
| Shear Strength, MPa | 320 | |
| 460 |
| Tensile Strength: Ultimate (UTS), MPa | 510 | |
| 720 to 730 |
| Tensile Strength: Yield (Proof), MPa | 450 | |
| 450 to 480 |
Thermal Properties
| Latent Heat of Fusion, J/g | 420 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 320 | |
| 1050 |
| Melting Completion (Liquidus), °C | 1660 | |
| 1420 |
| Melting Onset (Solidus), °C | 1610 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 540 | |
| 480 |
| Thermal Conductivity, W/m-K | 21 | |
| 15 |
| Thermal Expansion, µm/m-K | 8.7 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.4 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 6.9 | |
| 2.5 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 36 | |
| 2.9 |
| Embodied Energy, MJ/kg | 600 | |
| 41 |
| Embodied Water, L/kg | 230 | |
| 160 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 99 | |
| 150 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 940 | |
| 510 to 580 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 35 | |
| 25 |
| Strength to Weight: Axial, points | 32 | |
| 26 |
| Strength to Weight: Bending, points | 32 | |
| 23 |
| Thermal Diffusivity, mm2/s | 8.5 | |
| 4.0 |
| Thermal Shock Resistance, points | 39 | |
| 20 |
Alloy Composition
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.030 |
| Chromium (Cr), % | 0 | |
| 22 to 24 |
| Cobalt (Co), % | 0.2 to 0.8 | |
| 0 |
| Copper (Cu), % | 0 | |
| 1.0 to 3.0 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.3 | |
| 63.6 to 73.4 |
| Manganese (Mn), % | 0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 0.1 to 0.6 |
| Nickel (Ni), % | 0 | |
| 3.5 to 5.5 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0.050 to 0.2 |
| Oxygen (O), % | 0 to 0.35 | |
| 0 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.015 |
| Titanium (Ti), % | 97.9 to 99.76 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |