Grade 31 Titanium vs. R30556 Alloy
Grade 31 titanium belongs to the titanium alloys classification, while R30556 alloy 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 R30556 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 210 |
| Elongation at Break, % | 20 | |
| 45 |
| Fatigue Strength, MPa | 300 | |
| 320 |
| Poisson's Ratio | 0.32 | |
| 0.28 |
| Shear Modulus, GPa | 41 | |
| 81 |
| Shear Strength, MPa | 320 | |
| 550 |
| Tensile Strength: Ultimate (UTS), MPa | 510 | |
| 780 |
| Tensile Strength: Yield (Proof), MPa | 450 | |
| 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 420 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 320 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1660 | |
| 1420 |
| Melting Onset (Solidus), °C | 1610 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 540 | |
| 450 |
| Thermal Conductivity, W/m-K | 21 | |
| 11 |
| Thermal Expansion, µm/m-K | 8.7 | |
| 15 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.4 | |
| 1.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 6.9 | |
| 1.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 36 | |
| 8.7 |
| Embodied Energy, MJ/kg | 600 | |
| 130 |
| Embodied Water, L/kg | 230 | |
| 300 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 99 | |
| 290 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 940 | |
| 290 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 35 | |
| 23 |
| Strength to Weight: Axial, points | 32 | |
| 26 |
| Strength to Weight: Bending, points | 32 | |
| 22 |
| Thermal Diffusivity, mm2/s | 8.5 | |
| 2.9 |
| Thermal Shock Resistance, points | 39 | |
| 18 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 0.1 to 0.5 |
| Boron (B), % | 0 | |
| 0 to 0.020 |
| Carbon (C), % | 0 to 0.080 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 0 | |
| 21 to 23 |
| Cobalt (Co), % | 0.2 to 0.8 | |
| 16 to 21 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.3 | |
| 20.4 to 38.2 |
| Lanthanum (La), % | 0 | |
| 0.0050 to 0.1 |
| Manganese (Mn), % | 0 | |
| 0.5 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 2.5 to 4.0 |
| Nickel (Ni), % | 0 | |
| 19 to 22.5 |
| Niobium (Nb), % | 0 | |
| 0 to 0.3 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0.1 to 0.3 |
| Oxygen (O), % | 0 to 0.35 | |
| 0 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 | |
| 0.2 to 0.8 |
| Sulfur (S), % | 0 | |
| 0 to 0.015 |
| Tantalum (Ta), % | 0 | |
| 0.3 to 1.3 |
| Titanium (Ti), % | 97.9 to 99.76 | |
| 0 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.5 |
| Zinc (Zn), % | 0 | |
| 0.0010 to 0.1 |
| Residuals, % | 0 to 0.4 | |
| 0 |