Grade 21 Titanium vs. Type 4 Magnetic Alloy
Grade 21 titanium belongs to the titanium alloys classification, while Type 4 magnetic alloy belongs to the nickel alloys. There are 26 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 grade 21 titanium and the bottom bar is Type 4 magnetic alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 190 |
| Elongation at Break, % | 9.0 to 17 | |
| 2.0 to 40 |
| Fatigue Strength, MPa | 550 to 660 | |
| 220 to 400 |
| Poisson's Ratio | 0.32 | |
| 0.31 |
| Shear Modulus, GPa | 51 | |
| 73 |
| Shear Strength, MPa | 550 to 790 | |
| 420 to 630 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1340 | |
| 620 to 1100 |
| Tensile Strength: Yield (Proof), MPa | 870 to 1170 | |
| 270 to 1040 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 900 |
| Melting Completion (Liquidus), °C | 1740 | |
| 1420 |
| Melting Onset (Solidus), °C | 1690 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 440 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 60 |
| Density, g/cm3 | 5.4 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 10 |
| Embodied Energy, MJ/kg | 490 | |
| 140 |
| Embodied Water, L/kg | 180 | |
| 210 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 180 | |
| 22 to 200 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2760 to 5010 | |
| 190 to 2840 |
| Stiffness to Weight: Axial, points | 14 | |
| 12 |
| Stiffness to Weight: Bending, points | 32 | |
| 22 |
| Strength to Weight: Axial, points | 46 to 69 | |
| 19 to 35 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 18 to 27 |
| Thermal Shock Resistance, points | 66 to 100 | |
| 21 to 37 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 |
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.050 |
| Chromium (Cr), % | 0 | |
| 0 to 0.3 |
| Cobalt (Co), % | 0 | |
| 0 to 0.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 9.5 to 17.5 |
| Manganese (Mn), % | 0 | |
| 0 to 0.8 |
| Molybdenum (Mo), % | 14 to 16 | |
| 3.5 to 6.0 |
| Nickel (Ni), % | 0 | |
| 79 to 82 |
| Niobium (Nb), % | 2.2 to 3.2 | |
| 0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.17 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.010 |
| Silicon (Si), % | 0.15 to 0.25 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Titanium (Ti), % | 76 to 81.2 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |