Grade 21 Titanium vs. ISO-WD32260 Magnesium
Grade 21 titanium belongs to the titanium alloys classification, while ISO-WD32260 magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is grade 21 titanium and the bottom bar is ISO-WD32260 magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 46 |
| Elongation at Break, % | 9.0 to 17 | |
| 4.5 to 6.0 |
| Fatigue Strength, MPa | 550 to 660 | |
| 150 to 190 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 51 | |
| 18 |
| Shear Strength, MPa | 550 to 790 | |
| 190 to 200 |
| Tensile Strength: Ultimate (UTS), MPa | 890 to 1340 | |
| 330 to 340 |
| Tensile Strength: Yield (Proof), MPa | 870 to 1170 | |
| 230 to 250 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 330 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 120 |
| Melting Completion (Liquidus), °C | 1740 | |
| 600 |
| Melting Onset (Solidus), °C | 1690 | |
| 520 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 970 |
| Thermal Conductivity, W/m-K | 7.5 | |
| 110 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 27 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 13 |
| Density, g/cm3 | 5.4 | |
| 1.9 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 23 |
| Embodied Energy, MJ/kg | 490 | |
| 160 |
| Embodied Water, L/kg | 180 | |
| 940 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 180 | |
| 14 to 19 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2760 to 5010 | |
| 560 to 700 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 32 | |
| 63 |
| Strength to Weight: Axial, points | 46 to 69 | |
| 48 to 51 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 56 to 58 |
| Thermal Diffusivity, mm2/s | 2.8 | |
| 63 |
| Thermal Shock Resistance, points | 66 to 100 | |
| 19 to 20 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 |
| Carbon (C), % | 0 to 0.050 | |
| 0 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 |
| Magnesium (Mg), % | 0 | |
| 92.7 to 94.8 |
| Molybdenum (Mo), % | 14 to 16 | |
| 0 |
| Niobium (Nb), % | 2.2 to 3.2 | |
| 0 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.17 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.25 | |
| 0 |
| Titanium (Ti), % | 76 to 81.2 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 4.8 to 6.2 |
| Zirconium (Zr), % | 0 | |
| 0.45 to 0.8 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.3 |