Grade 18 Titanium vs. ZK61A Magnesium
Grade 18 titanium belongs to the titanium alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 29 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 18 titanium and the bottom bar is ZK61A magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 46 |
| Elongation at Break, % | 11 to 17 | |
| 5.8 to 7.1 |
| Fatigue Strength, MPa | 330 to 480 | |
| 120 to 140 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 40 | |
| 18 |
| Shear Strength, MPa | 420 to 590 | |
| 170 to 180 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 290 to 310 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 180 to 200 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 330 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 120 |
| Melting Completion (Liquidus), °C | 1640 | |
| 640 |
| Melting Onset (Solidus), °C | 1590 | |
| 530 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 960 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 120 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 27 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 29 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 130 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 1.9 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 23 |
| Embodied Energy, MJ/kg | 670 | |
| 160 |
| Embodied Water, L/kg | 270 | |
| 940 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
| 15 to 19 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1380 to 3110 | |
| 370 to 420 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 62 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 42 to 45 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 50 to 53 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 65 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 17 to 18 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.5 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.1 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 0 |
| Magnesium (Mg), % | 0 | |
| 92.1 to 93.9 |
| Nickel (Ni), % | 0 | |
| 0 to 0.010 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.15 | |
| 0 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 0 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 5.5 to 6.5 |
| Zirconium (Zr), % | 0 | |
| 0.6 to 1.0 |
| Residuals, % | 0 | |
| 0 to 0.3 |