AZ81A Magnesium vs. Grade 300 Maraging Steel
AZ81A magnesium belongs to the magnesium alloys classification, while grade 300 maraging steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (11, 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 AZ81A magnesium and the bottom bar is grade 300 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 310 to 370 | |
| 730 to 1880 |
| Elastic (Young's, Tensile) Modulus, GPa | 46 | |
| 190 |
| Elongation at Break, % | 3.0 to 8.8 | |
| 6.5 to 18 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 18 | |
| 75 |
| Shear Strength, MPa | 91 to 130 | |
| 640 to 1190 |
| Tensile Strength: Ultimate (UTS), MPa | 160 to 240 | |
| 1030 to 2030 |
| Tensile Strength: Yield (Proof), MPa | 84 | |
| 760 to 1990 |
Thermal Properties
| Latent Heat of Fusion, J/g | 350 | |
| 270 |
| Melting Completion (Liquidus), °C | 600 | |
| 1480 |
| Melting Onset (Solidus), °C | 500 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 990 | |
| 450 |
| Thermal Expansion, µm/m-K | 27 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 34 |
| Density, g/cm3 | 1.7 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 23 | |
| 5.1 |
| Embodied Energy, MJ/kg | 160 | |
| 68 |
| Embodied Water, L/kg | 990 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.0 to 17 | |
| 130 to 170 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 70 | |
| 23 |
| Strength to Weight: Axial, points | 26 to 39 | |
| 35 to 68 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 28 to 43 |
| Thermal Shock Resistance, points | 9.1 to 14 | |
| 31 to 62 |
Alloy Composition
| Aluminum (Al), % | 7.0 to 8.1 | |
| 0.050 to 0.15 |
| Boron (B), % | 0 | |
| 0 to 0.0030 |
| Calcium (Ca), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0 | |
| 0 to 0.030 |
| Cobalt (Co), % | 0 | |
| 8.5 to 9.5 |
| Copper (Cu), % | 0 to 0.1 | |
| 0 |
| Iron (Fe), % | 0 | |
| 65 to 68.4 |
| Magnesium (Mg), % | 89.8 to 92.5 | |
| 0 |
| Manganese (Mn), % | 0.13 to 0.35 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 0 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 0 to 0.010 | |
| 18 to 19 |
| Phosphorus (P), % | 0 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0.5 to 0.8 |
| Zinc (Zn), % | 0.4 to 1.0 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |
| Residuals, % | 0 to 0.3 | |
| 0 |