AZ91B Magnesium vs. Grade 200 Maraging Steel
AZ91B magnesium belongs to the magnesium alloys classification, while grade 200 maraging steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, 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 AZ91B magnesium and the bottom bar is grade 200 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 160 | |
| 730 to 1260 |
| Elastic (Young's, Tensile) Modulus, GPa | 46 | |
| 190 |
| Elongation at Break, % | 5.0 | |
| 9.1 to 18 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 18 | |
| 74 |
| Shear Strength, MPa | 140 | |
| 600 to 890 |
| Tensile Strength: Ultimate (UTS), MPa | 240 | |
| 970 to 1500 |
| Tensile Strength: Yield (Proof), MPa | 160 | |
| 690 to 1490 |
Thermal Properties
| Latent Heat of Fusion, J/g | 360 | |
| 260 |
| Melting Completion (Liquidus), °C | 600 | |
| 1460 |
| Melting Onset (Solidus), °C | 470 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 990 | |
| 460 |
| Thermal Expansion, µm/m-K | 26 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 31 |
| Density, g/cm3 | 1.7 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 22 | |
| 4.5 |
| Embodied Energy, MJ/kg | 160 | |
| 59 |
| Embodied Water, L/kg | 990 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 11 | |
| 140 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 280 | |
| 1240 to 5740 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 69 | |
| 23 |
| Strength to Weight: Axial, points | 38 | |
| 33 to 51 |
| Strength to Weight: Bending, points | 49 | |
| 27 to 35 |
| Thermal Shock Resistance, points | 14 | |
| 29 to 45 |
Alloy Composition
| Aluminum (Al), % | 8.3 to 9.7 | |
| 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 | |
| 8.0 to 9.0 |
| Copper (Cu), % | 0 to 0.35 | |
| 0 |
| Iron (Fe), % | 0 | |
| 67.8 to 71.8 |
| Magnesium (Mg), % | 87.9 to 91.2 | |
| 0 |
| Manganese (Mn), % | 0.13 to 0.5 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 0 | |
| 3.0 to 3.5 |
| Nickel (Ni), % | 0 to 0.030 | |
| 17 to 19 |
| Phosphorus (P), % | 0 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0.15 to 0.25 |
| Zinc (Zn), % | 0.35 to 1.0 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |