AZ91C Magnesium vs. Grade 704C Zirconium
AZ91C magnesium belongs to the magnesium alloys classification, while grade 704C zirconium belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (13, 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 AZ91C magnesium and the bottom bar is grade 704C zirconium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 46 | |
| 97 |
| Elongation at Break, % | 2.3 to 7.9 | |
| 11 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 18 | |
| 36 |
| Tensile Strength: Ultimate (UTS), MPa | 170 to 270 | |
| 470 |
| Tensile Strength: Yield (Proof), MPa | 83 to 130 | |
| 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 350 | |
| 240 |
| Specific Heat Capacity, J/kg-K | 990 | |
| 270 |
| Thermal Conductivity, W/m-K | 73 | |
| 21 |
| Thermal Expansion, µm/m-K | 26 | |
| 5.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.7 | |
| 6.7 |
| Embodied Water, L/kg | 990 | |
| 460 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 3.2 to 16 | |
| 48 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 75 to 180 | |
| 490 |
| Stiffness to Weight: Axial, points | 15 | |
| 8.1 |
| Stiffness to Weight: Bending, points | 69 | |
| 23 |
| Strength to Weight: Axial, points | 27 to 43 | |
| 20 |
| Strength to Weight: Bending, points | 39 to 53 | |
| 20 |
| Thermal Diffusivity, mm2/s | 43 | |
| 12 |
| Thermal Shock Resistance, points | 9.9 to 16 | |
| 58 |
Alloy Composition
| Aluminum (Al), % | 8.1 to 9.3 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.1 |
| Copper (Cu), % | 0 to 0.1 | |
| 0 |
| Hafnium (Hf), % | 0 | |
| 0 to 4.5 |
| Hydrogen (H), % | 0 | |
| 0 to 0.0050 |
| Iron (Fe), % | 0 | |
| 0 to 0.3 |
| Magnesium (Mg), % | 88.6 to 91.4 | |
| 0 |
| Manganese (Mn), % | 0.13 to 0.35 | |
| 0 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 |
| Tin (Sn), % | 0 | |
| 1.0 to 2.0 |
| Zinc (Zn), % | 0.4 to 1.0 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 92.9 to 99 |
| Residuals, % | 0 to 0.3 | |
| 0 |