Materials / Compare
Magnesium AZ31B-H24 vs. Wood
Compare Magnesium AZ31B-H24 vs. Wood strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | 220MPasourcetypical, H24, 0.5-6 mm, 0.2 % proof stress | not given (tensile used) |
| Ultimate tensile strength | 290MPasourcetypical, H24, 0.5-6 mm | 99MPasourcemodulus of rupture (no direct tensile value) |
| Compressive strength | not sourced | 46.6MPasourcecompression parallel to grain (maximum crushing strength), 12% MC |
| Flexural strength | not sourced | 99MPasourcemodulus of rupture (static bending), 12% MC |
| Elongation at break | 13%sourcetypical, H24, 0.5-6 mm, gauge 5.65√A | not sourced |
| Young's modulus (stiffness) | 44.8GPasourcetypical (handbook physical constant) | 12.5GPasourcebending MOE, parallel to grain |
| Density | 1,769kg/m³sourcenominal | not sourced |
| Strength to weight | 124kN·m/kg | not sourced |
| Stiffness to weight | 25.3MN·m/kg | not sourced |
| Poisson's ratio | 0.35sourcetypical (handbook physical constant) | 0.35sourcemu_LR (red oak group, ~12% MC) |
| Shear modulus | 16.6GPa3.58x stiffer in shear | 4.63GPa |
| Bulk modulus | 49.8GPa | 13.9GPa |
| Speed of sound | 5,032m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 76.9W/m·Ksourcetypical (temper/temperature not stated) | 0.18W/m·Ksourceacross grain, 12% MC (Table 4-7, approximate) |
| Thermal expansion | 26.8µm/m·Ksourcetypical (temperature range not stated) | 3.1–4.5µm/m·Ksourceparallel to grain, ovendry wood, range across species |
| 100 mm part over a 50 °C swing | 134µm growth | 19µm growth7.05x less |
| Specific heat | 1,040J/kg·Ksourcetypical | 1,700J/kg·Ksourcesolid wood (all species), 12% MC, 27 C |
| Heats up and cools (diffusivity) | 41.8mm²/s | not sourced |
| Thermal shock resistance | 9,159W/m37.6x more resistant | 244W/m |
| Max service temperature | 149°Csourcestated application limit | not sourced |
| Values for | AZ31B-H24 sheet 0.016-0.062 in., MIL-HDBK-5J Table 4.2.1.0(b) (AMS 4377); strengths are S-basis MINIMUMS | Northern red oak (Quercus rubra), clear straight-grained specimens at 12% MC, parallel to grain unless stated; USDA FPL Wood Handbook FPL-GTR-282 (2021) Ch. 4 and Ch. 5 |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Is Magnesium AZ31B-H24 stronger than Wood?
Magnesium AZ31B-H24 is stronger: its yield strength is 220 MPa against tensile strength 99 MPa for Wood (2.22x).
Which is stiffer, Magnesium AZ31B-H24 or Wood?
Magnesium AZ31B-H24 is stiffer: Young's modulus 44.8 GPa against 12.5 GPa for Wood, so the same part in Magnesium AZ31B-H24 deflects less under the same load.
Which conducts heat better, Magnesium AZ31B-H24 or Wood?
Magnesium AZ31B-H24 conducts heat better: 76.9 W/m·K against 0.18 W/m·K for Wood.
Which expands less with temperature?
Wood expands less: 3.8 µm/m·K against 26.8 µm/m·K for Magnesium AZ31B-H24.