Materials / Compare
Magnesium AZ31B-H24 vs. Plastic HDPE
Compare Magnesium AZ31B-H24 vs. Plastic HDPE 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 | 24MPasourcetypical, tensile stress at yield 23 °C, 50 mm/min ISO 527 |
| Ultimate tensile strength | 290MPasourcetypical, H24, 0.5-6 mm | not sourced |
| 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) | 0.9GPasourcetypical, tensile modulus 23 °C ISO 527 |
| Density | 1,769kg/m³sourcenominal | 950kg/m³sourcetypical, ISO 1183 |
| Strength to weight | 124kN·m/kg4.92x higher | 25.3kN·m/kg |
| Stiffness to weight | 25.3MN·m/kg26.7x higher | 0.947MN·m/kg |
| Poisson's ratio | 0.35sourcetypical (handbook physical constant) | 0.4–0.45sourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) |
| Shear modulus | 16.6GPa52.5x stiffer in shear | 0.316GPa |
| Bulk modulus | 49.8GPa | 2GPa |
| Speed of sound | 5,032m/s | 973m/s |
| Thermal | ||
| Thermal conductivity | 76.9W/m·Ksourcetypical (temper/temperature not stated) | 0.4–0.49W/m·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) |
| Thermal expansion | 26.8µm/m·Ksourcetypical (temperature range not stated) | 120µm/m·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) |
| 100 mm part over a 50 °C swing | 134µm growth4.48x less | 600µm growth |
| Specific heat | 1,040J/kg·Ksourcetypical | 2,250J/kg·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) |
| Heats up and cools (diffusivity) | 41.8mm²/s201x faster | 0.208mm²/s |
| Thermal shock resistance | 9,159W/m161x more resistant | 56.9W/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 | LyondellBasell Hostalen 23050 B high density polyethylene, typical ISO values |
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 Plastic HDPE?
Magnesium AZ31B-H24 is stronger: its yield strength is 220 MPa against 24 MPa for Plastic HDPE (9.17x).
Which is lighter, Magnesium AZ31B-H24 or Plastic HDPE?
Plastic HDPE is lighter: 950 kg/m³ against 1,769 kg/m³ for Magnesium AZ31B-H24.
Which is stiffer, Magnesium AZ31B-H24 or Plastic HDPE?
Magnesium AZ31B-H24 is stiffer: Young's modulus 44.8 GPa against 0.9 GPa for Plastic HDPE, so the same part in Magnesium AZ31B-H24 deflects less under the same load.
Which is lighter for the same job, Magnesium AZ31B-H24 or Plastic HDPE?
For the same stiffness or strength: Magnesium AZ31B-H24 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Magnesium AZ31B-H24 | Plastic HDPE |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 26.7x heavier |
| Stiff beam (bending) | lighter | 3.79x heavier |
| Stiff panel or plate | lighter | 1.98x heavier |
| Strong rod or tie | lighter | 4.92x heavier |
| Strong beam | lighter | 2.35x heavier |
| Strong panel or plate | lighter | 1.63x heavier |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Magnesium AZ31B-H24 or Plastic HDPE?
Magnesium AZ31B-H24 conducts heat better: 76.9 W/m·K against 0.445 W/m·K for Plastic HDPE.
Which expands less with temperature?
Magnesium AZ31B-H24 expands less: 26.8 µm/m·K against 120 µm/m·K for Plastic HDPE.