Materials / Compare
Magnesium AZ31B-H24 vs. Plastic UHMWPE
Compare Magnesium AZ31B-H24 vs. Plastic UHMWPE 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 | 20MPasourcetypical, tensile stress at yield ISO 527, 50 mm/min |
| Ultimate tensile strength | 290MPasourcetypical, H24, 0.5-6 mm | 43MPasourcetypical, tensile stress at break ISO 527, 50 mm/min |
| Elongation at break | 13%sourcetypical, H24, 0.5-6 mm, gauge 5.65√A | 465%sourcetypical, nominal elongation at break ISO 527 |
| Young's modulus (stiffness) | 44.8GPasourcetypical (handbook physical constant) | 0.66GPasourcetypical, tensile modulus ISO 527, 1 mm/min |
| Density | 1,769kg/m³sourcenominal | 930kg/m³sourcetypical |
| Strength to weight | 124kN·m/kg5.78x higher | 21.5kN·m/kg |
| Stiffness to weight | 25.3MN·m/kg35.7x higher | 0.71MN·m/kg |
| Poisson's ratio | 0.35sourcetypical (handbook physical constant) | not sourced |
| Shear modulus | 16.6GPa | not sourced |
| Bulk modulus | 49.8GPa | not sourced |
| Speed of sound | 5,032m/s | 842m/s |
| Thermal | ||
| Thermal conductivity | 76.9W/m·Ksourcetypical (temper/temperature not stated) | 0.4W/m·Ksourcetypical, unfilled (narrative value, generic Celanese UHMWPE) |
| Thermal expansion | 26.8µm/m·Ksourcetypical (temperature range not stated) | 200µm/m·Ksourcetypical, 20 to 100 °C (generic Celanese UHMWPE) |
| 100 mm part over a 50 °C swing | 134µm growth7.46x less | 1,000µm growth |
| Specific heat | 1,040J/kg·Ksourcetypical | not sourced |
| Heats up and cools (diffusivity) | 41.8mm²/s | not sourced |
| Thermal shock resistance | 9,159W/m | not sourced |
| Melting point | not sourced | 130–138°CsourceDSC 10 K/min |
| Max service temperature | 149°Csourcestated application limit | 80°Csourcerecommended max constant operating temperature |
| 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 | Celanese GUR 4120 (avg. molecular weight 4.7x10^6 g/mol), typical values on compression-molded specimens; CTE and thermal conductivity from Celanese's generic UHMWPE guide (grade not named) |
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 UHMWPE?
Magnesium AZ31B-H24 is stronger: its yield strength is 220 MPa against 20 MPa for Plastic UHMWPE (11x).
Which is lighter, Magnesium AZ31B-H24 or Plastic UHMWPE?
Plastic UHMWPE is lighter: 930 kg/m³ against 1,769 kg/m³ for Magnesium AZ31B-H24.
Which is stiffer, Magnesium AZ31B-H24 or Plastic UHMWPE?
Magnesium AZ31B-H24 is stiffer: Young's modulus 44.8 GPa against 0.66 GPa for Plastic UHMWPE, 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 UHMWPE?
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 UHMWPE |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 35.7x heavier |
| Stiff beam (bending) | lighter | 4.33x heavier |
| Stiff panel or plate | lighter | 2.14x heavier |
| Strong rod or tie | lighter | 5.78x heavier |
| Strong beam | lighter | 2.6x heavier |
| Strong panel or plate | lighter | 1.74x 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 UHMWPE?
Magnesium AZ31B-H24 conducts heat better: 76.9 W/m·K against 0.4 W/m·K for Plastic UHMWPE.
Which expands less with temperature?
Magnesium AZ31B-H24 expands less: 26.8 µm/m·K against 200 µm/m·K for Plastic UHMWPE.