Materials / Compare
Magnesium AZ31B-H24 vs. Plastic PTFE
Compare Magnesium AZ31B-H24 vs. Plastic PTFE 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 | 9MPasourcetypical yield strength at 23 °C (Teflon PTFE, Table 8) |
| Ultimate tensile strength | 290MPasourcetypical, H24, 0.5-6 mm | 39.3MPasourcetypical, skived tape 0.13 mm |
| Elongation at break | 13%sourcetypical, H24, 0.5-6 mm, gauge 5.65√A | 350%sourcetypical, skived tape 0.13 mm |
| Young's modulus (stiffness) | 44.8GPasourcetypical (handbook physical constant) | not sourced |
| Density | 1,769kg/m³sourcenominal | 2,160kg/m³sourcetypical (standard specific gravity, ASTM D4894) |
| Strength to weight | 124kN·m/kg29.8x higher | 4.17kN·m/kg |
| Stiffness to weight | 25.3MN·m/kg | not sourced |
| Poisson's ratio | 0.35sourcetypical (handbook physical constant) | 0.46sourcetypical, 23 °C (Teflon PTFE resins, Chemours handbook) |
| Shear modulus | 16.6GPa | not sourced |
| Bulk modulus | 49.8GPa | not sourced |
| Speed of sound | 5,032m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 76.9W/m·Ksourcetypical (temper/temperature not stated) | 0.25W/m·Ksourcetypical, granular resin, 4.6 mm specimen |
| Thermal expansion | 26.8µm/m·Ksourcetypical (temperature range not stated) | 100µm/m·Ksourcetypical, granular resin, 23-60 °C (ASTM E228) |
| 100 mm part over a 50 °C swing | 134µm growth3.73x less | 500µm growth |
| Specific heat | 1,040J/kg·Ksourcetypical | 1,400J/kg·Ksourcetypical, granular resin, 20 °C (ASTM D4591) |
| Heats up and cools (diffusivity) | 41.8mm²/s506x faster | 0.0827mm²/s |
| Thermal shock resistance | 9,159W/m | not sourced |
| Melting point | not sourced | 327°Csourcesecond melting peak (sintered polymer), +/-10 |
| Max service temperature | 149°Csourcestated application limit | 260°Csourceservice temperature (Chemours general Teflon PTFE statement) |
| 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 | Chemours Teflon PTFE 7C X granular molding resin, typical values (tensile/elongation measured on 0.13 mm skived tape) |
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 PTFE?
Magnesium AZ31B-H24 is stronger: its yield strength is 220 MPa against 9 MPa for Plastic PTFE (24.4x).
Which is lighter, Magnesium AZ31B-H24 or Plastic PTFE?
Magnesium AZ31B-H24 is lighter: 1,769 kg/m³ against 2,160 kg/m³ for Plastic PTFE.
Which is lighter for the same job, Magnesium AZ31B-H24 or Plastic PTFE?
For the same stiffness or strength: Magnesium AZ31B-H24 is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Magnesium AZ31B-H24 | Plastic PTFE |
|---|---|---|
| Strong rod or tie | lighter | 29.8x heavier |
| Strong beam | lighter | 10.3x heavier |
| Strong panel or plate | lighter | 6.04x 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 PTFE?
Magnesium AZ31B-H24 conducts heat better: 76.9 W/m·K against 0.25 W/m·K for Plastic PTFE.
Which expands less with temperature?
Magnesium AZ31B-H24 expands less: 26.8 µm/m·K against 100 µm/m·K for Plastic PTFE.