Materials / Compare
Plastic HDPE vs. Plastic PPS GF40
Compare Plastic HDPE vs. Plastic PPS GF40 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 | 24MPasourcetypical, tensile stress at yield 23 °C, 50 mm/min ISO 527 | not given (tensile used) |
| Ultimate tensile strength | not sourced | 195MPasourcetensile strength, 5 mm/min |
| Flexural strength | not sourced | 285MPasourceflexural strength at break |
| Elongation at break | not sourced | 1.9%sourcestrain at break, 5 mm/min |
| Young's modulus (stiffness) | 0.9GPasourcetypical, tensile modulus 23 °C ISO 527 | 14.7GPasourcetypical, 1 mm/min |
| Density | 950kg/m³sourcetypical, ISO 1183 | 1,650kg/m³sourcetypical |
| Strength to weight | 25.3kN·m/kg | 118kN·m/kg4.68x higher |
| Stiffness to weight | 0.947MN·m/kg | 8.91MN·m/kg9.4x higher |
| Poisson's ratio | 0.4–0.45sourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) | 0.35sourceglass-reinforced Fortron PPS (class value, not grade-specific) |
| Shear modulus | 0.316GPa | 5.44GPa17.2x stiffer in shear |
| Bulk modulus | 2GPa | 16.3GPa |
| Speed of sound | 973m/s | 2,985m/s |
| Thermal | ||
| Thermal conductivity | 0.4–0.49W/m·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) | 0.2W/m·Ksource40% glass-reinforced Fortron, 25 °C (not grade-specific) |
| Thermal expansion | 120µm/m·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) | 12µm/m·Ksourceparallel (flow), mean -50 to 90 °C |
| 100 mm part over a 50 °C swing | 600µm growth | 60µm growth10x less |
| Specific heat | 2,250J/kg·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) | not sourced |
| Heats up and cools (diffusivity) | 0.208mm²/s | not sourced |
| Thermal shock resistance | 56.9W/m | 144W/m2.53x more resistant |
| Melting point | not sourced | 280°CsourceDSC, 10 °C/min |
| Glass transition | not sourced | 90°CsourceDSC, 10 °C/min |
| Max service temperature | not sourced | 270°CsourceHDT 1.8 MPa |
| Values for | LyondellBasell Hostalen 23050 B high density polyethylene, typical ISO values | Celanese Fortron 1140L4 (PPS, 40% glass fibre), injection moulding; FORTRON PPS Short-Term Properties Guide (PPS-012, 2016); thermal conductivity and Poisson for 40% glass-reinforced Fortron from the Fortron PPS Design Manual (PPS-050, 2013). |
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 Plastic HDPE stronger than Plastic PPS GF40?
Plastic PPS GF40 is stronger: its tensile strength is 195 MPa against yield strength 24 MPa for Plastic HDPE (8.13x).
Which is lighter, Plastic HDPE or Plastic PPS GF40?
Plastic HDPE is lighter: 950 kg/m³ against 1,650 kg/m³ for Plastic PPS GF40.
Which is stiffer, Plastic HDPE or Plastic PPS GF40?
Plastic PPS GF40 is stiffer: Young's modulus 14.7 GPa against 0.9 GPa for Plastic HDPE, so the same part in Plastic PPS GF40 deflects less under the same load.
Which is lighter for the same job, Plastic HDPE or Plastic PPS GF40?
For the same stiffness or strength: Plastic PPS GF40 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 | Plastic HDPE | Plastic PPS GF40 |
|---|---|---|
| Stiff rod or tie (tension) | 9.4x heavier | lighter |
| Stiff beam (bending) | 2.33x heavier | lighter |
| Stiff panel or plate | 46% heavier | lighter |
| Strong rod or tie | 4.68x heavier | lighter |
| Strong beam | 2.33x heavier | lighter |
| Strong panel or plate | 1.64x heavier | lighter |
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, Plastic HDPE or Plastic PPS GF40?
Plastic HDPE conducts heat better: 0.445 W/m·K against 0.2 W/m·K for Plastic PPS GF40.
Which expands less with temperature?
Plastic PPS GF40 expands less: 12 µm/m·K against 120 µm/m·K for Plastic HDPE.