Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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VICTREX PEEK 450G Technical Data SheetVictrexPlastic PEEK · Yield strength: typical, tensile yieldPlastic PEEK · Compressive strength: typical, 23 CPlastic PEEK · Flexural strength: typical, flexural stress at yield, 23 CPlastic PEEK · Elongation at break: typical, at breakPlastic PEEK · Young's modulus (stiffness): typical (nominal)Plastic PEEK · Density: typical (crystalline)Plastic PEEK · Thermal conductivity: typical, average, 23 CPlastic PEEK · Thermal expansion: average of flow/cross-flow, below Tg (<143 C)Plastic PEEK · Melting point: typical, DSCPlastic PEEK · Glass transition: onset (midpoint 150 C)Plastic PEEK · Max service temperature: UL 746B RTI, mechanical strength (continuous use index)
3
Engineering Polymers Part and Mold Design: Thermoplastics, A Design GuideCovestroarchived copyPlastic ABS (bulk/injection) · Poisson's ratio: typical, ABS family (Covestro Part and Mold Design guide, Table 3-1)
4
VICTREX PEEK for Use in Fluid Management (2020)VictrexPlastic PEEK · Poisson's ratio: typical
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VICTREX PEEK 450G Technical Data Sheet (2012)Victrexarchived copyPlastic PEEK · Specific heat: typical, 23 °C, DSC (Victrex PEEK 450G TDS, revision Jul 2012)
Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Mechanical
Is Plastic ABS (bulk/injection) stronger than Plastic PEEK?
Plastic PEEK is stronger: its yield strength is 98 MPa against 45 MPa for Plastic ABS (bulk/injection) (2.18x).
Which is lighter, Plastic ABS (bulk/injection) or Plastic PEEK?
Plastic ABS (bulk/injection) is lighter: 1,040 kg/m³ against 1,300 kg/m³ for Plastic PEEK.
Which is stiffer, Plastic ABS (bulk/injection) or Plastic PEEK?
Plastic PEEK is stiffer: Young's modulus 4 GPa against 2.3 GPa for Plastic ABS (bulk/injection), so the same part in Plastic PEEK deflects less under the same load.
Which is lighter for the same job, Plastic ABS (bulk/injection) or Plastic PEEK?
For the same stiffness or strength: Plastic ABS (bulk/injection) is lighter for a stiff panel or plate; Plastic PEEK is lighter for a stiff rod or tie (tension), stiff beam (bending), strong rod or tie, strong beam, strong panel or plate.
Part that must be
Plastic ABS (bulk/injection)
Plastic PEEK
Stiff rod or tie (tension)
39% heavier
lighter
Stiff beam (bending)
6% heavier
lighter
Stiff panel or plate
lighter
4% heavier
Strong rod or tie
1.74x heavier
lighter
Strong beam
34% heavier
lighter
Strong panel or plate
18% 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 is more ductile, Plastic ABS (bulk/injection) or Plastic PEEK?
Plastic PEEK stretches further before it breaks: 25% elongation at break against 10% for Plastic ABS (bulk/injection).
Thermal
Which conducts heat better, Plastic ABS (bulk/injection) or Plastic PEEK?
Plastic PEEK conducts heat better: 0.29 W/m·K against 0.17 W/m·K for Plastic ABS (bulk/injection).
Which expands less with temperature?
Plastic PEEK expands less: 55 µm/m·K against 95 µm/m·K for Plastic ABS (bulk/injection).