Materials / Compare

Plastic HDPE vs. Plastic LCP GF30

Compare Plastic HDPE vs. Plastic LCP GF30 strength, stiffness, weight and thermal properties.

Change either side
Plastic HDPEBulk polymer (molded or machined)
Plastic LCP GF30Bulk polymer (molded or machined)
Try it on a partA bracket to run stress or thermal on, free in your browserOpen in LessCADOpen in LessCAD
Mechanical
Yield strength24MPasourcetypical, tensile stress at yield 23 °C, 50 mm/min ISO 527not given (tensile used)
Ultimate tensile strengthnot sourced115MPasourcetensile strength (ISO 527)
Flexural strengthnot sourced184MPasourcetypical (ISO 178)
Elongation at breaknot sourced1.5%sourcetensile elongation (ISO 527)
Young's modulus (stiffness)0.9GPasourcetypical, tensile modulus 23 °C ISO 52711.5GPasourcetensile modulus (ISO 527)
Density950kg/m³sourcetypical, ISO 11831,610kg/m³sourcetypical
Strength to weight25.3kN·m/kg71.4kN·m/kg2.83x higher
Stiffness to weight0.947MN·m/kg7.14MN·m/kg7.54x higher
Poisson's ratio0.4–0.45sourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE)not sourced
Shear modulus0.316GPanot sourced
Bulk modulus2GPanot sourced
Speed of sound973m/s2,673m/s
Thermal
Thermal conductivity0.4–0.49W/m·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE)0.5W/m·Ksourcehot disk (ISO 22007-2), temperature not stated
Thermal expansion120µm/m·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE)20µm/m·Ksourceflow direction (MD), mean 50-150 °C
100 mm part over a 50 °C swing600µm growth100µm growth6x less
Specific heat2,250J/kg·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE)839J/kg·KsourceASTM E1269, temperature not stated
Heats up and cools (diffusivity)0.208mm²/s0.37mm²/s1.78x faster
Thermal shock resistance56.9W/mnot sourced
Max service temperaturenot sourced288°CsourceHDT 1.8 MPa (ISO 75)
Values forLyondellBasell Hostalen 23050 B high density polyethylene, typical ISO valuesSumitomo Chemical SUMIKASUPER LCP E6006L (30% glass fibre; high strength, low shrinkage); SUMIKASUPER LCP Technical Note, Version 04 / Nov. 2023, typical 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 Plastic HDPE stronger than Plastic LCP GF30?

Plastic LCP GF30 is stronger: its tensile strength is 115 MPa against yield strength 24 MPa for Plastic HDPE (4.79x).

Which is lighter, Plastic HDPE or Plastic LCP GF30?

Plastic HDPE is lighter: 950 kg/m³ against 1,610 kg/m³ for Plastic LCP GF30.

Which is stiffer, Plastic HDPE or Plastic LCP GF30?

Plastic LCP GF30 is stiffer: Young's modulus 11.5 GPa against 0.9 GPa for Plastic HDPE, so the same part in Plastic LCP GF30 deflects less under the same load.

Which is lighter for the same job, Plastic HDPE or Plastic LCP GF30?

For the same stiffness or strength: Plastic LCP GF30 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 bePlastic HDPEPlastic LCP GF30
Stiff rod or tie (tension)7.54x heavierlighter
Stiff beam (bending)2.11x heavierlighter
Stiff panel or plate38% heavierlighter
Strong rod or tie2.83x heavierlighter
Strong beam1.68x heavierlighter
Strong panel or plate29% heavierlighter

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 LCP GF30?

Plastic LCP GF30 conducts heat better: 0.5 W/m·K against 0.445 W/m·K for Plastic HDPE.

Which expands less with temperature?

Plastic LCP GF30 expands less: 20 µm/m·K against 120 µm/m·K for Plastic HDPE.

Among 72 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelPCB Laminate FR-4SiliconCeramic Alumina 96%Ceramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic HDPEPlastic LCP GF30
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLA Resin Elastic 50ASLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelBrickPCB Laminate FR-4SiliconCeramic Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic HDPEPlastic LCP GF30
Strength against density

Related comparisons