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Plastic LCP GF30 vs. Steel AISI 4340 Compare Plastic LCP GF30 vs. Steel AISI 4340 strength, stiffness, weight and thermal properties.
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Plastic PLA Plastic PETG Plastic ABS Plastic TPU Plastic Nylon Plastic ABS (bulk/injection) Plastic Polycarbonate Plastic POM/Acetal Plastic Nylon PA6 Plastic Nylon PA66 Plastic PEEK Plastic PTFE Plastic UHMWPE Plastic HDPE Plastic Polypropylene Plastic PMMA Plastic PBT GF30 Plastic PPS GF40 Plastic LCP GF30 Rubber Wood Aluminum Aluminum 6061-T6 Aluminum 7075-T6 Aluminum 2024-T351 Aluminum 5052-H32 Aluminum 7050-T7451 Aluminum A380 Aluminum 6063-T6 Aluminum 1100-O Aluminum ADC12 Steel Steel AISI 1018 Steel AISI 1045 Steel AISI 4340 Steel A992 Iron Titanium Titanium Ti-6Al-4V Stainless Steel 304 Stainless Steel 316 Stainless Steel 303 Stainless Steel 17-4PH Brass C360 Brass C260 Copper C110 Glass Nickel Inconel 718 Magnesium AZ31B-H24 Magnesium AZ91D Zinc Zamak 3 FDM ASA FDM Polycarbonate FDM PAHT-CF FDM HIPS SLA Resin Standard SLA Resin Tough 2000 SLA Resin Elastic 50A SLS PA12 Nylon DMLS AlSi10Mg Aluminum DMLS Ti-6Al-4V ELI Titanium DMLS 316L Stainless Steel DMLS 17-4PH Stainless Steel Concrete Brick Plywood Drywall PCB Laminate FR-4 Silicon Ceramic Alumina 96% Ceramic Aluminum Nitride Solder SAC305 Plastic LCP GF30 Bulk polymer (molded or machined) Plastic PLA Plastic PETG Plastic ABS Plastic TPU Plastic Nylon Plastic ABS (bulk/injection) Plastic Polycarbonate Plastic POM/Acetal Plastic Nylon PA6 Plastic Nylon PA66 Plastic PEEK Plastic PTFE Plastic UHMWPE Plastic HDPE Plastic Polypropylene Plastic PMMA Plastic PBT GF30 Plastic PPS GF40 Plastic LCP GF30 Rubber Wood Aluminum Aluminum 6061-T6 Aluminum 7075-T6 Aluminum 2024-T351 Aluminum 5052-H32 Aluminum 7050-T7451 Aluminum A380 Aluminum 6063-T6 Aluminum 1100-O Aluminum ADC12 Steel Steel AISI 1018 Steel AISI 1045 Steel AISI 4340 Steel A992 Iron Titanium Titanium Ti-6Al-4V Stainless Steel 304 Stainless Steel 316 Stainless Steel 303 Stainless Steel 17-4PH Brass C360 Brass C260 Copper C110 Glass Nickel Inconel 718 Magnesium AZ31B-H24 Magnesium AZ91D Zinc Zamak 3 FDM ASA FDM Polycarbonate FDM PAHT-CF FDM HIPS SLA Resin Standard SLA Resin Tough 2000 SLA Resin Elastic 50A SLS PA12 Nylon DMLS AlSi10Mg Aluminum DMLS Ti-6Al-4V ELI Titanium DMLS 316L Stainless Steel DMLS 17-4PH Stainless Steel Concrete Brick Plywood Drywall PCB Laminate FR-4 Silicon Ceramic Alumina 96% Ceramic Aluminum Nitride Solder SAC305 Steel AISI 4340 Wrought 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 not given (tensile used) 1,035 MPa source typical, transverse Ultimate tensile strength 115 MPa source tensile strength (ISO 527) 1,140 MPa source typical, transverse Flexural strength 184 MPa source typical (ISO 178) not sourced Elongation at break 1.5 % source tensile elongation (ISO 527) 18 % source typical, transverse Young's modulus (stiffness) 11.5 GPa source tensile modulus (ISO 527) 200 GPa source MIL-HDBK-5J design value (AISI 4340, quenched and tempered) Density 1,610 kg/m³ source typical 4.87x lighter 7,840 kg/m³ source typical Strength to weight 71.4 kN·m/kg 132 kN·m/kg 1.85x higher Stiffness to weight 7.14 MN·m/kg 25.5 MN·m/kg 3.57x higher Poisson's ratio not sourced 0.32 source MIL-HDBK-5J design value (AISI 4340, quenched and tempered) Shear modulus not sourced 75.7 GPa Bulk modulus not sourced 185 GPa Speed of sound 2,673 m/s 5,049 m/s Thermal Thermal conductivity 0.5 W/m·K source hot disk (ISO 22007-2), temperature not stated 37.5 W/m·K source typical Thermal expansion 20 µm/m·K source flow direction (MD), mean 50-150 °C 11.3 µm/m·K source mean, -18 to 93 °C 100 mm part over a 50 °C swing 100 µm growth 56.5 µm growth 1.77x less Specific heat 839 J/kg·K source ASTM E1269, temperature not stated 448 J/kg·K source typical Heats up and cools (diffusivity) 0.37 mm²/s 10.7 mm²/s 28.8x faster Thermal shock resistance not sourced 11,678 W/m Max service temperature 288 °C source HDT 1.8 MPa (ISO 75) not sourced Values for Sumitomo Chemical SUMIKASUPER LCP E6006L (30% glass fibre; high strength, low shrinkage); SUMIKASUPER LCP Technical Note, Version 04 / Nov. 2023, typical values. Carpenter (Latrobe) Lescalloy 4340 VAC-ARC datasheet; mechanical row for 1100 °F temper; physical properties grade-level
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 LCP GF30 stronger than Steel AISI 4340? Steel AISI 4340 is stronger: its yield strength is 1,035 MPa against tensile strength 115 MPa for Plastic LCP GF30 (9x).
Which is lighter, Plastic LCP GF30 or Steel AISI 4340? Plastic LCP GF30 is lighter: 1,610 kg/m³ against 7,840 kg/m³ for Steel AISI 4340.
Which is stiffer, Plastic LCP GF30 or Steel AISI 4340? Steel AISI 4340 is stiffer: Young's modulus 200 GPa against 11.5 GPa for Plastic LCP GF30, so the same part in Steel AISI 4340 deflects less under the same load.
Which is lighter for the same job, Plastic LCP GF30 or Steel AISI 4340? For the same stiffness or strength: Plastic LCP GF30 is lighter for a stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate; Steel AISI 4340 is lighter for a stiff rod or tie (tension), strong rod or tie.
Part that must be Plastic LCP GF30 Steel AISI 4340 Stiff rod or tie (tension) 3.57x heavier lighter Stiff beam (bending) lighter 17% heavier Stiff panel or plate lighter 1.88x heavier Strong rod or tie 1.85x heavier lighter Strong beam lighter 13% heavier Strong panel or plate lighter 1.62x 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, Plastic LCP GF30 or Steel AISI 4340? Steel AISI 4340 conducts heat better: 37.5 W/m·K against 0.5 W/m·K for Plastic LCP GF30.
Which expands less with temperature? Steel AISI 4340 expands less: 11.3 µm/m·K against 20 µm/m·K for Plastic LCP GF30.
Among 72 materials 1k 10k 0.1 1 10 100 Density (kg/m³) Young's modulus (GPa) Plastic PLA Plastic PETG Plastic ABS Plastic TPU Plastic Nylon Aluminum Steel Iron Titanium Steel AISI 1018 Stainless Steel 304 Stainless Steel 316 Aluminum 6061-T6 Aluminum 7075-T6 Brass C360 Copper C110 Glass Steel AISI 1045 Steel A992 Stainless Steel 303 Stainless Steel 17-4PH Aluminum 2024-T351 Aluminum 5052-H32 Aluminum 7050-T7451 Titanium Ti-6Al-4V Brass C260 Nickel Inconel 718 Magnesium AZ31B-H24 Zinc Zamak 3 Plastic ABS (bulk/injection) Plastic Polycarbonate Plastic POM/Acetal Plastic Nylon PA6 Plastic Nylon PA66 Plastic PEEK Plastic UHMWPE Plastic HDPE Plastic Polypropylene Plastic PMMA FDM ASA FDM Polycarbonate FDM PAHT-CF FDM HIPS SLA Resin Tough 2000 SLS PA12 Nylon DMLS AlSi10Mg Aluminum DMLS Ti-6Al-4V ELI Titanium DMLS 316L Stainless Steel DMLS 17-4PH Stainless Steel PCB Laminate FR-4 Silicon Ceramic Alumina 96% Ceramic Aluminum Nitride Aluminum A380 Aluminum 6063-T6 Aluminum 1100-O Aluminum ADC12 Magnesium AZ91D Solder SAC305 Plastic PBT GF30 Plastic PPS GF40 Plastic LCP GF30 Steel AISI 4340 Stiffness against density 1k 10k 10 100 1k Density (kg/m³) Yield strength (MPa) Plastic PLA Plastic PETG Plastic ABS Plastic TPU Plastic Nylon Rubber Aluminum Steel Iron Titanium Steel AISI 1018 Stainless Steel 304 Stainless Steel 316 Aluminum 6061-T6 Aluminum 7075-T6 Brass C360 Copper C110 Glass Steel AISI 1045 Steel A992 Stainless Steel 303 Stainless Steel 17-4PH Aluminum 2024-T351 Aluminum 5052-H32 Aluminum 7050-T7451 Titanium Ti-6Al-4V Brass C260 Nickel Inconel 718 Magnesium AZ31B-H24 Zinc Zamak 3 Plastic ABS (bulk/injection) Plastic Polycarbonate Plastic POM/Acetal Plastic Nylon PA6 Plastic Nylon PA66 Plastic PEEK Plastic PTFE Plastic UHMWPE Plastic HDPE Plastic Polypropylene Plastic PMMA FDM ASA FDM Polycarbonate FDM PAHT-CF FDM HIPS SLA Resin Tough 2000 SLA Resin Elastic 50A SLS PA12 Nylon DMLS AlSi10Mg Aluminum DMLS Ti-6Al-4V ELI Titanium DMLS 316L Stainless Steel DMLS 17-4PH Stainless Steel Brick PCB Laminate FR-4 Silicon Ceramic Alumina 96% Aluminum A380 Aluminum 6063-T6 Aluminum 1100-O Aluminum ADC12 Magnesium AZ91D Solder SAC305 Plastic PBT GF30 Plastic PPS GF40 Plastic LCP GF30 Steel AISI 4340 Strength against density