Materials / Compare

Nickel Inconel 718 vs. Plastic PPS GF40

Compare Nickel Inconel 718 vs. Plastic PPS GF40 strength, stiffness, weight and thermal properties.

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Nickel Inconel 718Wrought
Plastic PPS GF40Bulk polymer (molded or machined)
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Mechanical
Yield strength1,207MPasourcetypical, 1.0 in. hot-rolled bar, 0.2% offsetnot given (tensile used)
Ultimate tensile strength1,389MPasourcetypical, 1.0 in. bar195MPasourcetensile strength, 5 mm/min
Flexural strengthnot sourced285MPasourceflexural strength at break
Elongation at break20%sourcetypical, 1.0 in. bar1.9%sourcestrain at break, 5 mm/min
Young's modulus (stiffness)200GPasourcetypical, 21 °C, annealed + aged14.7GPasourcetypical, 1 mm/min
Density8,221kg/m³sourcenominal, annealed and aged1,650kg/m³sourcetypical
Strength to weight147kN·m/kg24% higher118kN·m/kg
Stiffness to weight24.3MN·m/kg2.73x higher8.91MN·m/kg
Poisson's ratio0.294sourcetypical, 21 °C, annealed + aged0.35sourceglass-reinforced Fortron PPS (class value, not grade-specific)
Shear modulus77.3GPa14.2x stiffer in shear5.44GPa
Bulk modulus162GPa16.3GPa
Speed of sound4,932m/s2,985m/s
Thermal
Thermal conductivity11.4W/m·Ksourcetypical, 21 °C, annealed + aged (calculated from resistivity per footnote a)0.2W/m·Ksource40% glass-reinforced Fortron, 25 °C (not grade-specific)
Thermal expansion13.2µm/m·Ksourcetypical, mean 21-93 °C, annealed + aged12µm/m·Ksourceparallel (flow), mean -50 to 90 °C
100 mm part over a 50 °C swing66µm growth60µm growth10% less
Specific heat435J/kg·Ksourcetypical, 21 °Cnot sourced
Heats up and cools (diffusivity)3.19mm²/snot sourced
Thermal shock resistance3,680W/m25.6x more resistant144W/m
Melting point1,260–1,336°Csourcemelting range280°CsourceDSC, 10 °C/min
Glass transitionnot sourced90°CsourceDSC, 10 °C/min
Max service temperature704°Csourceupper use temperature stated by producer270°CsourceHDT 1.8 MPa
Values forINCONEL alloy 718, standard grade, 1750 °F/1 hr anneal + 1325 °F/8 hr F.C. to 1150 °F aged; Special Metals bulletin SMC-045 typical valuesCelanese 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 Nickel Inconel 718 stronger than Plastic PPS GF40?

Nickel Inconel 718 is stronger: its yield strength is 1,207 MPa against tensile strength 195 MPa for Plastic PPS GF40 (6.19x).

Which is lighter, Nickel Inconel 718 or Plastic PPS GF40?

Plastic PPS GF40 is lighter: 1,650 kg/m³ against 8,221 kg/m³ for Nickel Inconel 718.

Which is stiffer, Nickel Inconel 718 or Plastic PPS GF40?

Nickel Inconel 718 is stiffer: Young's modulus 200 GPa against 14.7 GPa for Plastic PPS GF40, so the same part in Nickel Inconel 718 deflects less under the same load.

Which is lighter for the same job, Nickel Inconel 718 or Plastic PPS GF40?

For the same stiffness or strength: Nickel Inconel 718 is lighter for a stiff rod or tie (tension), strong rod or tie; Plastic PPS GF40 is lighter for a stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate.

Part that must beNickel Inconel 718Plastic PPS GF40
Stiff rod or tie (tension)lighter2.73x heavier
Stiff beam (bending)35% heavierlighter
Stiff panel or plate2.09x heavierlighter
Strong rod or tielighter24% heavier
Strong beam48% heavierlighter
Strong panel or plate2x 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, Nickel Inconel 718 or Plastic PPS GF40?

Nickel Inconel 718 conducts heat better: 11.4 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 13.2 µm/m·K for Nickel Inconel 718.

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 C260Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic 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 LCP GF30Nickel Inconel 718Plastic PPS GF40
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 C260Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic 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 LCP GF30Nickel Inconel 718Plastic PPS GF40
Strength against density

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