Materials / Compare

Plastic ABS (bulk/injection) vs. Plastic POM/Acetal

Compare Plastic ABS (bulk/injection) vs. Plastic POM/Acetal strength, stiffness, weight and thermal properties.

Plastic ABS (bulk/injection)Bulk polymer (molded or machined)
Plastic POM/AcetalBulk polymer (molded or machined)
MechanicalPlastic ABS (bulk/injection)Plastic POM/Acetal
Yield strength45MPa169MPa21.53x stronger
Ultimate tensile strengthnot stated (yield given)69MPa2
Compressive strengthnot sourced124MPa2
Flexural strength65MPa199MPa2
Elongation at break10%175%27.5x more ductile
Young's modulus (stiffness)2.3GPa12.8GPa222% stiffer
Density1,040kg/m³137% lighter1,420kg/m³3
Strength to weight43.3kN·m/kg48.6kN·m/kg12% higher
Stiffness to weight2.21MN·m/kg12% higher1.97MN·m/kg
Poisson's ratio0.3940.352
Shear modulus0.827GPa1.04GPa25% stiffer in shear
Bulk modulus3.48GPa12% higher3.11GPa
Speed of sound1,487m/s6% faster1,404m/s
1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonWoodAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110Copper C10100Copper C12200GlassSteel 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 PolycarbonatePlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin StandardSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelConcretePCB Laminate FR-4SiliconCeramic Alumina 96%Ceramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum 3003-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Plastic ABS (bulk/injection)Plastic POM/Acetal
Stiffness against densityHigher and further left: stiffer for its weight
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberWoodAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110Copper C10100Copper C12200GlassSteel 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 PolycarbonatePlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin StandardSLA 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 3003-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Plastic ABS (bulk/injection)Plastic POM/Acetal
Strength against densityHigher and further left: stronger for its weight
ThermalPlastic ABS (bulk/injection)Plastic POM/Acetal
Thermal conductivity0.17W/m·K10.4W/m·K22.35x more heat through a fin
Thermal expansionrange80–110µm/m·K1mean122µm/m·K2
100 mm part over a 50 °C swing475µm growth28% less610µm growth
Specific heatnot sourcedaverage -18 to 100 °C1,465J/kg·K2
Heats up and cools (diffusivity)not sourced0.192mm²/s
Thermal shock resistance21.4W/m52.5W/m2.46x more resistant
Melting pointnot sourced175°C2
Max service temperatureHDT 1.8 MPa94°C1HDT 1.8 MPa125°C231 °C hotter
1k10k0.1110100Density (kg/m³)Thermal conductivity (W/m·K)Plastic PLAPlastic PETGPlastic ABSPlastic NylonRubberWoodAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110Copper C10100Copper C12200GlassSteel 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 PolycarbonatePlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM HIPSSLA Resin StandardDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelConcreteBrickPCB Laminate FR-4SiliconCeramic Alumina 96%Ceramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum 3003-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Plastic ABS (bulk/injection)Plastic POM/Acetal
Thermal conductivity against densityHigher and further left: spreads more heat for its weight
0.111010010100Thermal conductivity (W/m·K)Thermal expansion (µm/m·K)Plastic PETGPlastic ABSPlastic NylonWoodAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110Copper C10100Copper C12200GlassSteel 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 PolycarbonatePlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM HIPSSLA Resin StandardDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelConcreteBrickPlywoodPCB Laminate FR-4SiliconCeramic Alumina 96%Ceramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum 3003-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Plastic ABS (bulk/injection)Plastic POM/Acetal
Thermal expansion against thermal conductivityLower and further right: warps less when heated
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Sources4 documents: INEOS Styrolution, DuPont, Covestro
Plastic ABS (bulk/injection)
INEOS Styrolution Terluran GP-22 general-purpose injection-molding ABS, ISO typical values (TDS revision 08/01/2022)
Plastic POM/Acetal
DuPont Delrin 100 acetal homopolymer, Table 2 'Typical Properties of Delrin Acetal Resins' (ASTM methods), Delrin Design Guide Module III hosted on delrin.com
  1. 1
    Terluran GP-22 (ABS) Product Data SheetINEOS StyrolutionPlastic ABS (bulk/injection) · Yield strength: typical, tensile stress at yield 23 °CPlastic ABS (bulk/injection) · Flexural strength: typical, 23 °CPlastic ABS (bulk/injection) · Elongation at break: nominal strain at break, 23 °CPlastic ABS (bulk/injection) · Young's modulus (stiffness): typicalPlastic ABS (bulk/injection) · Density: typicalPlastic ABS (bulk/injection) · Thermal conductivity: typicalPlastic ABS (bulk/injection) · Thermal expansion: rangePlastic ABS (bulk/injection) · Max service temperature: HDT 1.8 MPa (annealed 4 h/80 °C)
  2. 2
    Delrin Acetal Resin Design Guide, Module IIIDuPontarchived copyPlastic POM/Acetal · Yield strength: typical (single ASTM D638 tensile strength)Plastic POM/Acetal · Ultimate tensile strength: typicalPlastic POM/Acetal · Compressive strength: compressive stress at 10% deformationPlastic POM/Acetal · Flexural strength: flexural yield strength, typicalPlastic POM/Acetal · Elongation at break: typicalPlastic POM/Acetal · Young's modulus (stiffness): typicalPlastic POM/Acetal · Poisson's ratio: typicalPlastic POM/Acetal · Thermal conductivity: typicalPlastic POM/Acetal · Thermal expansion: mean, 29 to 60 °CPlastic POM/Acetal · Specific heat: average -18 to 100 °C, Delrin acetal resins (not grade-specific)Plastic POM/Acetal · Melting point: crystalline melting pointPlastic POM/Acetal · Max service temperature: HDT 1.8 MPa (annealed)
  3. 3
    Delrin 100 Product Data SheetDuPontPlastic POM/Acetal · Density: typical (DuPont product information for Delrin 100 NC010; 'The data listed here fall within the normal range of product properties')
  4. 4
    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)

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 POM/Acetal?

Plastic POM/Acetal is stronger: its yield strength is 69 MPa against 45 MPa for Plastic ABS (bulk/injection) (1.53x).

Which is lighter, Plastic ABS (bulk/injection) or Plastic POM/Acetal?

Plastic ABS (bulk/injection) is lighter: 1,040 kg/m³ against 1,420 kg/m³ for Plastic POM/Acetal.

Which is stiffer, Plastic ABS (bulk/injection) or Plastic POM/Acetal?

Plastic POM/Acetal is stiffer: Young's modulus 2.8 GPa against 2.3 GPa for Plastic ABS (bulk/injection), so the same part in Plastic POM/Acetal deflects less under the same load.

Which is lighter for the same job, Plastic ABS (bulk/injection) or Plastic POM/Acetal?

For the same stiffness or strength: Plastic ABS (bulk/injection) is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate; Plastic POM/Acetal is lighter for a strong rod or tie.

Part that must bePlastic ABS (bulk/injection)Plastic POM/Acetal
Stiff rod or tie (tension)lighter12% heavier
Stiff beam (bending)lighter24% heavier
Stiff panel or platelighter28% heavier
Strong rod or tie12% heavierlighter
Strong beamlighter3% heavier
Strong panel or platelighter10% 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 is more ductile, Plastic ABS (bulk/injection) or Plastic POM/Acetal?

Plastic POM/Acetal stretches further before it breaks: 75% elongation at break against 10% for Plastic ABS (bulk/injection).

Thermal

Which handles higher temperatures, Plastic ABS (bulk/injection) or Plastic POM/Acetal?

Plastic POM/Acetal does: 125 °C against 94 °C for Plastic ABS (bulk/injection).

Which conducts heat better, Plastic ABS (bulk/injection) or Plastic POM/Acetal?

Plastic POM/Acetal conducts heat better: 0.4 W/m·K against 0.17 W/m·K for Plastic ABS (bulk/injection).

Which expands less with temperature?

Plastic ABS (bulk/injection) expands less: 95 µm/m·K against 122 µm/m·K for Plastic POM/Acetal.

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