Materials / Compare
Plastic Nylon PA6 vs. Plastic Nylon PA66 Compare Plastic Nylon PA6 vs. Plastic Nylon PA66 strength, stiffness, weight and thermal properties.
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 3003-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 Copper C10100 Copper C12200 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 PCB Board FR-4, 2 copper planes Silicon Ceramic Alumina 96% Ceramic Aluminum Nitride Solder SAC305 Plastic Nylon PA6 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 3003-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 Copper C10100 Copper C12200 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 PCB Board FR-4, 2 copper planes Silicon Ceramic Alumina 96% Ceramic Aluminum Nitride Solder SAC305 Plastic Nylon PA66 Bulk polymer (molded or machined) Mechanical Plastic Nylon PA6 Plastic Nylon PA66 Yield strength 90 MPa 85 MPa Ultimate tensile strength not stated (yield given) not stated (yield given) Elongation at break 10 % 30 % 3x more ductile Young's modulus (stiffness) 3.5 GPa 17% stiffer 3 GPa Density 1,130 kg/m³ 1,130 kg/m³ Strength to weight 79.6 kN·m/kg 6% higher 75.2 kN·m/kg Stiffness to weight 3.1 MN·m/kg 17% higher 2.65 MN·m/kg Poisson's ratio base material 0.4 base material 0.4 Shear modulus 1.25 GPa 17% stiffer in shear 1.07 GPa Bulk modulus 5.83 GPa 17% higher 5 GPa Speed of sound 1,760 m/s 8% faster 1,629 m/s
1k 10k 0.1 1 10 100 Density (kg/m³) Young's modulus (GPa) Plastic PLA Plastic PETG Plastic ABS Plastic TPU Plastic Nylon Wood Aluminum Steel Iron Titanium Steel AISI 1018 Stainless Steel 304 Stainless Steel 316 Aluminum 6061-T6 Aluminum 7075-T6 Brass C360 Copper C110 Copper C10100 Copper C12200 Glass Steel AISI 1045 Steel AISI 4340 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 PEEK Plastic UHMWPE Plastic HDPE Plastic Polypropylene Plastic PMMA FDM ASA FDM Polycarbonate FDM PAHT-CF FDM HIPS SLA Resin Standard 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 Concrete PCB Laminate FR-4 Silicon Ceramic Alumina 96% Ceramic Aluminum Nitride Aluminum A380 Aluminum 6063-T6 Aluminum 1100-O Aluminum 3003-O Aluminum ADC12 Magnesium AZ91D Solder SAC305 Plastic PBT GF30 Plastic PPS GF40 Plastic LCP GF30 Plastic Nylon PA6 Plastic Nylon PA66 Stiffness against densityHigher and further left: stiffer for its weight 1k 10k 10 100 1k Density (kg/m³) Yield strength (MPa) Plastic PLA Plastic PETG Plastic ABS Plastic TPU Plastic Nylon Rubber Wood Aluminum Steel Iron Titanium Steel AISI 1018 Stainless Steel 304 Stainless Steel 316 Aluminum 6061-T6 Aluminum 7075-T6 Brass C360 Copper C110 Copper C10100 Copper C12200 Glass Steel AISI 1045 Steel AISI 4340 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 PEEK Plastic PTFE Plastic UHMWPE Plastic HDPE Plastic Polypropylene Plastic PMMA 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 Brick PCB Laminate FR-4 Silicon Ceramic Alumina 96% Aluminum A380 Aluminum 6063-T6 Aluminum 1100-O Aluminum 3003-O Aluminum ADC12 Magnesium AZ91D Solder SAC305 Plastic PBT GF30 Plastic PPS GF40 Plastic LCP GF30 Plastic Nylon PA6 Plastic Nylon PA66 Strength against densityHigher and further left: stronger for its weight
Thermal Plastic Nylon PA6 Plastic Nylon PA66 Thermal conductivity 0.33 W/m·K 0.33 W/m·K Thermal expansion longitudinal 102 µm/m·K longitudinal 98 µm/m·K 100 mm part over a 50 °C swing 510 µm growth 490 µm growth 4% less Specific heat 1,700 J/kg·K 1,700 J/kg·K Heats up and cools (diffusivity) 0.172 mm²/s 0.172 mm²/s Thermal shock resistance 49.9 W/m 57.2 W/m 15% more resistant Melting point DSC 220 °C DSC 260 °C 40 °C higher Max service temperature 87 °C 101 °C 14 °C hotter
1k 10k 0.1 1 10 100 Density (kg/m³) Thermal conductivity (W/m·K) Plastic PLA Plastic PETG Plastic ABS Plastic Nylon Rubber Wood Aluminum Steel Iron Titanium Steel AISI 1018 Stainless Steel 304 Stainless Steel 316 Aluminum 6061-T6 Aluminum 7075-T6 Brass C360 Copper C110 Copper C10100 Copper C12200 Glass Steel AISI 1045 Steel AISI 4340 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 PEEK Plastic PTFE Plastic UHMWPE Plastic HDPE Plastic Polypropylene Plastic PMMA FDM ASA FDM Polycarbonate FDM HIPS SLA Resin Standard DMLS AlSi10Mg Aluminum DMLS Ti-6Al-4V ELI Titanium DMLS 316L Stainless Steel DMLS 17-4PH Stainless Steel Concrete Brick PCB Laminate FR-4 Silicon Ceramic Alumina 96% Ceramic Aluminum Nitride Aluminum A380 Aluminum 6063-T6 Aluminum 1100-O Aluminum 3003-O Aluminum ADC12 Magnesium AZ91D Solder SAC305 Plastic PBT GF30 Plastic PPS GF40 Plastic LCP GF30 Plastic Nylon PA6 Plastic Nylon PA66 Thermal conductivity against densityHigher and further left: spreads more heat for its weight 0.1 1 10 100 10 100 Thermal conductivity (W/m·K) Thermal expansion (µm/m·K) Plastic PETG Plastic ABS Plastic Nylon Wood Aluminum Steel Iron Titanium Steel AISI 1018 Stainless Steel 304 Stainless Steel 316 Aluminum 6061-T6 Aluminum 7075-T6 Brass C360 Copper C110 Copper C10100 Copper C12200 Glass Steel AISI 1045 Steel AISI 4340 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 PEEK Plastic PTFE Plastic UHMWPE Plastic HDPE Plastic Polypropylene Plastic PMMA FDM ASA FDM Polycarbonate FDM HIPS SLA Resin Standard DMLS AlSi10Mg Aluminum DMLS Ti-6Al-4V ELI Titanium DMLS 316L Stainless Steel DMLS 17-4PH Stainless Steel Concrete Brick Plywood PCB Laminate FR-4 Silicon Ceramic Alumina 96% Ceramic Aluminum Nitride Aluminum A380 Aluminum 6063-T6 Aluminum 1100-O Aluminum 3003-O Aluminum ADC12 Magnesium AZ91D Solder SAC305 Plastic PBT GF30 Plastic PPS GF40 Plastic LCP GF30 Plastic Nylon PA6 Plastic Nylon PA66 Thermal expansion against thermal conductivityLower and further right: warps less when heated
Sources 3 documents: BASF, Covestro
Plastic Nylon PA6 BASF Ultramid B3S (PA6, unreinforced injection-moulding grade), Product Information 02/2026, dry values (ISO methods)
Plastic Nylon PA66 BASF Ultramid A3K (PA66, unreinforced injection-moulding grade), Product Information 02/2026, dry values (ISO methods) 1 Ultramid B3S Product Information BASF Plastic Nylon PA6 · Yield strength: typical, dryPlastic Nylon PA6 · Elongation at break: nominal strain at break, dryPlastic Nylon PA6 · Young's modulus (stiffness): typical, dryPlastic Nylon PA6 · Density: typicalPlastic Nylon PA6 · Thermal conductivity: typicalPlastic Nylon PA6 · Thermal expansion: longitudinal, 23-55 °CPlastic Nylon PA6 · Specific heat: typicalPlastic Nylon PA6 · Melting point: DSCPlastic Nylon PA6 · Max service temperature: IEC 60216 temperature index, 20000 h
2 Ultramid A3K Product Information BASF Plastic Nylon PA66 · Yield strength: typical, dryPlastic Nylon PA66 · Elongation at break: nominal strain at break, dryPlastic Nylon PA66 · Young's modulus (stiffness): typical, dryPlastic Nylon PA66 · Density: typicalPlastic Nylon PA66 · Thermal conductivity: typicalPlastic Nylon PA66 · Thermal expansion: longitudinal, 23-55 °CPlastic Nylon PA66 · Specific heat: typicalPlastic Nylon PA66 · Melting point: DSCPlastic Nylon PA66 · Max service temperature: IEC 60216 temperature index, 20000 h
3 Engineering Polymers Part and Mold Design: Thermoplastics, A Design Guide Covestro Plastic Nylon PA6 · Poisson's ratio: base material: unfilled polyamide (PA), conditioned, maker design-guide family value (Covestro Table 3-1)Plastic Nylon PA66 · Poisson's ratio: base material: unfilled polyamide (PA), conditioned, maker design-guide family value (Covestro 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 Nylon PA6 stronger than Plastic Nylon PA66? Plastic Nylon PA6 is stronger: its yield strength is 90 MPa against 85 MPa for Plastic Nylon PA66 (6%).
Which is lighter, Plastic Nylon PA6 or Plastic Nylon PA66? Plastic Nylon PA6 is lighter: 1,130 kg/m³ against 1,130 kg/m³ for Plastic Nylon PA66.
Which is stiffer, Plastic Nylon PA6 or Plastic Nylon PA66? Plastic Nylon PA6 is stiffer: Young's modulus 3.5 GPa against 3 GPa for Plastic Nylon PA66, so the same part in Plastic Nylon PA6 deflects less under the same load.
Which is lighter for the same job, Plastic Nylon PA6 or Plastic Nylon PA66? For the same stiffness or strength: Plastic Nylon PA6 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 be Plastic Nylon PA6 Plastic Nylon PA66 Stiff rod or tie (tension) lighter 17% heavier Stiff beam (bending) lighter 8% heavier Stiff panel or plate lighter 5% heavier Strong rod or tie lighter 6% heavier Strong beam lighter 4% heavier Strong panel or plate lighter 3% 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 Nylon PA6 or Plastic Nylon PA66? Plastic Nylon PA66 stretches further before it breaks: 30% elongation at break against 10% for Plastic Nylon PA6.
Thermal Which handles higher temperatures, Plastic Nylon PA6 or Plastic Nylon PA66? Plastic Nylon PA66 does: 101 °C against 87 °C for Plastic Nylon PA6, both IEC 60216 temperature index, 20000 h.
Which conducts heat better, Plastic Nylon PA6 or Plastic Nylon PA66? Plastic Nylon PA6 conducts heat better: 0.33 W/m·K against 0.33 W/m·K for Plastic Nylon PA66.
Which expands less with temperature? Plastic Nylon PA66 expands less: 98 µm/m·K against 102 µm/m·K for Plastic Nylon PA6.