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Magnesium AZ91D vs. Plastic PTFE Compare Magnesium AZ91D vs. Plastic PTFE 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 Magnesium AZ91D Cast 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 PTFE Bulk polymer (molded or machined) 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 150 MPa source typical, 0.2% tensile yield, ambient temperature 9 MPa source typical yield strength at 23 °C (Teflon PTFE, Table 8) Ultimate tensile strength 230 MPa source typical, ambient temperature 39.3 MPa source typical, skived tape 0.13 mm Elongation at break 3 % source typical, ambient temperature 350 % source typical, skived tape 0.13 mm Young's modulus (stiffness) 45 GPa source typical not sourced Density 1,810 kg/m³ source typical 2,160 kg/m³ source typical (standard specific gravity, ASTM D4894) Strength to weight 82.9 kN·m/kg 19.9x higher 4.17 kN·m/kg Stiffness to weight 24.9 MN·m/kg not sourced Poisson's ratio 0.35 source base material: AZ91C casting (MIL-HDBK-5J handbook physical constant) 0.46 source typical, 23 °C (Teflon PTFE resins, Chemours handbook) Shear modulus 16.7 GPa not sourced Bulk modulus 50 GPa not sourced Speed of sound 4,986 m/s not sourced Thermal Thermal conductivity 72 W/m·K source typical 0.25 W/m·K source typical, granular resin, 4.6 mm specimen Thermal expansion 25 µm/m·K source typical, temperature range not stated 100 µm/m·K source typical, granular resin, 23-60 °C (ASTM E228) 100 mm part over a 50 °C swing 125 µm growth 4x less 500 µm growth Specific heat 1,050 J/kg·K source typical 1,400 J/kg·K source typical, granular resin, 20 °C (ASTM D4591) Heats up and cools (diffusivity) 37.9 mm²/s 458x faster 0.0827 mm²/s Thermal shock resistance 6,240 W/m not sourced Melting point 470–595 °C source melting range 327 °C source second melting peak (sintered polymer), +/-10 Max service temperature not sourced 260 °C source service temperature (Chemours general Teflon PTFE statement) Values for ELEKTRON AZ91D magnesium die-casting alloy, as cast; Magnesium Elektron datasheet 475 (7/01), typical properties; Poisson from MIL-HDBK-5J for AZ91C castings. Chemours Teflon PTFE 7C X granular molding resin, typical values (tensile/elongation measured on 0.13 mm skived tape)
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 Magnesium AZ91D stronger than Plastic PTFE? Magnesium AZ91D is stronger: its yield strength is 150 MPa against 9 MPa for Plastic PTFE (16.7x).
Which is lighter, Magnesium AZ91D or Plastic PTFE? Magnesium AZ91D is lighter: 1,810 kg/m³ against 2,160 kg/m³ for Plastic PTFE.
Which is lighter for the same job, Magnesium AZ91D or Plastic PTFE? For the same stiffness or strength: Magnesium AZ91D is lighter for a strong rod or tie, strong beam, strong panel or plate.
Part that must be Magnesium AZ91D Plastic PTFE Strong rod or tie lighter 19.9x heavier Strong beam lighter 7.79x heavier Strong panel or plate lighter 4.87x 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, Magnesium AZ91D or Plastic PTFE? Magnesium AZ91D conducts heat better: 72 W/m·K against 0.25 W/m·K for Plastic PTFE.
Which expands less with temperature? Magnesium AZ91D expands less: 25 µm/m·K against 100 µm/m·K for Plastic PTFE.
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 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 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 Solder SAC305 Plastic PBT GF30 Plastic PPS GF40 Plastic LCP GF30 Magnesium AZ91D 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 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 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 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 Solder SAC305 Plastic PBT GF30 Plastic PPS GF40 Plastic LCP GF30 Magnesium AZ91D Plastic PTFE Strength against density