Materials / Compare

Magnesium AZ31B-H24 vs. Plastic Polypropylene

Compare Magnesium AZ31B-H24 vs. Plastic Polypropylene strength, stiffness, weight and thermal properties.

Change either side
Magnesium AZ31B-H24Wrought
Plastic PolypropyleneBulk polymer (molded or machined)
Try it on a partA bracket to run stress or thermal on, free in your browserOpen in LessCADOpen in LessCAD
Mechanical
Yield strength220MPasourcetypical, H24, 0.5-6 mm, 0.2 % proof stress33MPasourcetypical, tensile stress at yield ISO 527
Ultimate tensile strength290MPasourcetypical, H24, 0.5-6 mmnot sourced
Elongation at break13%sourcetypical, H24, 0.5-6 mm, gauge 5.65√Anot sourced
Young's modulus (stiffness)44.8GPasourcetypical (handbook physical constant)1.45GPasourcetypical, tensile modulus ISO 527
Density1,769kg/m³sourcenominal900kg/m³sourcetypical, 23 °C ISO 1183-1
Strength to weight124kN·m/kg3.39x higher36.7kN·m/kg
Stiffness to weight25.3MN·m/kg15.7x higher1.61MN·m/kg
Poisson's ratio0.35sourcetypical (handbook physical constant)0.42sourcebase material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene)
Shear modulus16.6GPa32.5x stiffer in shear0.511GPa
Bulk modulus49.8GPa3.02GPa
Speed of sound5,032m/s1,269m/s
Thermal
Thermal conductivity76.9W/m·Ksourcetypical (temper/temperature not stated)0.17–0.22W/m·Ksourcebase material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene)
Thermal expansion26.8µm/m·Ksourcetypical (temperature range not stated)80–100µm/m·Ksourcebase material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene)
100 mm part over a 50 °C swing134µm growth3.36x less450µm growth
Specific heat1,040J/kg·Ksourcetypicalnot sourced
Heats up and cools (diffusivity)41.8mm²/snot sourced
Thermal shock resistance9,159W/m320x more resistant28.6W/m
Max service temperature149°Csourcestated application limit90°CsourceHDT 0.45 MPa (ISO 75B), unannealed
Values forAZ31B-H24 sheet 0.016-0.062 in., MIL-HDBK-5J Table 4.2.1.0(b) (AMS 4377); strengths are S-basis MINIMUMSLyondellBasell Moplen HP501H polypropylene homopolymer (general purpose), typical ISO values

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 AZ31B-H24 stronger than Plastic Polypropylene?

Magnesium AZ31B-H24 is stronger: its yield strength is 220 MPa against 33 MPa for Plastic Polypropylene (6.67x).

Which is lighter, Magnesium AZ31B-H24 or Plastic Polypropylene?

Plastic Polypropylene is lighter: 900 kg/m³ against 1,769 kg/m³ for Magnesium AZ31B-H24.

Which is stiffer, Magnesium AZ31B-H24 or Plastic Polypropylene?

Magnesium AZ31B-H24 is stiffer: Young's modulus 44.8 GPa against 1.45 GPa for Plastic Polypropylene, so the same part in Magnesium AZ31B-H24 deflects less under the same load.

Which is lighter for the same job, Magnesium AZ31B-H24 or Plastic Polypropylene?

For the same stiffness or strength: Magnesium AZ31B-H24 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 beMagnesium AZ31B-H24Plastic Polypropylene
Stiff rod or tie (tension)lighter15.7x heavier
Stiff beam (bending)lighter2.83x heavier
Stiff panel or platelighter1.6x heavier
Strong rod or tielighter3.39x heavier
Strong beamlighter1.8x heavier
Strong panel or platelighter31% 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 AZ31B-H24 or Plastic Polypropylene?

Magnesium AZ31B-H24 conducts heat better: 76.9 W/m·K against 0.195 W/m·K for Plastic Polypropylene.

Which expands less with temperature?

Magnesium AZ31B-H24 expands less: 26.8 µm/m·K against 90 µm/m·K for Plastic Polypropylene.

Among 59 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless 304Stainless 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless 303Stainless 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelMagnesium AZ31B-H24Plastic Polypropylene
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless 304Stainless 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless 303Stainless 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic 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 SteelBrickMagnesium AZ31B-H24Plastic Polypropylene
Strength against density

Related comparisons