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DMLS 17-4PH Stainless Steel vs. Zinc Zamak 3

Compare DMLS 17-4PH Stainless Steel vs. Zinc Zamak 3 strength, stiffness, weight and thermal properties.

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DMLS 17-4PH Stainless Steel3D printed metal (DMLS)
Zinc Zamak 3Cast
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Mechanical
Yield strength861MPasourcemean, as built, horizontal (N=72)221MPasourcetypical
Ultimate tensile strength886MPasourcemean, as built, horizontal (N=72)283MPasourcetypical
Elongation at break19.9%sourcemean at break, as built, horizontal10%sourcetypical, in 2 in.
Young's modulus (stiffness)197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs)85.5GPasourcetypical
Density7,790kg/m³sourcemean part density (ISO 3369)6,600kg/m³sourcetypical
Strength to weight110kN·m/kg3.3x higher33.5kN·m/kg
Stiffness to weight25.3MN·m/kg1.95x higher13MN·m/kg
Poisson's ratio0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs)0.27sourcetypical, Zamak 3 hot-chamber die cast
Shear modulus77.4GPa2.3x stiffer in shear33.7GPa
Bulk modulus144GPa62GPa
Speed of sound5,029m/s3,599m/s
Thermal
Thermal conductivity17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs)113W/m·Ksourcetypical
Thermal expansion10.4µm/m·Ksourcemean 25-100 °C, ASTM E228, AFTER atmospheric heat treatment (as-built value not published)27.4µm/m·Ksourcetypical
100 mm part over a 50 °C swing52µm growth2.63x less137µm growth
Specific heat460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs)419J/kg·Ksourcetypical
Heats up and cools (diffusivity)5mm²/s40.9mm²/s8.19x faster
Thermal shock resistance5,474W/m7,782W/m42% more resistant
Melting pointnot sourced381–387°Csourcemelting range
Values forEOS StainlessSteel 17-4PH IndustryLine (powder 9011-0041), EOS M 290, 40 µm, default job 17-4PH_040_StainlessM291_100, as built, horizontal; ISO 6892 & ASTM E8MZamak 3 (ASTM B86 die cast), Nathan Trotter (zinc alloy producer) technical data sheet, typical 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.

DMLS 17-4PH Stainless Steel is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Is DMLS 17-4PH Stainless Steel stronger than Zinc Zamak 3?

DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against 221 MPa for Zinc Zamak 3 (3.89x).

Which is lighter, DMLS 17-4PH Stainless Steel or Zinc Zamak 3?

Zinc Zamak 3 is lighter: 6,600 kg/m³ against 7,790 kg/m³ for DMLS 17-4PH Stainless Steel.

Which is stiffer, DMLS 17-4PH Stainless Steel or Zinc Zamak 3?

DMLS 17-4PH Stainless Steel is stiffer: Young's modulus 197 GPa against 85.5 GPa for Zinc Zamak 3, so the same part in DMLS 17-4PH Stainless Steel deflects less under the same load.

Which is lighter for the same job, DMLS 17-4PH Stainless Steel or Zinc Zamak 3?

For the same stiffness or strength: DMLS 17-4PH Stainless Steel 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 beDMLS 17-4PH Stainless SteelZinc Zamak 3
Stiff rod or tie (tension)lighter1.95x heavier
Stiff beam (bending)lighter29% heavier
Stiff panel or platelighter12% heavier
Strong rod or tielighter3.3x heavier
Strong beamlighter2.1x heavier
Strong panel or platelighter1.67x 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, DMLS 17-4PH Stainless Steel or Zinc Zamak 3?

Zinc Zamak 3 conducts heat better: 113 W/m·K against 17.9 W/m·K for DMLS 17-4PH Stainless Steel.

Which expands less with temperature?

DMLS 17-4PH Stainless Steel expands less: 10.4 µm/m·K against 27.4 µm/m·K for Zinc Zamak 3.

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 718Magnesium AZ31B-H24Plastic 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 SteelZinc Zamak 3
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 718Magnesium AZ31B-H24Plastic 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 SteelBrickDMLS 17-4PH Stainless SteelZinc Zamak 3
Strength against density

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