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DMLS 17-4PH Stainless Steel vs. Stainless Steel 303

Compare DMLS 17-4PH Stainless Steel vs. Stainless Steel 303 strength, stiffness, weight and thermal properties.

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DMLS 17-4PH Stainless Steel3D printed metal (DMLS)
Stainless Steel 303Wrought
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Mechanical
Yield strength861MPasourcemean, as built, horizontal (N=72)275MPasourceOutokumpu typical (product P = hot rolled plate, transverse)
Ultimate tensile strength886MPasourcemean, as built, horizontal (N=72)585MPasourceOutokumpu typical
Elongation at break19.9%sourcemean at break, as built, horizontal35%sourceOutokumpu typical, A5
Young's modulus (stiffness)197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs)200GPasourceat RT (Table 12)
Density7,790kg/m³sourcemean part density (ISO 3369)7,900kg/m³sourceat RT
Strength to weight110kN·m/kg3.17x higher34.8kN·m/kg
Stiffness to weight25.3MN·m/kg25.3MN·m/kg
Poisson's ratio0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs)0.3sourcedesign value (structural stainless steels)
Shear modulus77.4GPa76.9GPa
Bulk modulus144GPa167GPa
Speed of sound5,029m/s5,032m/s
Thermal
Thermal conductivity17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs)15W/m·Ksourceat RT
Thermal expansion10.4µm/m·Ksourcemean 25-100 °C, ASTM E228, AFTER atmospheric heat treatment (as-built value not published)16µm/m·Ksourcemean, 20–100 °C
100 mm part over a 50 °C swing52µm growth1.54x less80µm growth
Specific heat460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs)500J/kg·Ksourceat RT
Heats up and cools (diffusivity)5mm²/s32% faster3.8mm²/s
Thermal shock resistance5,474W/m6.07x more resistant902W/m
Max service temperaturenot sourced871°Csourcecontinuous, scaling limit
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 E8M1.4305 / UNS S30300, Outokumpu typical values (hot rolled, solution annealed) from 'Steel Grades, Properties and Global Standards'; max service from Carpenter CarTech 303 datasheet

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 Stainless Steel 303?

DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against 275 MPa for Stainless Steel 303 (3.13x).

Which is lighter, DMLS 17-4PH Stainless Steel or Stainless Steel 303?

DMLS 17-4PH Stainless Steel is lighter: 7,790 kg/m³ against 7,900 kg/m³ for Stainless Steel 303.

Which is stiffer, DMLS 17-4PH Stainless Steel or Stainless Steel 303?

Stainless Steel 303 is stiffer: Young's modulus 200 GPa against 197 GPa for DMLS 17-4PH Stainless Steel, so the same part in Stainless Steel 303 deflects less under the same load.

Which is lighter for the same job, DMLS 17-4PH Stainless Steel or Stainless Steel 303?

For the same stiffness or strength: DMLS 17-4PH Stainless Steel is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must beDMLS 17-4PH Stainless SteelStainless Steel 303
Stiff rod or tie (tension)about equalabout equal
Stiff beam (bending)about equalabout equal
Stiff panel or plateabout equalabout equal
Strong rod or tielighter3.17x heavier
Strong beamlighter2.17x heavier
Strong panel or platelighter1.79x 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 Stainless Steel 303?

DMLS 17-4PH Stainless Steel conducts heat better: 17.9 W/m·K against 15 W/m·K for Stainless Steel 303.

Which expands less with temperature?

DMLS 17-4PH Stainless Steel expands less: 10.4 µm/m·K against 16 µm/m·K for Stainless Steel 303.

Among 59 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic 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 SteelStainless Steel 303
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic 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 SteelStainless Steel 303
Strength against density

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