Materials / Compare

DMLS 17-4PH Stainless Steel vs. Steel AISI 4340

Compare DMLS 17-4PH Stainless Steel vs. Steel AISI 4340 strength, stiffness, weight and thermal properties.

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DMLS 17-4PH Stainless Steel3D printed metal (DMLS)
Steel AISI 4340Wrought
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Mechanical
Yield strength861MPasourcemean, as built, horizontal (N=72)1,035MPasourcetypical, transverse
Ultimate tensile strength886MPasourcemean, as built, horizontal (N=72)1,140MPasourcetypical, transverse
Elongation at break19.9%sourcemean at break, as built, horizontal18%sourcetypical, transverse
Young's modulus (stiffness)197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs)200GPasourceMIL-HDBK-5J design value (AISI 4340, quenched and tempered)
Density7,790kg/m³sourcemean part density (ISO 3369)7,840kg/m³sourcetypical
Strength to weight110kN·m/kg132kN·m/kg19% higher
Stiffness to weight25.3MN·m/kg25.5MN·m/kg
Poisson's ratio0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs)0.32sourceMIL-HDBK-5J design value (AISI 4340, quenched and tempered)
Shear modulus77.4GPa2% stiffer in shear75.7GPa
Bulk modulus144GPa185GPa
Speed of sound5,029m/s5,049m/s
Thermal
Thermal conductivity17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs)37.5W/m·Ksourcetypical
Thermal expansion10.4µm/m·Ksourcemean 25-100 °C, ASTM E228, AFTER atmospheric heat treatment (as-built value not published)11.3µm/m·Ksourcemean, -18 to 93 °C
100 mm part over a 50 °C swing52µm growth9% less56.5µm growth
Specific heat460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs)448J/kg·Ksourcetypical
Heats up and cools (diffusivity)5mm²/s10.7mm²/s2.14x faster
Thermal shock resistance5,474W/m11,678W/m2.13x more resistant
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 E8MCarpenter (Latrobe) Lescalloy 4340 VAC-ARC datasheet; mechanical row for 1100 °F temper; physical properties grade-level

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 Steel AISI 4340?

Steel AISI 4340 is stronger: its yield strength is 1,035 MPa against 861 MPa for DMLS 17-4PH Stainless Steel (20%).

Which is lighter, DMLS 17-4PH Stainless Steel or Steel AISI 4340?

DMLS 17-4PH Stainless Steel is lighter: 7,790 kg/m³ against 7,840 kg/m³ for Steel AISI 4340.

Which is stiffer, DMLS 17-4PH Stainless Steel or Steel AISI 4340?

Steel AISI 4340 is stiffer: Young's modulus 200 GPa against 197 GPa for DMLS 17-4PH Stainless Steel, so the same part in Steel AISI 4340 deflects less under the same load.

Which is lighter for the same job, DMLS 17-4PH Stainless Steel or Steel AISI 4340?

For the same stiffness or strength: Steel AISI 4340 is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must beDMLS 17-4PH Stainless SteelSteel AISI 4340
Stiff rod or tie (tension)about equalabout equal
Stiff beam (bending)about equalabout equal
Stiff panel or plateabout equalabout equal
Strong rod or tie19% heavierlighter
Strong beam12% heavierlighter
Strong panel or plate9% heavierlighter

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 Steel AISI 4340?

Steel AISI 4340 conducts heat better: 37.5 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 11.3 µm/m·K for Steel AISI 4340.

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 A992Stainless 303Stainless 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 SteelSteel AISI 4340
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 A992Stainless 303Stainless 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 SteelSteel AISI 4340
Strength against density

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