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DMLS 17-4PH Stainless Steel vs. Steel AISI 1045

Compare DMLS 17-4PH Stainless Steel vs. Steel AISI 1045 strength, stiffness, weight and thermal properties.

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DMLS 17-4PH Stainless Steel3D printed metal (DMLS)
Steel AISI 1045Wrought
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Mechanical
Yield strength861MPasourcemean, as built, horizontal (N=72)531MPasourceproducer-stated, cold drawn
Ultimate tensile strength886MPasourcemean, as built, horizontal (N=72)627MPasourceproducer-stated, cold drawn
Elongation at break19.9%sourcemean at break, as built, horizontal12%sourcein 2 in (50.8 mm)
Young's modulus (stiffness)197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs)210GPasourcetypical
Density7,790kg/m³sourcemean part density (ISO 3369)7,800kg/m³sourcetypical
Strength to weight110kN·m/kg1.62x higher68.1kN·m/kg
Stiffness to weight25.3MN·m/kg26.9MN·m/kg6% higher
Poisson's ratio0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs)0.3sourcetypical
Shear modulus77.4GPa80.8GPa4% stiffer in shear
Bulk modulus144GPa175GPa
Speed of sound5,029m/s5,189m/s
Thermal
Thermal conductivity17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs)40–45W/m·Ksourcetypical range, ambient
Thermal expansion10.4µm/m·Ksourcemean 25-100 °C, ASTM E228, AFTER atmospheric heat treatment (as-built value not published)12µm/m·Ksourcetypical, mean 20-300 °C
100 mm part over a 50 °C swing52µm growth15% less60µm growth
Specific heat460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs)460–480J/kg·Ksourcetypical range, 50/100 °C
Heats up and cools (diffusivity)5mm²/s11.6mm²/s2.32x faster
Thermal shock resistance5,474W/m6,269W/m15% 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 E8MAISI 1045 cold drawn bar (Niagara LaSalle) for mechanical; Ovako C45 (lists 'SAE 1045' as a similar designation) for physical constants

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 1045?

DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against 531 MPa for Steel AISI 1045 (1.62x).

Which is lighter, DMLS 17-4PH Stainless Steel or Steel AISI 1045?

DMLS 17-4PH Stainless Steel is lighter: 7,790 kg/m³ against 7,800 kg/m³ for Steel AISI 1045.

Which is stiffer, DMLS 17-4PH Stainless Steel or Steel AISI 1045?

Steel AISI 1045 is stiffer: Young's modulus 210 GPa against 197 GPa for DMLS 17-4PH Stainless Steel, so the same part in Steel AISI 1045 deflects less under the same load.

Which is lighter for the same job, DMLS 17-4PH Stainless Steel or Steel AISI 1045?

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; Steel AISI 1045 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate.

Part that must beDMLS 17-4PH Stainless SteelSteel AISI 1045
Stiff rod or tie (tension)6% heavierlighter
Stiff beam (bending)3% heavierlighter
Stiff panel or plate2% heavierlighter
Strong rod or tielighter1.62x heavier
Strong beamlighter38% heavier
Strong panel or platelighter27% 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 Steel AISI 1045?

Steel AISI 1045 conducts heat better: 42.5 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 12 µm/m·K for Steel AISI 1045.

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 4340Steel 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 1045
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 4340Steel 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 1045
Strength against density

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