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DMLS 17-4PH Stainless Steel vs. Titanium Ti-6Al-4V

Compare DMLS 17-4PH Stainless Steel vs. Titanium Ti-6Al-4V strength, stiffness, weight and thermal properties.

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DMLS 17-4PH Stainless Steel3D printed metal (DMLS)
Titanium Ti-6Al-4VWrought
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Mechanical
Yield strength861MPasourcemean, as built, horizontal (N=72)885MPasourcetypical, plate (>0.187 in), annealed, 0.2% offset
Ultimate tensile strength886MPasourcemean, as built, horizontal (N=72)940MPasourcetypical, plate, annealed
Elongation at break19.9%sourcemean at break, as built, horizontal16%sourcetypical, in 2 in., plate annealed
Young's modulus (stiffness)197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs)107–122GPasourcetypical range, 20 °C
Density7,790kg/m³sourcemean part density (ISO 3369)4,430kg/m³sourcenominal
Strength to weight110kN·m/kg200kN·m/kg1.81x higher
Stiffness to weight25.3MN·m/kg25.8MN·m/kg2% higher
Poisson's ratio0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs)0.342sourcemean of TIMET measurements
Shear modulus77.4GPa1.82x stiffer in shear42.7GPa
Bulk modulus144GPa121GPa
Speed of sound5,029m/s5,084m/s
Thermal
Thermal conductivity17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs)6.6W/m·Ksourcetypical, 20 °C, mill annealed
Thermal expansion10.4µm/m·Ksourcemean 25-100 °C, ASTM E228, AFTER atmospheric heat treatment (as-built value not published)9µm/m·Ksourcetypical, mean 0-100 °C
100 mm part over a 50 °C swing52µm growth45µm growth16% less
Specific heat460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs)580J/kg·Ksourcetypical, 20 °C
Heats up and cools (diffusivity)5mm²/s1.94x faster2.57mm²/s
Thermal shock resistance5,474W/m47% more resistant3,730W/m
Melting pointnot sourced1,630–1,650°Csourcemelting range
Max service temperaturenot sourced400°Csourceupper recommended use temperature
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 E8MTIMETAL 6-4 (Ti-6Al-4V Grade 5) annealed plate typical (TIMET properties manual) + TIMET datasheet TMC-0150 physical properties

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 Titanium Ti-6Al-4V?

Titanium Ti-6Al-4V is stronger: its yield strength is 885 MPa against 861 MPa for DMLS 17-4PH Stainless Steel (3%).

Which is lighter, DMLS 17-4PH Stainless Steel or Titanium Ti-6Al-4V?

Titanium Ti-6Al-4V is lighter: 4,430 kg/m³ against 7,790 kg/m³ for DMLS 17-4PH Stainless Steel.

Which is stiffer, DMLS 17-4PH Stainless Steel or Titanium Ti-6Al-4V?

DMLS 17-4PH Stainless Steel is stiffer: Young's modulus 197 GPa against 115 GPa for Titanium Ti-6Al-4V, 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 Titanium Ti-6Al-4V?

For the same stiffness or strength: Titanium Ti-6Al-4V 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 SteelTitanium Ti-6Al-4V
Stiff rod or tie (tension)2% heavierlighter
Stiff beam (bending)34% heavierlighter
Stiff panel or plate47% heavierlighter
Strong rod or tie1.81x heavierlighter
Strong beam1.79x heavierlighter
Strong panel or plate1.78x 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 Titanium Ti-6Al-4V?

DMLS 17-4PH Stainless Steel conducts heat better: 17.9 W/m·K against 6.6 W/m·K for Titanium Ti-6Al-4V.

Which expands less with temperature?

Titanium Ti-6Al-4V expands less: 9 µm/m·K against 10.4 µm/m·K for DMLS 17-4PH Stainless Steel.

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-T7451Brass 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 SteelTitanium Ti-6Al-4V
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-T7451Brass 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 SteelTitanium Ti-6Al-4V
Strength against density

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