METAL SOLUTIONS

EOS NickelAlloy IN738

Material Data Sheet

EOS NickelAlloy IN738

Superalloy for use in high-stress and high-temperature applications

EOS NickelAlloy IN738 is a high strength nickel-base superalloy for use in high stress and high temperature applications. The composition of the powder has been modified to improve AM processability without compromising the superior strength and creep performance of the alloy. EOS NickelAlloy IN738 is suitable for use in high temperature structural components for various kinds of turbomachinery.

MAIN CHARACTERISTICS

  • High strength at high temperatures
  • Excellent creep resistance
  • Excellent oxidation resistance

Download Process Data Sheet (PDF)

TYPICAL APPLICATIONS

  • Gas turbine components
  • Rocket engine turbo pumps
  • Marine and automotive turbochargers

The EOS Quality Triangle

EOS uses an approach that is unique in the AM industry, taking each of the three central technical elements of the production process into account: the system, the material and the process. The data resulting from each combination is assigned a Technology Readiness Level (TRL) which makes the expected performance and production capability of the solution transparent.

EOS incorporates these TRLs into the following two categories:
 
  • Premium products (TRL 7-9): offer highly validated data, proven capability and reproducible part properties. 
  • Core products (TRL 3 and 5): enable early customer access to newest technology still under development and are therefore less mature with less data.

All of the data stated in this material data sheet is produced according to EOS Quality Management System and international standards
EOS 3D Printing Solutions Quality Triangle

POWDER PROPERTIES

Powder and built part compositions are based on AMS 5410C.

Powder Particle Size

GENERIC PARTICLE SIZE DISTRIBUTION 20 - 63 μm

SEM micrograph of EOS NickelAlloy IN738 powder

HEAT TREATMENT

Description

EOS NickelAlloy IN738 is susceptible to formation of macrocracks upon heat treatment, dependant on part geometry. Following are recommendations to mitigate the risk of macrocrack formation: (1) shot peening of parts prior to heat treatment; (2) a combined stress relieve and solution treatment plus HIP treatment using pre-pressurization. Detailed information on the heat treatment can be found in application note.

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