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Maragin Steel MS1

Product information

EOS MaragingSteel MS1 is a martensite-hardenable steel. Its chemical composition corresponds to US classification 18% Ni Maraging 300, European 1.2709 and German X3NiCoMoTi 18-9-5. This kind of steel is characterized by having excellent strength combined with high toughness. The parts are easily machinable after the building process and can be easily post-hardened to more then 50 HRC. They also have excellent polishability.



  • easily machinable

  • age hardenable up to approx. 54 HRC

  • good thermal conductivity



  • Series-production parts

  • Tooling (e.g. aluminium die casting)

  • Meachanical Engineering

  • Aerospace

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