High-nitrogen steels

High-nitrogen steels

High-nitrogen steels (HNS), as Cronidur® 30 developed by Energietechnik Essen GmbH, incorporate unique properties that make them suitable for extremely demanding and safety-critical applications. A wide range of components, including tools, ball bearings, spindles, seamless rings, connecting elements and fixings, for example, and also specialist products, such as medical instruments and implants, plastics moulds, and food process engineering, are made in high-nitrogen steels.

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A steel is considered high-nitrogen if it contains more nitrogen than can be retained in the material by processing at atmospheric pressure. CRONIDUR® 30, one of our high-nitrogen steel grades, is used in aerospace engineering, for example, where it constantly proves its extraordinary in-service performance. Our nickel-free alloy P2000 delivers ultra-high resistance to corrosion and excellent mechanical properties.

Production process

High-nitrogen steel (HNS) is produced using the PESR process, i.e. electroslag remelting under elevated pressure. We process and form our HNS-grade semis in hot-rolling mills, forging presses and on cold-upsetting machines.


'Our high-nitrogen steels (HNS) feature excellent properties, such as ultra-high strength and hardness combined with good toughness, high corrosion-resistance, high-temperature strength, austenite expansion/stabilization, excellent grindability and polishability, superior wear-resistance and high oxide cleanness levels.

  • Customised production
  • PESR
  • Supplied to specifications (SAE AMS 5898, ASTM F 899, UNS S42027)

Our supply range

Cronidur® 30 + HNS 40 HC

Martensitic steel (material number 1.4108 –1.4123).


Steel bars Request quotation
Sheet Request quotation
Tailored blanks Request quotation
Wire rod Request quotation
Rings Request quotation
Customized products Request quotation

Austenitic grades

Austenitic steels nitrogen-alloyed at high pressure.


Material Material number Material designation  
Steel bars P 900 N 1.3815 X 8 MnCrN 19 19 Request quotation
Steel bars P 900 N + Mo 1.4456 X 8 CrMnMoN 18 18 2 Request quotation
Steel bars P2000 1.4452 X 13 CrMnMoN 18 Request quotation
Wire rod P2000 1.4452 X 13 CrMnMoN 18 Request quotation
Steel bars P 4472 1.4472 X 4 CrNiMnMo 21 9 4 Request quotation
Customized products       Request quotation

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Jörg Schulze

Sales Director Retaining Rings & HNS