Application Segments

Oil & Gas/CPI

Melting Route


Product Description

BÖHLER N404 is a stainless soft-martensitic Cr steel with 5% nickel with molybdenum addition.
Due to the higher alloy content, the corrosion resistance of BÖHLER N404 is higher than that of stainless steels of type 1.4313. Due to the molybdenum addition, limited use in the maritime sector is also permissible. As a result of the chemical analysis and its microstructure, BÖHLER N404 is particularly insensitive to intergranular corrosion and very resistant to fatigue and stress corrosion cracking.
To achieve the best possible corrosion resistance with BÖHLER N404, it is essential to polish the surfaces concerned. Good mechanical properties in the quenched and tempered condition. This makes this material very suitable for use in the oil and gas sector. Very good low temperature properties. Recommended temperature of use: – 60 to 350°C.
Special heat treatment to max. 23 HRC is required for sour gas enviroment in petroleum engineering.
Fittings, pumps, compressors, centrifuges, hydroelectric machines, reactor technology, shipbuilding, chemistry, petroleum technology, aviation and refrigeration technology.

Property Features

Martensitic chromium stainless steel with 5% nickel addition. Good properties at subzero temperature.

Technical Specifications

Material Numbers




Chemical Composition

Chemical composition (average %)
max. 0.06 max. 0.70 max. 1.50 max. 0.040 max. 0.030 15.0 to 17.0 0.80 to 1.50 4.0 to 6.0 min. 0.020

Available product shapes

  • Long Products
  • Open Die Forgings
  • Semi-Finished Products / Billet


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