BÖHLER N404
BÖHLER N404 is a stainless, soft martensitic Cr steel with 5% nickel and molybdenum addition
with higher corrosion resistance than that of stainless steels of type 1.4313.
The molybdenum addition also permits limited use in the maritime sector.
BÖHLER N404 is particularly insensitive to intergranular corrosion and very resistant to fatigue and stress corrosion cracking and offers good mechanical properties in the quenched and tempered condition. This makes this material very suitable for use in the oil and gas sector, e.g. for fittings, pumps, compressors, centrifuges, hydropower machinery, reactor technology, shipbuilding, chemicals, petroleum technology, aviation and refrigeration technology. Very good low-temperature properties. Recommended application temperature from – 60 to 350°C.
Special heat treatment to max. 23 HRC is required for sour gas stress in petroleum technology.
In order to achieve the best possible corrosion resistance, the relevant surfaces must be polished.
Available Product Shapes
Long Products: Presented data refer exclusively to long products. Please observe the detailed explanations at the end of the data sheet (pdf).
Melting Route
Airmelted
Material Numbers
- SEL
- 1.4418
- EN
- X4CrNiMo16-5-1
Standards
- EN ISO
- 10088-3
Chemical Composition
* Chemical Composition (Average %)
- C
- max. 0.06
- Si
- max. 0.70
- Mn
- max. 1.50
- P
- max. 0.040
- S
- max. 0.030
- Cr
- 15.0 to 17.0
- Mo
- 0.80 to 1.50
- Ni
- 4.0 to 6.0
- N
- min. 0.020