301LN is an austenitic stainless steel with a high work hardening rate. Nitrogen is used to provide increased strength.
Approximate Composition - 17.0% Cr, 0.030% C, 7.0% Ni, 0.12% N (Exact composition ranges vary between EN and ASTM standards).
This grade combines the following characteristics:
- Corrosion resistance similar to 304
- Higher minimum 0.2% PS proof stress compared to 304 – 350 MPa
- Work hardening allows minimum UTS of 1150 MPa defined in EN 10088-2
- Good toughness
- Higher strength and work hardening requires larger forces in forming
- Greater springback than 304
The dominant use of this high strength austenitic grade is in railway carriages. The high strength allows the use of thinner sections and therefore lower weight which in turn gives more economical running costs. The high toughness offers excellent crash resistance.
Rail carriages, springs, airframe sections, wiper blades, automotive wheel covers.