50 grades of stainless steel

The BSSA has selected 50 Grades of Stainless Steel as its theme for 2014. Each week throughout the year, we will showcase one grade and illustrate the variety of corrosion resistant, mechanical and physical properties which determine its suitability for a wide range of applications.



430F 1.4105 S43020

Anti-Lock Brake System


Anti-Lock Brake System


Solenoid Valve


Solenoid Valve


430F is used where a high level of magnetic permeability is required. This derives from its fully ferritic structure. Its high level of machinability allows volume throughput of components.

Approximate Composition – 17% Cr, 0.15% minimum S (sulphur) (Exact composition ranges vary between EN and ASTM standards).

This grade combines the following characteristics:

  • Fair pitting and crevice corrosion resistance
  • “Soft” magnetic properties. Low coercivity giving reversibly magnetic properties in electromagnetic devices
  • High magnetic permeability
  • Excellent machinability

430F is the most common stainless steel grade used for electromagnetic devices. Although its magnetic properties are not as good as the iron-silicon alloys, where corrosion resistance is required, it provides an excellent combination of properties. The processing of the grade is also important to ensure the optimum microstructure. The test certificate includes details of the magnetic properties where applicable.

Applications which illustrate these features include:

Magnetic cores, solenoid valves, relays, fuel injection systems, anti-lock braking systems, electromagnetic pumps.

Find out more about the 50 Grades of Stainless Steel campaign

BSSA Home  |  BSSA Membership  |  Contact Us

find us on facebookfollow us on twitter

Park Suite, Forsyth Enterprise Centre, Bramall Lane, Sheffield, S2 4SU
Tel: +44 (0)114 292 2636     Fax: +44 (0)114 292 2633     Email: admin@bssa.org.uk

If you are interested in learning more about our campaign please sign up here.
If you no longer wish to receive emails from us please unsubscribe here.

British Stainless Steel Association (BSSA): registered in England and Wales as a private company limited by guarantee; registration no. 07547349