About Smiths

We are a world-class supplier of engineering raw materials. Our objective is to provide all our customers, from the small machine shop to the large multi-national corporation, a supply path that continuously delivers the highest levels of service, quality and value.

EN40B Steel (722M24)

Engineering Steel

EN40B Engineering Steel

EN40B is a chromium-molybdenum nitriding steel characterised by its suitability for nitriding which promotes high wear resistance.


The material is supplied in the hardened and tempered 'T' condition, EN40B offers good toughness and good ductility. The nitriding process produces a scale free surface with minimal distortion.

Nitriding Steel

EN40B engineering steel offers high wear resistance. The alloy also offers good shock resistance and good toughness and ductility. EN40B is supplied in the hardened and tempered 'T' condition. It is classed as a nitriding steel. We also process EN40B for you in-house.

Typical Applications

Commercial applications for this engineering material include:

  • Drills
  • Guides
  • Shafts
  • Gear wheels
  • Bolts and fixings

We stock EN40B in flats and round bar.

Technical Assistance

Our knowledgeable staff and resident metallurgists will be pleased to assist you further on any technical topic. Smiths Metal Centres Limited also boasts an in-house UKAS Accredited Testing Laboratory which is unique within the multi-metal and plastic stockholding sector. We believe this underlines our total commitment to quality and our ethos of being the complete service provider.

Additional Info

A technical datasheet for EN40B is available in PDF file format. To view and download, please click here.

We offer in-house processing options - for more information, please refer to our processing services.

Read our corporate brochure by clicking here.

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