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.


Tool Steel

P20 Tool Steel

P20 a versatile steel commonly used in the production of large mould frames & bolsters.


Characterised by good toughness at moderate strength levels, P20 tool steel is a highly versatile engineering material. The alloy is a pre-hardened plastic mould steel and provides unified hardness across wide sections. Typical applications for the alloy include tooling, die casting dies for zinc and machine cut plastic moulds. The inclusion of nickel and chromium during the alloying process enhances the hardness and toughness of the product.


The product benefits from good weldability and offers an excellent polished finish. To achieve maximum surface hardness required in applications such as compression moulding plastic dies, case hardening or nitriding is an option. We also process your material in-house across all 14 service centre sites and our bulk warehouse facility in Biggleswade.

Typical Applications

Commercial applications for this engineering material include:

  • Bolsters
  • Injection moulds
  • Deep set mould tools
  • Die holders
  • Casting dies

We stock P20 (1.2311) in round bar, plate and sheet.

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 P20 (1.2311) 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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