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.


Aerospace Stainless Steel Bar

S145 Aerospace Stainless Steel Bar

S145D is a precipitation hardening stainless steel with high strength and moderate to good corrosion resistance.

Even greater Tensile Strength

The alloy is identical in chemical composition to both BS S143 and also BS S144, but has a higher tensile strength which is achieved through heat-treatment.


BS S145 Aerospace Stainless Steel Bar can be supplied solution treated, or solution treated and precipitated. Due to the added heat treatment, the alloy has an even greater tensile strength when compared with S143 and S144. The alloy offers moderate to good corrosion resistance.

Typical Applications

Commercial applications for this engineering material include:

  • Aerospace components
  • Military components
  • High technology applications
  • Automotive components
  • Industrial bearings
  • Precision parts

We stock S145 in flats, round bar, square bar and hexagon 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 S145 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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