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 Steel Bar

S140 Aerospace Steel Bar

BS S140 aerospace steel bar is a 2½% Nickel-Chromium-Molybdenum steel alloy with a tensile strength(Rm) of 1080-1280 N/mm².

High Tensile & Yield Stress

The alloy is supplied as a bright steel product and offers high tensile and yield stress. With good notch toughness and creep resistance, the alloy can be used in elevated temperature service. It is classed as an alloy structural steel product and is used in the fabrication of parts in the aerospace, motorsport, Oil & Gas and automotive sectors among others, although it finds many uses in general engineering.


BS S140 aerospace steel bar is supplied as bright steel and has varied general engineering use. It is a high tensile and high yield steel product with 2½% nickel-chromium-molybdenum.

Typical Applications

Commercial applications for this engineering material include:

  • Fasteners
  • Mechanical parts
  • Connecting rods
  • Shafts and gears
  • Boiler support rods
  • Bolts and nuts

We stock S140 in 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 S140 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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