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BS S143 Stainless Steel BarBS S143

Stainless Steel Bar

This aerospace grade precipitation hardening stainless steel combines high mechanical strength with moderate to good corrosion resistance in a variety of media.

The steel is melted in air by an electric process. BS S143 is similar in a number of respects to 17/4 PH stainless steel (UNS S17400 / AISI 630) in its combination of properties. BS S143 stainless steel is supplied in the fully heat treated condition (solution heat treated followed by a two stage precipitation hardening treatment) as bright bar (BS S143D), black bar (BS S143B) and forgings (BS S143C).

Material to BS S144 and BS S145 shares a common chemical composition with BS S143. Therefore material to BS S143 can be precipitation hardened using a different sequence of temperatures to produce material meeting the mechanical property requirements of BS S144 or BS S145.

Key Features:

S143 Aerospace Stainless Steel Bar provides useful corrosion resistance in mildly/moderate corrosion environments and is similar to that of basic 300 series stainless steels. The machining and welding of this grade of stainless steel presents no particular problems

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.

Download BS S143 Aerospace Stainless Steel Bar Datasheet

Typical Applications:

  • Mechanical components in Aerospace and Defence
  • High-Tech mechanical applications

We offer BS S143 Aerospace Stainless Steel in bar.


Our processing department within the Smith's Group utilises thirty power saws including fully automated magazine feed CNC rod blanking lines. We can economically cut your material regardless of the volume required.

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To find out more about Smiths Metal Centres extensive range of high quality aerospace stainless steel bar products, click on one of our products on the side menu of this web page.

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