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SigmaBronze 7SigmaBronze 7

SigmaBronze 7 is a leaded continuously cast copper based alloy that is suitable for a variety of applications that are under medium loads whilst using adequate lubrication. This alloy offers good sliding and dry running properties and is not subject to dezincification and has a reasonable resistance to brine making it suitable for pump and valve components. SigmaBronze 7 can be used as an alternative to SAE660 in many applications but has the advantage of being available in metric sizes.

Key Features:

SigmaBronze 7 offers excellent machining properties and good wear resistance. It is a versatile bronze which can be used in a wide variety of applications including bushes and bearings under medium load. The alloy is suitable for pump and valve applications.

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 SigmaBronze 7 Datasheet

Typical Applications:

  • General purpose bushes & bearings
  • Bearings for lifting tackle
  • Automotive fittings
  • Fuel & water pump bushings
  • Valve & slide seating rings
  • Hydraulics
  • Fittings
  • Thrust washers


SigmaBronze 7 is available for supply in bar, tube and flat bar. With more than thirty power saws within the Smiths group including a fully automated magazine feed CNC rod blanking line, we can process your material to your precise requirements. We can also economically cut from one off blanks to the largest production run for immediate or just in time deliveries.

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

Have a question or need a detailed quote?

Our staff are ready to take your call. For all supply and technical enquiries call us today
on 0845 527 3331 or click here to contact us.