Bronze Alloys from Thames Stockholders




SigmaBronze 7 is a viable alternative to SAE660 in many applications because it has the advantage of being available in metric sizes. Like SAE660, the alloy is a leaded continuously cast copper-based alloy suitable for applications under medium load whilst using adequate lubrication. Offering good sliding and dry running characteristics, SigmaBronze 7 is not subject to dezincification. It is suitable for use in applications such as pump and valve manufacture since it has reasonable resistance to brine.

SigmaBronze 7 also benefits from excellent machinability.

Typical commercial applications for SigmaBronze 7 bronze alloy include:

  • Automotive fittings
  • Fuel & water pump bushes, pump/valve components
  • Hydraulics, bearings for lifting tackle, thrust washers


  • Good wear resistnace
  • Excellent machining characteristics
  • Excellent anti-friction qualities
  • Versatile and broad range of uses
  • Available in metric sizes

We stock SigmaBronze 7 bronze alloy in bar, tube & flat bar. We welcome stock enquiries from both domestic and international customers.

  Get in touch...

Thames Stockholders is one of the UK's leading suppliers of bronze alloy products. To discover more about our products and to receive a competitive quotation, please call us today on +44 (0)20 8805 3282 or click here to contact us.