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SigmaBronze 12SigmaBronze 12

SigmaBronze 12 is a continuously cast copper based alloy containing 10.5 - 13% tin. This alloy combines high mechanical strength and hardness with good ductility, corrosion resistance and wear resistance. SigmaBronze 12 can be used as an alternative to PB1 or PB2 in many applications but has the advantage of a higher tin content that will give a degree of self-lubrication as well as being available in a range of metric sizes.

Key Features:

SigmaBronze 12 offers high mechanical and fatigue strength with excellent corrosion resistance in seawater. The alloy has increased tin content which gives the material a degree of self-lubrication. With good resistance to impact loading and high wear resistance, SigmaBronze 12 provides good machinability and is weldable and brazable.

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 12 Datasheet

Typical Applications:

  • Pump & valve components
  • Marine Ultrasonics
  • Worms & Gears under high working loads
  • Excavation & Cranes
  • Bearings & bushes
  • Hydraulics
  • Linear bearings
  • Flanges
  • Product Description


SigmaBronze 12 is available for supply in bar, tube and flat bar. There are thirty power saws within the Smiths group including a fully automated magazine feed CNC rod blanking line. We can 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?

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on 0845 527 3331 or click here to contact us.