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CZ121 (CW614N) Brass AlloyCZ121 (CW614N) Free Machining Brass Alloy

CZ121 offers the highest possible machinability of any copper alloy.

This alloy is a free machining brass with a 3% lead content - this addition of lead is finely dispersed throughout the materials microstructure which acts as both a lubricant and chip breaker. This results in giving the alloy its free machining characteristics. With a machinability rating of 100%, CZ121 is the standard by which all other copper based alloys are rated. The alloy also offers good corrosion resistance and strength.

Key Features:

CZ121 offers good corrosion resistance and good strength. The alloy promotes excellent hot formability with the highest machinability of any copper alloy.

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 CZ121 (CW614N) Brass Alloy Datasheet

Typical Applications:

  • All types of machined components
  • Fasteners
  • Extruded sections
  • Window frames
  • Plug pins
  • Switch blocks


We offer CZ121 brass alloy in bar, hexagon, flat bar, square bar and hollow bar. We offer processing services at our Head office and 14 service centres across the Group. With more than 30 band saws and a fully automated magazine feed CNC rod blanking line, we can process your material to your specific requirements.

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To find out more about Smiths Metal Centres extensive range of high quality brass 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.