Key features:

Excellent machinability; widely used in the pump industry for bowl and lineshaft bearings.

Full alloy description:

A.W. Fraser Alloy LG1 is a general purpose leaded gunmetal conforming to the requirements of B.S. 1400 - 1985 alloy LG1.

LG1 has excellent machining properties, and is not subject to dezincification (Category I alloy).

It has reasonable corrosion resistance to seawater and brine, making it suitable for plumbing supplies, pump and low pressure valve components.

The composition of A.W. Fraser alloy LG1 is strictly controlled as are the casting conditions.

LG1 products are manufactured using the latest continuous and centrifugal casting technology.
Machinability Rating: 90
SAE Grade: 40/5A

Comparable specifications:

AS1565 83810A; ASTM B505, B271 - 84400 *

* Similar but not identical;

Download tech sheet:

For a full alloy summary, including Chemical Composition and Mechanical Properties, please download our tech sheet in PDF format below...


  • C84400
  • LG1 / CuSn3Pb5Zn8
  • CC490K / CuSn3Zn8Pb5
  • 2.1098 / CuSn2ZnPb*
  • CAC401 (BC1)*
  • CuSn3Zn8Pb5*
* = similar specification


The alloy information provided on this page is indicative and must not be taken as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with product specification.

The information contained on this page is based on our present knowledge and is given in good faith as a precursor to discussing your specific requirements with us.

No liability will be accepted by AW Fraser in respect of any action taken by any third party in relying on the data on this page.
Enquire about Alloy LG1
AW Fraser has the capability to modify alloys for improved performance.

To discuss your specific requirements, please contact our technical team on the telephone number below, or e-mail us via the enquiry form:
  • +64 3 341 0027
Alloy enquiry form
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Reasons to choose AW Fraser:

  • AW Fraser exports to all corners of the globe, maintaining a competitive edge in the global marketplace through a commitment to quality engineering and manufacturing.
  • AW Fraser maintains its own laboratory with the latest equipment and can supply reports for all production on request. Read more
  • AW Fraser is accredited to ISO 9001 and ISO 14001, delivering independently accredited quality. Read more
  • AW Fraser has received multiple Supplier Awards from a Fortune 500 company for machined components.

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