Copper Alloys, Phosphor & Leaded BronzeCC492K (LG4) Bar

Leaded tin bronze alloy.

LG4 is a leaded gunmetal bronze with excellent machinability and bearing properties, good corrosion resistance and moderate strength. This alloy has a higher strength than CC490K and CC491K from the additional tin giving better wear resistance.

Leaded bronzes and gunmetals offer better machining characteristics than that of the other bronzes whilst maintaining a good balance of corrosion resistance and strength. Available in cast form only, Righton Blackburns is able to offer material supplied in many internationally recognised standards for use in applications such as bushes and bearings.

Range Enquiry

To enquire about our range or your specific requirements, please contact your local service centre.

Related Specifications

BS1400 LG4
CuSn7Pb3Zn3

Properties

Chemical Composition

Chemical Element	% Present
Copper (Cu)	85.00 - 89.00
Lead (Pb)	2.50 - 3.50
Zinc (Zn)	1.50 - 3.50
Nickel (Ni)	0.00 - 2.00
Phosphorous (P)	0.00 - 0.01
Tin (Sn)	6.00 - 8.00

Mechanical Property	Value
Elongation A50 mm	12 %
Hardness Brinell	70 HB
Tensile Strength	240 N/mm²
0.2% Proof Stress	130 N/mm²

General Physical Properties

Physical Property	Value
Density	8.8 g/cm³
Melting Point	855-1000 °C
Thermal Expansion	18 x 10^-6/K
Thermal Conductivity	61.0 W/m.K
Electrical Resistivity	0.13 x 10^-6Ω .m

Applications

Valve parts
Pump bodies
Sea water handling components
Bushes
Bearings

Characteristics

Improved mechanical properties
Better resistance to impingement and cavitation attack in contact with fast moving fluids
Good coorsion resistance
Moderate strength
Better machining characteristics than other bronzes

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Experienced multi-product specialists
In-house state of the art processing facilities
Large fleet of bespoke delivery vehicles

Disclaimer

This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon. Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed S online) and manufacturers' data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources. Material supplied by the Company may vary significantly from this data but will conform to all relevant and applicable standards. As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied. Advice given by the Company to any third party is given for that party's assistance only and without liability on the part of the Company. All transactions are subject to the Company's current Conditions of Sale. The extent of the Company's liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.