Copper Alloys, Phosphor & Leaded BronzeCC491K (LG2) Bar & Castings

Tin bronze alloy also known as red bronze or leaded gunmetal.

Known as a leaded gunmetal bronze LG2 has excellent machinability and bearing properties, good corrosion resistance and moderate strength.

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 LG2
CuSn5Zn5Pb5-C
C83600

Properties

Chemical Composition

Chemical Element	% Present
Chromium (Cr)	0.00 - 0.10
Copper (Cu)	83.00 - 87.00
Lead (Pb)	4.00 - 6.00
Zinc (Zn)	4.00 - 6.00
Nickel (Ni)	0.00 - 2.00
Phosphorous (P)	0.00 - 0.01
Tin (Sn)	4.00 - 6.00

Mechanical Property	Value
Elongation A50 mm	10 %
Hardness Brinell	65 HB
Tensile Strength	230 N/mm²
0.2% Proof Stress	110 N/mm²

Physical Property	Value
Density	8.83 g/cm³
Melting Point	1010 °C
Thermal Expansion	18 x 10^-6/K
Modulus of Elasticity	93 GPa
Thermal Conductivity	71.9 W/m.K

Applications

Architecture: Ornamental fixtures
Building: Heating & cooling equipment
Fasteners
Marine hardware
Builders hardware
Electrical hardware and switches
Industrial: Valves, bearings, pumps, gears, rings
Plumbing fixtures and pipe fittings

Characteristics

Medium strength
High resistance to impact
Superior corrosion and wear resistance
Resistance to dezincification
Good castability
Good thermal and electrical conductivity
Excellent machinability

Additional Information

Fabrication

Process	Rating
Hot Formability	Not Recommended
Cold Formability	Not Recommended
Machinability Rating (Free Machinnig Brass = 100)	85%
Stress Relieving Temp Range	260 ^oC (1hr per inch thickness)
Maximum Operating Temperature	230 ^oC

Process	Rating
Soldering	Excellent
Brazing	Good
Oxy-acetylene Welding	Not Recommended
Gas-shielded Arc Welding	Not Recommended

Find your local Service Centre

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.