LPB1 - Copper Alloys

This alloy is classified as leaded phosphorus bronze and conforms to BS 1400 LPB1 CuSn7PbP and contains 2.0-3.8% lead which gives excellent machinability. The alloy can be used for bearing applications for hard or moderately hard shafts, with low to moderate rotation speeds and can tolerate less lubrication and poorer alignment than the non leaded tin bronzes such as PB1 and PB2.

Equivalent Specifications

BS 1400 LPB1
BS EN 1982-2008 GC CC492K
CuSn7Zn2Pb3-C
Def Stan 02 830 Part 1
NES 830 Part 2
AS 1565-1985 C93100
AS 1565-1974 931D

Key Features

Good strength combined with low friction properties and good general corrosion resistance.

Typical Uses

Gears, bearings, bushings, wear / slide plates, worm wheels with moderately hard shafts, requiring moderately high loads, moderate to low speeds with less adequate lubrication and alignment than phosphor bronze.

Description	Leaded Bronze
Nominal Composition	CuSn5Pb9
Alloy Type	cast

Typical Mechanical Properties

Tensile Strength (N/mm²)	290
Proof/Yield Strength (N/mm²)	150
Elongation (%)	15
Hardness Brinell	90
Impact Izod J20°C

Typical Physical Properties

Density g/cm³	8.8
Melting Temperature Range °C	850 - 1000
Thermal Conductivity W/mK	47
Electrical Resistivity μΩ.m15°C	16
Coefficient of Thermal Expansion 0-250°C	18
Relative Magnetic Permeability
Coefficient of Friction

Copper Alloys has the ability to modify existing alloys for improved performance. Many customers have benefited from this in the past.

To discuss your requirements, call a member of Copper Alloys’s technical team on +44 (0) 1782-816888, or email [email protected].

This Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with tempeter, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.

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.

Any 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. Any contract between the Company and a customer will be subject to the Company’s 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.