LB2 - Copper Alloys

A well-known British standard, LB2 is a continuous cast leaded tin bronze to BS1400 and has the nominal composition CuSn10Pb10, which also meets BS EN 1982-2008 CC498k. The high lead content of this class of bronze, combined with the high Tin content, increases plasticity, maximises strength and aids embeddability. The tribology of this alloy also helps prevent scouring of mating materials.

Equivalent Specifications

BS 1400 LB2
ASTM B 505 C93700
ASTM B 271 C93700
ASTM B 584 C93700
AMS 4842
AMS 4827
SAE J461
SAE 64
QQ-C-390
AS1565 C93700

Key Features

Will tolerate moderate loading, moderate to high velocity. impact loading or pounding. Needs adequate lubrication but tolerant of boundary conditions and inaccuracies of fit.

Typical Uses

Bearings for high speed and heavy loading,pumps,impellers and corrosion resistant applications.

Builders: Hardware Brackets.

Fasteners: Washers for Engines, Nuts.

Industrial: Crank Shafts, Bearings, Bearing Plates, Machine Parts, Bushings, Applications Requiring Acid Resistance to Sulphite Fluids, Parts for Steel Mill Maintenance, Slide Guides for Steel Mills, High Speed, Heavy Load Bearings, Pumps, Pressure Tight Castings, Impellers, Corrosion Resistant Castings, Bushings for High Speed and Heavy Pressure.

Marine: Large Bearings for Ships.

Description	Leaded Bronze
Nominal Composition	CuSn10Pb10
Alloy Type	cast

Typical Mechanical Properties

Tensile Strength (N/mm²)	290
Proof/Yield Strength (N/mm²)	150
Elongation (%)	15
Hardness Brinell	85
Impact Izod J20°C	8

Typical Physical Properties

Density g/cm³	9
Melting Temperature Range °C	762 - 928
Thermal Conductivity W/mK	47
Electrical Resistivity μΩ.m15°C	0.17
Coefficient of Thermal Expansion 0-250°C	19
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.