Lead Bronze  

British Standard : LB1  
Indian Standard : 
Nominal Composition : 76/9/0/15 
Tensile Strength (kg/mm2) : 17-23 
Elongation % on 2" : 4-10 
Brinell Hardness : 50-70 
Typical Uses : Bearings in mining machinery in corrosive water conditions and for unlined bearings under poor lubrication conditions 

British Standard : LB2  
Indian Standard : LTB 5 
Nominal Composition : 80/10/0/10 
Tensile Strength (kg/mm2) : 18/26 
Elongation % on 2" : 5-15 
Brinell Hardness : 55-85 
Typical Uses : Mill bearings, railway bearings and bearings for the oil industry 

British Standard : LB3  
Indian Standard : 
Nominal Composition : 85/10/0/5 
Tensile Strength (kg/mm2) : 18-26 
Elongation % on 2" : 5-12 
Brinell Hardness : 70-85 
Typical Uses : Bushes for chill cast, centrifugally cast and continuously cast. 

British Standard : LB4  
Indian Standard : LTB 3 
Nominal Composition : 85/5/0/10 
Tensile Strength (kg/mm2) : 15-18 
Elongation % on 2" : 8-12 
Brinell Hardness : 55-75 
Typical Uses : Mill bearings, railway bearings and bearings for the oil industry 

British Standard : LB5  
Indian Standard : LTB 6 
Nominal Composition : 75/5/0/20 
Tensile Strength (kg/mm2) : 15-18 
Elongation % on 2" : 6-10 
Brinell Hardness : 45-65 
Typical Uses : Linings for steel backed motors and aero engine bearings for use at higher temperatures than white metal linings 
 

Name
Lead Bronze
BS
LB1
LB2
LB4
LB5
Element Min Max Min Max Max Min Max
 
%
%
%
%
%
%
%
Copper Rem - Rem - - Rem -
Tin 8.00 10.00 9.20 11.00 6.00 4.00 6.00
Zinc - 1.00 - 1.00 2.00 - 1.00
Lead 13.50 16.50 9.00 10.50 10.00 19.00 23.00
Phosphorous - 0.10 - 0.05 0.05 - 0.10
Nickel - 2.00 - 2.00 2.00 - 2.00
Iron - - - 0.15 0.15 - 0.15
Aluminium - - - 0.01 0.01 - 0.01
Maganese - - - 0.20 0.20 - 0.20
Antimony - 0.50 - 0.50 0.50 - 0.50
Iron+Arsenic - - - - - - -
Antimony - - - - - - -
Silicon - - - 0.02 0.02 - 0.01
Bismuth - - - - - - -
Maganesium - - - - - - -
Sulphur Nicbium - 0.10 - 0.10 0.10 - 0.10
Impurities - 0.30 - 0.50 0.50 - 0.30
 
 
 
 
 
Manufacturer and Exporter of Copper Alloy Ingots
 
 
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