BRONZE ALLOYS

 

TIN BRONZE

 

Copper tin alloys or tin bronzes are known for their corrosion resistance. Tin bronzes are stronger and more ductile than red and semi red brasses. They have high wear resistance and low friction coefficient against steel. The tin bronzes are used in bearings, gears, piston rings, valves and fittings. Lead is added to tin bronzes in order to improve machinability and pressure tightness. Lead decreases the tensile strength and ductility of the tin bronzes, but the composition can be adjusted to balance machinability and strength requirements. High leaded tin bronzes are primarily used for sleeve bearings. These alloys have a slow fail mechanism that temporarily prevents galling and seizing. The slow fail mechanism works by lead seeping out of the alloy and smearing over the surface of the journal.

 

ALLOYS

 

C90700| CuSn10|CT-1|CB480K

 

Typical Uses Bearings for Heavy Loads and Relatively Low Speeds, Gears, Gear Boxes, Restaurant Equipment, Speed Reducers, Valve Bodies, Worm Gears, Worm Wheels

 
Copper Alloys Standard Cu Sn Pb Zn Fe Ni P Al Mn Si Sb S Impurities
C90700 ASTM 88-90 10-12 0.5 0.5 0.15 0.5 0.3 0.005 - 0.005 0.2 0.05  
CuSn10 DIN 88.5-90.5 9.3-11 0.8 0.5 0.15 1.8 0.05 0.01 0.1 0.01 0.15 0.04  
CB480K EN 88.5-90.5 9.3-11 0.8 0.5 0.15 1.8 0.05 0.01 0.1 0.01 0.15 0.04  
CAC502A(PBC2) JIS 87-91 9-12 - 0.3 0.2 0.5 0.1 0.005 - 0.005 0.05 -  
CT-1 BS:1400 Rem. 9-11 0.25 0.05 - 0.25 0.15 - - - - - 0.8
 
 

C90800| CuSn12|CT-2|CB483K

 

Typical Uses Worm wheels, worm gears, bushings for heavy loads and low speeds, speed reducer.

 
Copper Alloys Standard Cu Sn Pb Zn Fe Ni P Al Mn Si Sb S Impurities
C90800 ASTM 85-89 11-13 0.25 0.25 0.15 0.5 0.3 0.005 - 0.005 0.2 0.05 -
GbCuSn12 DIN 86-88 11.3-13 0.8 0.5 0.15 1.8 0.05 0.01 0.1 0.01 0.15 0.04 -
CB483K EN 85.5-88.5 11.2-13 0.6 0.4 0.15 2 0.2 0.01 0.2 0.01 0.15 0.05 -
CAC503A (PBC3B) JIS 84-88 12-15 - 0.3 0.2 0.5 0.1 0.005 - 0.005 0.05 - -
CT-2 BS:1400 85-87.3 11.2-13 0.2 0.4 0.15 1.5-2 0.05 0.01 0.2 0.01 0.1 0.05 0.8
 
 

C92200|LG-4|Class-2

 

Typical Uses Cryogenic Valves, Valves for Water Meters, Medium Pressure Hydraulic Equipment, Valve Components, Pumps Used to 550 F, Pump Impellers, Fittings Used to 550 F, Gears, Piston Rings, Bushings, Bearings, Medium Pressure Steam Equipmen up to 550 Ft, Ornamental Castings, Heating Equipment, Cooling Equipment, Nuts.

 
Copper Alloys Standard Cu Sn Pb Zn Fe Ni P Al Mn Si Sb S Bi Imp
C92200 ASTM 86-90 5.5-6.5 1-2 3-5 0.25 1 0.05 0.005 - 0.005 0.25 0.05 - -
G-CuSn6ZnNi DIN 83.5-87 5.8-7 2.5-4 1.5-3 0.2 1.5-2.5 0.03 0.01 0.1 0.01 0.3 0.06 - -
CB498K EN 86-89.5 5.7-6.5 1.2-2 3.2-5 0.25 1 0.03 0.01 - 0.01 0.25 0.08 - -
CAC407 (BC7) JIS 86-90 5-7 1-3 3-5 0.2 0.8 0.03 0.005 - 0.005 0.2 - - -
LG-4 BS:1400 Rem. 6-8.05 2.5-3.5 1.5-3 0.2 2 - 0.01 - 0.01 0.25 - 0.05 0.7
Class-2 IS:1458-1965 Rem. 5-7 1-3 2-3 0.3 - 0.05 0.01 - - 0.1 - - 0.6
LTB-1 IS:318-1981 Rem. 6-8 2.5-3.5 1.5-3 0.3 2 - 0.01 - 0.01 0.3 0.7 - -
 
 

C90500|G-1 |BC-3

 

Typical Uses Bearings, Bushings, Clamps, Piston Rings, Pump Bodies, Valves, Seal Rings, Worm Gears, Expansion Bearings, Pump Impellers, Valve Bodies, Gears, Gear Blanks, Finishing Dies for Wood Pulp Industry, Heavy Construction Equipment, Connectors, Nuts, Water Conditioners, Steam Fittings

 
Copper Alloys Standard Cu Sn Pb Zn Fe Ni P Al Mn Si Sb S Bi Impurities
C90500 ASTM 86-89 9-11 0.3 1-3 0.2 1 0.05 0.005 - 0.005 0.2 0.05 - -
CAC403 (BC3) JIS 86.5-89.5 9.0-11.0 1.0 1.0-3.0 0.2 0.8 0.03 0.005 - 0.005 0.2 - - -
G 1(88/10/2) BS:1400 Rem. 9.5-10.5 1.5 1.75-2.75 0.15 1 - 0.01 - 0.02 0.2 - 0.03 0.5
 
 

C90300|BC-2

 

Typical Uses Valves, Potable Water Applications, Gears, Pump Components, Bearings, Bushings, Pump Impellers, Piston Rings, Valve Components, Seal Rings, Steam Fittings, Trunnion Bearings, Wrist-Pin Bushings, Piston-Pin Bushings, Machine Tool Bushings, Roll-Mill Bearings, and Bridge Bearings, Marine Fittings, Plumbing Fixtures

 
Copper Alloys Standard Cu Sn Pb Zn Fe Ni P Al Mn Si Sb S Bi
C90300 ASTM 86-89 7.5-9 0.3 3-5 0.2 1 0.05 0.005 - 0.005 0.2 0.05 -
CAC402 (BC2) JIS 86.0-90.0 7.0-9.0 1.0 3.0-5.0 0.2 0.8 0.03 0.005 - 0.005 0.2 - -
 
 
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