SAE660

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SAE660 / CC493K offers very good machining properties and reasonable strength and hardness levels. The tin and the lead content in the material also enhances the alloys wear resistance and gives excellent anti-friction qualities.

SAE660 / CC493K is not subject to dezincification and offers a reasonable corrosion resistance in seawater and brine. This makes it suitable for pump and valve components bearings and bushings having medium loads and speeds with adequate lubrications.

Related Standards

SAE660

CC493K

C93200

CuSn7Zn4Pb7

2.1090 (RG7)

 

Chemical Composition (nominal)

Copper         

83.0%

Tin

7.0%

Lead

7.0%

Zinc

3.0%


Mechanical Properties (Minima all sizes Continuous Cast)

UTS                                          

205 N/mm2

0.2% Proof Strength                   

100 N/mm2

Elongation                                  

15%

Hardness                                   

70 HB

Key Features

  • High wear resistance
  • Excellent Machinability
  • Good pressure tightness

Typical Physical Properties

Melting Point

977°C 

Density

8.93 g/cm³

Thermal conductivity (RT)

58 W/m°K

Thermal expansion coefficient (20-200°C)

18 x 10-6 / ?C

Electrical conductivity

12% IACS

Modulus of Elasticity

100 GPa

Fabrication Properties

Hot Formability

Not Recommended

Cold Formability

Not Recommended

Machinability rating
(free cutting brass = 100)

70%

Stress Relieving Temp. Range       

260°C (1hr per inch thickness)

Maximum operating temperature             

230°C

Joining Methods

Soldering

Excellent

Brazing

Good

Oxy-acetylene welding

Not recommended

Gas-shielded arc welding                        

Not recommended

Typical Uses

SAE660 has traditionally been used as general utility bearings, bushings and wear plates and other engineering components requiring good wear resistance and machinability.

This technical information is given by Holme Dodsworth Metals without charge and the user shall employ such information at their own discretion and risk. For more detailed technical advice on temper selection, fabrication, joining, machining, physical and mechanical data please contact us as space does not permit the listing of every feature of the material.

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Holme Dodsworth Metals Limited.
59/69 Heaton Park Road.
Newcastle Upon Tyne NE6 1SQ
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