CZ114 / CW721R - High Tensile Brass

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CW721R / CZ114 is a high tensile brass consisting of a duplex structure. Developed for more exacting applications where strength and corrosion resistance are required. Also referred to as a manganese bronze the CW721R / CZ114 has additions of aluminium, iron, tin and manganese that are added to the basic 60/40 brass matrix, creating a variety of properties to benefit the designer.

The aluminium and tin content gives the CW721R / CZ114 a brighter finish and is the main reason for the increase in corrosion resistance. The iron and manganese additions also improve the strength level, with the iron also acting a grain refiner. Some of the other benefits of the CW721R / CZ114 grade are a very good hot working capacity to allow for hot stamping and a good machinability rating.

Related Specifications

CZ114

CuZn39AlFeMn

CW721R

 

Chemical Composition

Copper         

56.5-58.5%

Tin              

0.2-0.8%

Lead            

0.5-1.5%

Iron             

0.3-1.0%

Aluminium     

1.5% max

Manganese   

0.5-2.0%

Zinc             

Rem


Key Features

  • Enhanced Strength Levels
  • Excellent hot forming properties
  • Good Corrosion resistance
  • High machinability rating
  • Non-sparking

Typical Physical Properties

Melting Point

910°C 

Density

8.36 g/cm³

Specific Heat                                       

380 J/Kg°K

Thermal conductivity (RT)

88 W/m°K

Thermal expansion coefficient (20-200°C) 

20 x 10-6

Electrical conductivity                            

21% IACS 

Electrical Resistivity

0.082 ohm mm2/m

Magnetic Permeability

1.07

Young’s Modulus

97 x 103 N/mm2

Fabrication Properties

Hot Working Temperature Range

700-750°C

Hot Formability

Very Good

Cold Formability

Poor

Machinability rating

(free cutting brass = 100)

75%

Annealing Temp. Range

425-600°C

Stress Relieving Temp. Range

225-350°C

Joining Methods

Soldering

 

 

             Joining can be restricted

 


             due to the Al content.

Brazing

Oxy-acetylene welding

Gas-shielded arc welding

Resistance welding:   Spot and Seam

                               Butt

Typical Uses:

Due to the enhanced properties of CW721R / CZ114 brass it is commonly used in gas valves and fittings, fasteners, pump trim, gears, locks, heavy-duty electrical connectors, transmission components, marine hardware, safety tools and decorative metalwork.

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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