CZ132 / CW602N - DZR Brass

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The CW602N / CZ132 dezincification resistant brass (DZR Brass) is essentially a leaded arsenical brass with a duplex structure. As its name suggests it was originally developed to provide good resistance to dezincification type corrosion which is experienced by normal hot working brasses.

As well as the improved dezincification / corrosion resistance the CW602N / CZ132 also offers good strength levels, is readily machined and easily hot forged. Its primary usage over the years has been for water fittings that are produced by hot stamping and machining.

Related Specifications

CZ132

CW602N

CuZn36Pb2As

C35330

Chemical Composition

Copper         

Rem

Lead

1.7-2.8%

Arsenic                  

0.08-0.15%

Zinc                      

35.0-37.0%

Tin

0.2% max

Iron

0.2% max

Total Impurities

0.5% max

Key Features

  • Excellent resistance to dezincification
  • Good strength and ductility
  • High general corrosion resistance
  • Ability to be machined and formed

Mechanical Properties (specification minima 18-40mm dia)

UTS

350 N/mm2

Proof Strength

-

Elongation                        

22%

Typical Physical Properties

Melting Point  

910°C

Density                                               

8.43 g/cm³

Specific Heat 

377

Thermal conductivity (20°C)

117 W/m°K

Thermal expansion coefficient (20-200°C) 

20.7 x 10-6 per °C

Electrical conductivity

26 % IACS 

Electrical Resistivity

0.066 ohm mm2/m

Modulus of Elasticity

106 KN/mm2

Fabrication Properties

Hot Working Temperature Range

800-850°C

Hot Formability

Very good

Cold Formability

Good

Machinability rating

(free cutting brass = 100)

75 %

Annealing Temp. Range

450-650°C

Stress Relieving Temp. Range                 

250-350°C

Joining Methods

Soldering

Excellent

Brazing

Good

Oxy-acetylene welding                           

Not recommended

Gas-shielded arc welding                        

Not recommended

Resistance welding                                

Not recommended

Typical Uses:

DZR Brass is typically used for hot formed and machined parts for water fittings and other fluid handling systems where mildly acidic or alkali solutions may be found, this utilises the materials de-zincification resistance.

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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