CZ112 / CW712R - Naval Brass

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CW712R / CZ112 is commonly known as Naval Brass due to its improved corrosion resistance in marine environments. The general composition is 60% copper, 39% zinc with an important 1% tin addition that gives an improved corrosion resistance together with a harder and stronger duplex structure to improve the mechanical properties.

The increase in corrosion resistance enables the material to be used in both seawater and other mildly aggressive media, it also offers better strength levels than many of the basic alpha brasses combined with an excellent hot formability.

Related Specifications

CZ112

CW712R

C46400

CuZn36Sn1

Chemical Composition

Copper                  

59.5-63.5%

Tin 

1.0-1.5%

Lead

0.2-0.6%

Zinc

Rem

Key Features

  • Very good corrosion resistance in marine environments
  • Excellent hot formability
  • Good Strength
  • Retention of properties at cryogenic temperatures

Typical Physical Properties

Melting Point

915°C

Density

8.4 g/cm³

Specific Heat

380 J/Kg°K

Thermal conductivity (RT)

121 W/m°K

Thermal expansion coefficient (20-200°C)

20 x 10-6

Electrical conductivity

26% IACS 

Electrical Resistivity

0.066 ohm mm2/m

Fabrication Properties

Hot Working Temperature Range

650-750°C

Hot Formability

Excellent

Cold Formability                                   

Fair

Machinability rating

(free cutting brass = 100)

40%

Annealing Temp. Range

450-600°C

Stress Relieving Temp. Range

225-325°C

 Joining Methods

Soldering

Excellent

Brazing

Good

Oxy-acetylene welding

Good

Gas-shielded arc welding

Fair

Resistance welding:   Spot and Seam

Fair

                               Butt

Good

Typical Uses:

As its name suggests the Naval Brass CW712R / CZ112 is generally utilised in marine components including, heat exchanger tube plates, bolts, nuts, rivets, marine hardware, and fasteners for corrosion resistant service. Other uses include high strength cold-headed products and fasteners and general machined components.

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
Registered in England. Company No. 00842702