CZ115 / CW722R - High Tensile Brass

Contact your nearest branch today for a quote...

CZ115 / CW722R consists of of a duplex structure and is a high tensile brass with a restricted aluminium content, enabling it to be soldered and brazed. Similar in composition to the CW721 / CZ114 (aluminium content aside) this grade it was developed to allow high strength brass components to be joined. Sometimes referred to as a manganese bronze the CW722R / CZ115 has additions of iron, tin and manganese that benefit the physical and mechanical attributes of the alloy.

The tin and iron additions impart higher strength levels, while the tin also improves the corrosion resistance. The CW722R / CW115 also offers good fabrication properties with a very good machinability rating, ease of hot forging and the ability to lend itself to finish plating.

Related Specifications

CZ115

CuZn39AlFeMn

CW722R

 

Chemical Composition

Copper                  

56.5-58.5%

Tin              

0.2-0.8%

Lead            

0.5-1.5%

Iron             

0.3-1.0%

Aluminium     

0.1% max

Manganese   

0.5-2.0%

Zinc             

Rem

Others         

0.5% max

Mechanical Properties (Specification minima 18-80mm)          

Tensile Strength

440N/mm2

0.2% Proof Strength                     

 

210N/mm2

Elongation √5.65               

 

15%

Key Features

  • Enhanced Strength Levels
  • Good corrosion resistance
  • Suitable for brazing and soldering
  • Excellent hot forming properties
  • Very Good machinability rating
  • Non-sparking

Typical Physical Properties

Melting Point

940°C 

Density

8.42 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

18% IACS 

Electrical Resistivity

0.082 ohm mm2/m

 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

Very Good

Brazing

Very Good

Oxy-acetylene welding

Not Recommended

Gas-shielded arc welding

Not Recommended

Resistance welding:   Spot and Seam       

Not Recommended

          Butt                                          

Fair

 
Typical Uses:

Due to the enhanced mechanical properties and joining properties of CW722R / CZ115 it is utilised 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.

Contact your nearest branch today for a quote...

Translate  
International enquiries has a new dedicated email export@holmedodsworth.com:    •   Our Luton branch is now ISO Certified!: , Date: 20 Sep 2017   •   USD: 1.2930, EURO: 1.08645   •   Copper: 5304, Brass: 6250
Holme Dodsworth Metals Limited.
59/69 Heaton Park Road.
Newcastle Upon Tyne NE6 1SQ
Registered in England. Company No. 00842702