CZ114 / CW721R - High Tensile Brass
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
|
|
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 John Hood & Co.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.