CZ112 / CW712R - Naval Brass
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 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.