Brasses are alloys of Copper and Zinc. They may also contain small amounts of other alloying elements to impart advantageous properties. Brasses have high corrosion resistance and high tensile strength. They are also suited to fabrication by hot forging. Free machining grades of brass set the standard for machining, by which other metals are compared.
Brasses are divided into two classes. The alpha alloys, with less than 37% zinc, and the alpha/beta alloys with 37-45% zinc. Alpha alloys are ductile and can be cold worked. Alpha/beta or duplex alloys have limited cold ductility and are harder and stronger. CZ131 / CW606N is an alpha/beta alloy.
The composition of brass alloy CZ131 / CW606N has been designed to provide a compromise between machinability, ductility and strength. Thus, it can be used in applications when machinability and riveting are required.
Applications
CZ131 / CW606N is typically used in:
Fasteners
Rivets
Domestic appliances
Automotive engineering
Hose fittings
Intricate parts such as clock components
Alloy Designations
CZ131 / CW606N corresponds to the following designations but may not be a direct equivalent:
UNS C35300
ISO CuZn37Pb2
Corrosion Resistance
Corrosion resistance is rated from fair to excellent in most environments.
Cold Working
CZ131 / CW606N has only a fair rating for cold working.
Hot Working
Hot forming of CZ131 / CW606N is poor.
Heat Treatment
Solution treatment or annealing can be done by rapid cooling after heating to 430-600°C.
Machinability
This alloy has a machinability rating of 70 when Brass CZ121/CW614N is 100.
Weldability
Soldering of CZ131 / CW606N is rated as “excellent” and brazing is “good”. Butt welding is fair but all other welding methods are not recommended.