Copper and Copper Alloys | Brass
CW508L Tube
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 hot forging. Free machining brass sets 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. CZ108 / CW508L is an alpha alloy.
CZ108/CW508L is a high purity cold forming brass. It is used when severe bending properties are required. It can be machined but only with slow speeds and very light feeds.
Applications
CZ108 / CW508L is typically used in:
Scientific Applications
Radiators
Heat Exchangers
Decorative
Chemical Composition
|
EN 12449:2012 CW508L Brass |
|
|---|---|
| Chemical Element | % Present |
| Zinc (Zn) | balance |
| Aluminium (Al) | 0.05 max |
| Iron (Fe) | 0.1 max |
| Lead (Pb) | 0.1 max |
| Others (Total) | 0.1 max |
| Tin (Sn) | 0.1 max |
| Nickel (Ni) | 0.3 max |
| Copper (Cu) | 62 - 64 |
Alloy Designations
CZ108 / CW508L corresponds to the following designations but may not be a direct equivalent:
UNS C27200
ISO CuZn37
Supplied Forms
CZ108/CW508L is typically supplied as Half Hard Tube and Half Hard Sheet
- Tube
Generic Physical Properties
| Physical Property | Value |
|---|---|
| Density | 8.44 g/cm³ |
| Melting Point | 916 °C |
| Thermal Expansion | 20.5 x10^-6 /K |
| Modulus of Elasticity | 103.4 GPa |
| Thermal Conductivity | 116 W/m.K |
Mechanical Properties
|
EN 12449:2012 Tube - Up to 5.00mm Wall Thickness |
|
|---|---|
| Mechanical Property | Value |
| Proof Stress | 320 Min MPa |
| Tensile Strength | 440 Min MPa |
| Hardness Vickers | 115 Min HV |
| Hardness Brinell | 110 Min HB |
| Elongation A | 10 Min % |
Mechanical properties listed are for material condition R440 / H115
Hot Working
Fabrication is rated as fair.
Corrosion Resistance
The corrosion resistance of CZ108/CW508L is good to excellent in most environments. It is not suited for use with acetic acid, moist ammonia or ammonia compounds, hydrochloric acid and nitric acid.
Weldability
Soldering and brazing of CZ108/CW508L are both rated as “excellent”. Oxyacetylene welding is “good” and gas shielded methods are only “fair”. Resistance flash butt-welding may also be used.
Cold Working
Cold working of CZ108/CW508L is excellent and it can be readily drawn.