Data Sheets

Copper and Copper Alloys   |   Brass

CW508L Tube

CommercialCZ108

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


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.

Cold Working

Cold working of CZ108/CW508L is excellent and it can be readily drawn.

Hot Working

Fabrication is rated as fair.

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.