Copper and Copper Alloys - Brass - CW508L Tube

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.

CZ108 / CW508L is typically used in:
Scientific Applications
Heat Exchangers

Chemical Composition

Spec: EN 12449:2012

CW508L Brass

Chemical Element % Present
Copper (Cu) 62.00 - 64.00
Aluminium (Al) 0.0 - 0.05
Iron (Fe) 0.0 - 0.10
Lead (Pb) 0.0 - 0.10
Nickel (Ni) 0.0 - 0.30
Others (Total) 0.0 - 0.10
Tin (Sn) 0.0 - 0.10
Zinc (Zn) Balance


Physical PropertyValue
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

Spec: EN 12449:2012

Tube - Up to 5.00mm Wall Thickness

Mechanical PropertyValue
Tensile Strength 440 Min MPa
Hardness Vickers 115 Min HV
Proof Stress 320 Min MPa
Hardness Brinell 110 Min HB
Elongation A 10 Min %

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

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.


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.

Datasheet Search

Last Datasheet Revision

18 July 2019


This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.

Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed & online) and manufacturers’ data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.

Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied.

Advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. All transactions are subject to the Company’s current Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.