Brass Alloys - Brass CZ108 Properties, Fabrication and Applications

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 grades of brass set the standard for machining, by which other metals are compared.

Brass Classes

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 is an alpha alloy.

Alloy CZ108

Brass alloy CZ108 is a high purity cold forming brass. It is used when severe bending or riveting properties are required. It can be machined but only with slow speeds and very light feeds.

Chemical Composition of Brass alloy CZ108

Table 1. Typical chemical composition for brass alloy CZ108

Chemical Element

%

Cu

62.00 - 64.00

Al

0.0 - 0.05

Fe

0.0 - 0.10

Pb

0.0 - 0.10

Ni

0.0 - 0.30

Others (total)

0.0 - 0.10

Sn

0.0 - 0.10

Zn

Balance

Properties of Brass alloy CZ108

Mechanical Properties of Brass alloy CZ108

Table 2. Mechanical properties for brass alloy CZ108

Property

Sheet

Tube

Tensile Strength

300 - 550 MPa

440 Min MPa

Proof Stress

110 - 500 MPa

320 Min MPa

Elongation A50 mm

38 - 3%

10 Min %

Hardness Vickers

55 - 180 HV

115 Min HV

Hardness Brinell

- 110 Min HB

Physical Properties of Brass alloy CZ108

Table 3. Physical properties for brass alloy CZ108

Property

Value

Density

8.44 kg/m3

Melting Point

916°C

Modulus of Elasticity

103.4 GPa

Thermal Conductivity

116 W/m.K

Thermal Expansion

20.5x10-6 /°C

Alloy Designations

CZ108 corresponds to the following designations:

CEN

BS

UNS

ISO

CW508L

CZ108

C27200

CZ108 is also sometimes referred to as yellow brass.

Corrosion Resistance of Brass alloy CZ108

The corrosion resistance of Brass alloy CZ108 is excellent to good in most environments. It is not suited for use with acetic acid, moist ammonia or ammonia compounds, hydrochloric acid and nitric acid.

Fabrication of Brass alloy CZ108

Cold Working of Brass alloy CZ108

Cold working of Brass alloy CZ108 is excellent and it can be readily drawn.

Hot Working of Brass alloy CZ108

Fabrication of Brass alloy CZ108 is rated as fair.

Welding and Joining of Brass alloy CZ108

Soldering and brazing of Brass alloy CZ108 are both rated as “excellent”. Oxyacetylene welding is “good” and gas shielded methods are only “fair”. Resistance flash butt-welding may be done on rod, bar and wire.

Applications of Brass alloy CZ108

Brass alloy CZ108 is typically used in:

  • Nails
  • Chains
  • Screws
  • Scientific Applications
  • Radiators
  • Heat Exchangers

Supplied Forms

Brass alloy CZ108 is typically supplied by Aalco in the following forms:

  • Half Hard Tube
  • Half Hard Sheet

DISCLAIMER

This Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with temper, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be accepted by the Company is respect of any action taken by any third party in reliance thereon.

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.

Any 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. Any contract between the Company and a customer will be subject to the company’s 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.

This information has been sourced, reviewed and adapted from materials provided by Aalco - Ferrous and Non-Ferrous Metals Stockist.

For more information on this source, please visit Aalco - Ferrous and Non-Ferrous Metals Stockist.

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