CZ101 / CW501L Gilding Brass

CW501L / CZ101 is an alpha brass consisting of approximately 90% copper and 10% zinc. Also known as Gilding Metal the CW501L / CZ101 is primarily offered as a sheet grade due to its excellent cold working properties.

The make-up of CW501L / CZ101 means it is not generally susceptible to dezincification or stress corrosion and due to its formability and its attractive rich golden colour it is widely used for architectural and decorative applications. It is also readily enamelled, soldered and brazed.

CZ101  CW501L Gilding Brass

CZ101 CW501L Gilding Brass

Electrolytic Tough Pitch Copper (ETP) C101 / CW004A is a commercially pure high conductivity grade of copper refined by electrolytic deposition which is then melted and oxidised to the “tough pitch” condition with a controlled low oxygen content. This is the most widely used of all the coppers because of its combination of electrical and thermal conductivity, corrosion resistance, workability and aesthetic beauty.
C101 / CW004A is the normal grade for general electrical use as busbar, motor and transformer components, windings and many other current carrying applications. It is also very popular with architects for applications where the corrosion resistance is required for building applications. Over time the C101 will also develop the weathered
copper, green patina, appearance that offers additional corrosion resistance and a desirable look.
The use of this alloy in elevated temperature environments can be limited due to oxygen being present in the form of Cu2O. This can cause the alloy to be susceptible to hydrogen embrittlement in reducing gasses or when welding or brazing using an oxy-fuel gas flame.

Related Specifications

CW501L BS2870: CZ101
C22000 CuZn10

Chemical Composition

Copper 89.0-91.0%
Lead 0.05% max
Iron 0.10% max
Zinc Rem
Others            0.40% max


Key Features

  • Excellent cold formability
  • High resistance to stress corrosion and dezincification
  • Excellent base metal for vitreous enamelling

Typical Physical Properties

Melting Point 1045°C
Density 8.80 g/cm³
Specific Heat 376 J/Kg°K
Thermal conductivity (RT) 188 W/m°K
Thermal expansion coefficient (20-200°C) 18 x 10-6 / °C
Electrical conductivity 44 % IACS
Electrical Resistivity 0.039 ohm mm2/m

 
Fabrication Properties

Hot Working Temperature Range 750-900°C
Hot Formability Good
Cold Formability Excellent
Cold Reduction Between Anneals 90%
Machinability rating

(free cutting brass = 100)

25 %
Annealing Temp. Range 425-600°C
Stress Relieving Temp. Range 200-300°C


Joining Methods

Soldering Excellent
Brazing Excellent
Oxy-acetylene welding Good
Gas-shielded arc welding Good
Resistance welding:   Spot and Seam Not Recommended
                               Butt Good

Typical Applications

CW501L / CZ101 is most commonly utilized for architectural applications including decorative metalwork, showcase and window fittings, roofing panels, grillwork, weather-strip, cold-formed angles and channels, ornamental pressing and trim. It is also used for decorative items and jewelry including cosmetic compacts, cases, costume jewelry, emblems, medallions and other items requiring vitreous enamelling or for hardware such as, rivets, screws, wire gauzes and slide / zip fasteners.

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