C101 / CW004A / ETP Copper - Holme Dodsworth Metals Ltd

C101 / CW004A / ETP Copper

C101 (CW004A)

C101 (CW004A): Often referred to as HDHC (Hard Drawn, High Conductivity) copper, is recognized for its exceptional electrical conductivity and mechanical strength.

This alloy's outstanding combination of conductivity and durability makes it a prime choice for various electrical and electronic applications, including wiring, busbars, and connectors.

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.

Chemical Composition

Copper	99.90 min
Oxygen	0.005 – 0.040
Total Imps	0.03% max (excl. O2 & Ag)

Related Specifications

C101	CW004A
BS1433	C11000 ETP
Cu-ETP	DIN 2.0060

Key Features

• Very High Electrical Conductivity
• Excellent formability
• Very Good Thermal Conductivity
• Excellent Joining Characteristics

Typical Physical Properties

Melting Point	1083°C
Density	8.92 g/cm³
Specific heat	385 J/Kg °K
Thermal conductivity	393 W/m°K
Thermal expansion coefficient(20-200°C)	17.3 x 10-6 Per °C
Electrical conductivity	100 % IACS
Electrical Resistivity	0.0172 x10-6microhm /m
Modulus of elasticity	118000 N/mm²

Fabrication Properties

Hot Working Temperature Range	750-950°C
Hot Formability	Good
Cold Formability	Excellent
Cold reduction between anneals	90% max
Machinability rating (free cutting brass = 100)	20%
Annealing Temp. Range	200-650°C
Stress Relieving Temp. Range	150-200°C

Joining Methods

Soldering	Excellent
Brazing	Good
Oxy-acetylene welding	Less Suitable
Gas-shielded arc welding	Fair
Resistance welding: spot and seambutt	Not Recomended Good

Typical Uses:

The C101 / CW004A is mostly utilised for general electrical busbar, motor and transformer components, windings, electrical conductors, contacts, terminals and many other current carrying applications. Other uses include architectural metalwork, gutters, flashing, roofing, automotive and industrial radiators, together with chemical process equipment, vats, kettles and pans.

This technical information is given by Holme Dodsworth Metals without charge and the user shall employ such information at their own discretion and risk. For more detailed technical advice on temper selection, fabrication, joining, machining, physical and mechanical data please contact us as space does not permit the listing of every feature of the material.