COPPER & COPPER ALLOYS


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Copper & Copper Alloys
Copper & Copper Alloys
Copper & Copper Alloys

Copper forms the basis of number of very useful alloys (brass, bronze etc) however, it remains an extremely useful metal in its own right. Copper has an electrical conductivity that is superior to all metals other than silver and it has a very high thermal conductivity too. It can be worked very easily making it the material of choice for many applications. Its ability to form a protective oxide film with an attractive green patina has also made it the material of choice for many constructional applications, particularly roofing.

The softness of ‘commercially pure’ copper makes it a difficult metal to machine. In its more highly alloyed state (particularly with the addition of zinc and lead to form free cutting brass, against which almost all other metals are indexed for their machinability) this is not a problem, but to retain the higher conductivity of copper or its aesthetic appearance, the addition of sulphur gives a greatly increased cutting ability, to as high as 80% on the machinability index. Tellurium can be used an alternative to sulphur to obtain the same result.

Nearest Equivalent Specification

Available Products

C101

A high conductivity copper that is commonly used in electrical applications but it is also suitable for general engineering. In an annealed state it should have 100% conductivity though it should not be used in reducing atmospheres.

EN
ISO
 

CW004
Cu-ETP
 

C103

An oxygen free copper, similar in its attributes to CW004. However it is "oxygen free" and is thus suitable for applications where it will be heated in a reducing atmosphere. In such conditions embrittlement should be minimal.

EN
ISO
 

CW008
Cu-OF
 

C106

A phosphorus-deoxidised copper that has good welding and brazing properties but reduced electrical conductivity. It finds many applications in general engineering particularly in chemical environments due to good corrosion resistance.

EN
ISO
 

CW024
Cu-DHP
 

C109

A free machining, high conductivity copper containing tellurium to improve machinability without significantly altering conductivity. Machinability index approximately 80, conductivity approximately 93% of C101.

EN
ISO

CW118C
CuTeP

C110

An oxygen free, high purity, “electronic” copper. Suitable for applications that call for it to be heated in a reducing atmosphere. In such conditions embrittlement should be minimal.

EN
ISO

CW009A
Cu-OFE

C111 SigmaChip®C2

A free machining, high conductivity copper containing sulphur to improve machinability without significantly altering conductivity. Machinability index approximately 80, conductivity approximately 93% of C101.

EN
ISO
 

CW114
CuSP
 

ULTIBRON™ CNS

A versatile high to very high strength copper-nickel-silicon alloy offering excellent bearing properties, good electrical & thermal conductivity and very low magnetic permeability. Used in aerospace/defence and autosport.

EN
BS
 

CW111C
BSB25
DTD 498

Other Copper Alloys
 

See Beryllium Copper, Brass Alloys, Bronze Alloys and Copper Nickel Alloys.