Wrought and Unwrought Coppers—Compositions, Properties and Uses

Copper is available in a number of grades, with different properties, to suit different applications. All grades, except for CW024A (used for pipes and roofing) have electrical applications. The types of copper are oxygen free, tough pitch and phosphorus deoxidised, all of which may be alloyed with small amounts of silver which increases the temperature resistance. Compositions, properties and uses of wrought and unwrought coppers are provided in the table below.

The electrical conductivity is shown as % IACS (International Annealed Copper Standard), first used in 1913. Values greater than 100% reflect the higher purity copper now available. The mechanical properties of all the grades are very similar, shown in ranges from soft to hard.

Applicable product standards for wrought and unwrought coppers are provided elsewhere.

For more detail, the appropriate standard(s) should be consulted. Visit our page with details of standards and links to the BSI shop.

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Wrought and Unwrought Coppers—Compositions, Properties and Uses

DescriptionEN
Number
(Wrought)
EN
Number
(Unwrought)
EN
Symbol
Nearest
Old BS
Equiv.
(Wrought)
Nearest
Old BS
Equiv.
(Unwrought)
Copper %
Range/Max.
of 19
Elements
(see Exclusions)
19 elements other than copper are:  Ag, As, Bi, Cd, Co, Cr, Fe, Mn, Ni, O, P, Pb, S, Sb, Se, Si, Sn, Te, Zn
Max. Mass
Resistivity
(Ω g/m2)
at 20 ° C
(Annealed)
Nominal
Min. Conductivity
(% IACS)
at 20 ° C
(Annealed)
0.2%
Proof
Strength
(N/mm2)
Tensile
Strength
(N/mm2)
Elongation
(%)
Hardness
(HV)
Characteristics and Uses
Copper Cathode-CR001ACu-CATH-1-Cu-CATH-1Rem.0.00650.15176101----Flat products for re-melting made by electrolytic deposition.
Copper Cathode-CR002ACu-CATH-2-Cu-CATH-299.90 min.*0.03 excl. Ag0.15328100----Flat products for re-melting made by electrolytic deposition.
Coppers ex Cu-CATH-1CW003ACR003ACu-ETP1C100Cu-ETP1Rem.0.0065 excl. O, 0.04 O0.1517610150-340200-40050-540-120For re-draw to wire; suitable for high speed annealing and enameling.
Coppers ex Cu-CATH-1CW007ACR007ACu-OF1C103Cu-OFRem.0.0065 excl. O0.1517610150-340200-40050-540-120Oxygen-free version of ETP1 for use in reducing atmospheres.
Coppers ex Cu-CATH-1CW009ACR009ACu-OFEC110Cu-OFE99.99 min15 elements listed individually0.1517610150-340200-40050-540-120High purity, does not contain elements that can vaporize in a vacuum. Resists hydrogen (steam) embrittlement. Easily soldered and brazed. Used in critical electrical, electronic and communication components.
Coppers ex Cu-CATH-1CW022ACR022ACu-PHCE--99.99 min0.001-0.006 P plus 14 elements listed individually0.1532810050-340200-40050-540-120Phosphorus deoxidised. Resists hydrogen (steam) embrittlement. Easier to braze than Cu-ETP1. Used for busbars and cables.
Other Unalloyed CoppersCW004ACR004ACu-ETPC101Cu-ETP-299.90 min.*0.03 excl. Ag, O0.1532810050-340200-40050-540-120Most common copper, universal for electrical applications. Subject to hydrogen (steam) embrittlement in reducing atmospheres.
Other Unalloyed CoppersCW005ACR005ACu-FRHCC102Cu-FRHC99.90 min.*0.06 excl. Ag, O0.15328100----Copper that has been refined by melting in a furnace, no electrolysis. Uses include building and automotive wire and power cable.
Other Unalloyed CoppersCW008ACR008ACu-OFC103Cu-OF99.95 min.*0.03 excl. Ag0.1532810050-340200-40050-540-120Oxygen-free version of Cu-ETP for use in reducing atmospheres.
Other Unalloyed CoppersCW006ACR006ACu-FRTPC104Cu-FRTP99.90 min.*0.05 excl. Ag, Ni, O--50-340200-40050-540-120General engineering and building applications, not for use in reducing atmospheres.
Phosphorus-containing CoppersCW020ACR020ACu-PHC--99.95 min.*0.03 excl. Ag & P (0.001-0.006 P)0.1532810050-340200-40050-540-120Small amount of phosphorus deoxidizer, electrical and thermal conductivity still high. Excellent soldering and brazing. Resists hydrogen (steam) embrittlement. Electrical, electronic applications including tubular busbars.
Phosphorus-containing CoppersCW021ACR021ACu-HCP--99.95 min.*0.03 excl. Ag & P (0.002-0.007 P)0.1559698.350-340200-40050-540-120Small amount of phosphorus deoxidizer, electrical and thermal conductivity still high. Excellent soldering and brazing. Resists hydrogen (steam) embrittlement. Electrical, electronic applications including tubular busbars.
Phosphorus-containing CoppersCW023ACR023ACu-DLP--99.90 min.*0.03 excl. Ag, Ni & P (0.005-0.013 P)--50-340200-40050-540-120Electrical engineering, strip for lead frames. Minimum electrical conductivity values agreed between purchaser and supplier, typically 95% IACS
Phosphorus-containing CoppersCW024ACR024ACu-DHPC106Cu-DHP99.90 min.*0.015-0.040 P--50-340200-40050-540-120Non-electrical. Water and gas pipes in sanitary and heating applications (EN1057). Approved for drinking water contact under 4MS. Sheet and strip for building (EN 1172). Architecture, roofing, cladding. Excellent soldering and brazing.
Phosphorus-containing Coppers-CR025ACu-DXP--99.90 min.*0.03 excl. Ag, Ni & P (0.04-0.06 P)------Cu-DXP is used for anodes for electroplating.
Silver-bearing-Tough Pitch CoppersCW011ACR011ACu-Ag 0.04C101Cu-Ag-2Rem.0.03 excl. Ag & O (0.03-0.05 Ag, 0.04 O)0.1532810050-340200-40050-540-120Silver increases creep strength, uses in large alternators, motors, tram/trolley wires.
Silver-bearing-Tough Pitch CoppersCW012ACR012ACu-Ag 0.04C101Cu-Ag-3Rem.0.03 excl. Ag & O (0.06-0.08 Ag, 0.04 O)0.1532810050-340200-40050-540-120Silver increases creep strength, uses in large alternators, motors, tram/trolley wires.
Silver-bearing-Tough Pitch CoppersCW013ACR013ACu-Ag 0.10C101Cu-Ag-4Rem.0.03 excl. Ag & O (0.08-0.12 Ag, 0.04 O)0.1532810050-340200-40050-540-120Silver increases creep strength, uses in large alternators, motors, tram/trolley wires.
Silver-bearing Phosphorus Deoxidised CoppersCW014ACR014ACu-Ag 0.04P--Rem.0.03 excl. Ag & P (0.03-0.05 Ag, 0.001-0.007 P)0.1559698.350-340200-40050-540-120Silver increases creep strength, uses in large alternators, motors, tram/trolley wires.
Silver-bearing Phosphorus Deoxidised CoppersCW015ACR015ACu-Ag 0.07P--Rem.0.03 excl. Ag & P (0.06-0.08 Ag, 0.001-0.007 P)0.1559698.350-340200-40050-540-120Silver increases creep strength, uses in large alternators, motors, tram/trolley wires.
Silver-bearing Phosphorus Deoxidised CoppersCW016ACR016ACu-Ag 0.10P--Rem.0.03 excl. Ag & P (0.08-0.12 Ag, 0.001-0.007 P)0.1559698.350-340200-40050-540-120Silver increases creep strength, uses in large alternators, motors, tram/trolley wires.
Silver-bearing Oxygen Free CoppersCW017ACR017ACu-Ag 0.04(OF)C103Cu-Ag-OF2Rem.0.0065 excl. Ag & O (0.03-0.05 Ag)0.1532810050-340200-40050-540-120Silver increases creep strength, uses in large alternators, motors, tram/trolley wires.
Silver-bearing Oxygen Free CoppersCW018ACR018ACu-Ag 0.07(OF)--Rem.0.0065 excl. Ag & O (0.06-0.08 Ag)0.1532810050-340200-40050-540-120Silver increases creep strength, uses in large alternators, motors, tram/trolley wires.
Silver-bearing Oxygen Free CoppersCW019ACR019ACu-Ag 0.10(OF)C103Cu-Ag-OF4Rem.0.0065 excl. Ag & O (0.08-0.12 Ag)0.1532810050-340200-40050-540-120Silver increases creep strength, uses in large alternators, motors, tram/trolley wires.
Wrought and Unwrought Coppers—Compositions, Uses and Typical Propertiescopperalliance.org.uk

Table Notes:
* including silver, up to a maximum of 0.015 (Ag)
Unwrought coppers in EN 1976 – Cast Unwrought Copper Products and EN 1978 – Copper Cathodes
19 elements other than copper are: Ag, As, Bi, Cd, Co, Cr, Fe, Mn, Ni, O, P, Pb, S, Sb, Se, Si, Sn, Te, Zn
Compositions are given as either a range or a maximum.
1N/mm2 = 1MPa