Application Data Sheets – Copper Alloys

Copper Metals

Copper metals are used for their electrical and thermal conductivity, corrosion resistance, appearance and colour, and ease of working. They have the highest conductivity of the engineering metals and are very ductile and easy to braze, and generally to weld. Typical applications include electrical wiring and fittings, busbars, heat exchangers, roofs, wall cladding, tubes for water, air and process equipment.

There are a number of copper metals, with properties tailored for specific applications by judicious additions of traces of alloying elements. Copper metal is usually considered to contain no more than 0.1% of elements other than copper and silver.

Chemical Composition

AS2738.2 -1984

UNS No Code AS No Common Name BSI ISO JIS Cu Others Common End Uses
C10100
OFE
101
Oxygen-free electronic
Cu-OFE
C 1011
>99.99
Oxygen < 5 ppm
Busbars, waveguides, lead in wire, glass to metal seals
C10200
OF
102
Oxygen-free
C103
Cu-OF
>99.95
Oxygen < 10 ppm
Same as C10100
C10300
OFXLP
Oxygen-free extra low phosphorus
>99.95
Phosphorus 0.001-0.005%
Same as C10100
C11000
ETP
110
Electrolytic tough pitch
C101
Cu-ETP
C1100
>99.90
Electrical conductors, gaskets, switches, terminals and connectors, transformers, electronic parts, ball floats, drawn and spun holloware
C11600
STP
116
Silver bearing tough pitch
Cu-Ag
>99.90
Silver >0.085%
Electrical conductors, gaskets, switches, terminals and connectors, transformers, electronic parts
C12200
DHP
122
Phosphorus deoxidised, high residual phosphorus
C106
Cu-DHP
C 1220
>99.90
Phosphorus 0.015-0.040%
Tubing, heat exchangers, roofing, guttering and rainwater goods, facades
C14210
DPA
142
Phosphorus deoxidised arsenical
C107
>99.90
Similar to C12200, contains arsenic to inhibit aqueous corrosion.
C14400
144
Tin-copper radiator strip
>99.90

Phosphorus 0.013-0.025%

Tin 0.10-0.20%

Automotive Radiators
C14700
147
Sulphur bearing
C111
>99.90
Sulphur 0.20-0.50%
Machined copper components

Electrical Conductivity The electrical conductivity of copper is often used as a benchmark of the purity. Highest electrical conductivity is obtained with the purest copper. For ease of comparison, the conductivity of the purest commercial copper was set as the International Annealed Copper Standard (IACS) some years ago. 100% IACS corresponds to 0.5800 microhm?¹.cm?¹. Modern refining techniques now routinely produce copper of higher purity, which exceeds 100% IACS.

C11000, Electrolytic tough pitch copper, is the most commonly used metal in the group, with electrical conductivity of 100% IACS or better. It is made by melting cathode copper in a moderately reducing atmosphere, and may contain up to about 0.05% of oxygen as cuprous oxide. When heated above about 370°C in the presence of hydrogen (e.g. a gas flame) it may become hydrogen embrittled. C11000 is unsuitable for gas welding and high temperature brazing.

C10100 and C10200, Oxygen-free coppers, are made by melting cathode copper in low hydrogen, reducing conditions, without the addition of a deoxidising agent. These metals have high conductivity, exceptionally high ductility, low gas permeability, freedom from hydrogen embrittlement and low outgassing in a vacuum.

C10300 Oxygen-free extra low phosphorus copper, is made by melting cathode copper under less critical conditions, deoxidising with phosphorus and controlling for a low residual phosphorus. Properties are similar to C10100 and C10200 at lower cost.

C11600, Silver bearing tough pitch copper, is used where resistance to softening in the cold worked condition above about 200°C is required. Silver does not reduce the conductivity of the copper significantly.

C12200, Phosphorus deoxidised copper, has been made weldable and brazeable by deoxidising with phosphorus. It is used for flat products, tubing and similar applications. Phosphorus significantly reduces the conductivity, which may go as low as 70% IACS. C14210, Phosphorus deoxidised arsenical copper, also contains a small quantity of arsenic, which raises the softening temperature and significantly improves corrosion resistance in waters.

C14700, Sulphur bearing copper, has a sulphur addition to improve machinability. The reduction of conductivity is slight, to about 95% IACS.

Australian Product Specifications

Specification Product Form
AS1566
Rolled flat products
AS1567
Wrought rods, bars & sections
AS1568
Forging stock & forgings
AS1569
Seamless tubes for heat exchangers
AS1571
Seamless tubes for air conditioning & refrigeration
AS1572
Seamless tubes for engineering purposes

ASTM Product Specifications

Number Title C10100 C10200 C11000 C11600 C12200 C14700
B5
High Conductivity Tough Pitch Copper Refinery Shapes
?
?
?
B42
Seamless Copper Pipe, Standard Sizes
?
?
B68
Seamless Copper Tube, Bright Annealed
?
?
B75
Seamless Copper Tube
?
?
?
B88
Seamless Copper Water Tube
?
B111
Copper and Copper Alloy Seamless Condenser Tubes and Ferrule Stock
?
?
?
B124
Copper and Copper Alloy Forging Rod, Bar and Shapes
?
?
B152
Copper Sheet, Strip, Plate, and Rolled Bar
?
?
?
?
?
B187
Copper Bar, Bus Bar, Rod and Shapes
?
?
?
?
?
B188
Seamless Copper Bus Pipe and Tube
?
?
?
?
B280
Seamless Copper Tube for Air Conditioning and Refrigeration Field Service
?
B283
Copper and Copper Alloy Die Forgings (Hot Pressed)
?
?
B301
Free Cutting Copper Rod and Bar
?
B302
Threadless Copper Pipe
?
B306
Copper Drainage Tube (DWV)
?
B359
Copper and Copper Alloy Seamless Condenser and Heat Exchanger Tubes With Integral Fins
?
?
?
B360
Hard Drawn Copper Capillary Tube for Restrictor Applications
?
B372
Seamless Copper and Copper Alloy Rectangular Waveguide Tube
?
B379
Phosphorized Coppers Refinery Shapes
?
B395
U-Bend Seamless Copper and Copper Alloy Heat Exchanger and Condenser Tubes
?
?
B447
Welded Copper Tube
?
?
?
?
B543
Welded Copper and Copper Alloy Heat Exchanger Tube
?
B577
Detection of cuprous Oxide (Hydrogen Embrittlement Susceptibility) in copper
?
?
?
?
?
?
B640
Welded Copper and Copper Alloy Tube for Air Conditioning and Refrigeration Service
?
?
?
B694
Copper, Copper Alloy and Copper Clad Stainless Steel (CCS) and Copper Clad Alloy Steel (CAS) and Strip for Electrical Cable Shielding
?
B698
Seamless Copper and Copper Alloy Plumbing Pipe and Tube
?
?
B743
Seamless Copper Tube in Coils
?
?
B837
Seamless Copper Tube for Natural Gas and Liquified Petroleum (LP) Gas Fuel Distribution Systems
?

 

The technical advice and recommendations made in this Product Data Sheet should not be relied or acted upon without conducting your own further investigations, including corrosion exposure tests where needed. Please consult current editions of standards for design properties. Austral Wright Metals assumes no liability in connection with the information in this Product Data Sheet. Austral Wright Metals supplies a comprehensive range of stainless steels, copper alloys, nickel alloys and other high performance metals for challenging service conditions. Our engineers and metallurgists will be pleased to provide further data and applications advice.

 

BACK