Conductive Copper Wire - Knight Group

Conductive Copper Wire

Copper Wire Stock & Service Centre

Available Grades:

CU-ETP | CW004A | C11000 | C101
CU-ETP1 | CW003A
CU-OF | CW008A | C10300 | C103
 

Available in wire

Conductive Copper Wire: Precision Solutions for High-Conductivity Applications

High-performance conductive copper wire is designed for use in demanding electrical and electronic applications. Applications requiring conductive wire typically use commercially pure high-content copper alloys. These copper grades provide exceptional conductivity, formability, and purity,

The Knight Group is a copper alloy stock and service centre providing a comprehensive range of precision alloy wire, including oxygen-free copper (OFHC) and electrolytic tough-pitch (ETP) copper grades, ideal for electrical applications. As precision wire specialists with one of the most extensive wire production facilities in Europe, we can supply conductive wire tailored to meet your project requirements.

Our Conductive Copper Wire Range

We supply three primary conductive copper grades, each offering specific advantages depending on your technical and environmental requirements:

 

Cu-ETP / CW004A / C11000 / C101

Cu-HCP / CW021A / C10300 / C102

Cu-ETP1 / CW003A

We supply a comprehensive range of copper alloys for a variety of applications.

  • High Content Copper
  • Brass
  • Phosphur Bronze
  • Nickel Silver
  • Cupronickel
  • Beryllium Copper
  • Enamelled Copper

Conductive Copper Wire​

Guide to Conductive Copper Alloys

Conductive Copper wire is an excellent solution for creating a more conductive or efficient connection between two points. It has the highest conductivity of any non-precious metal and is ideal for use in electrical applications due to its durability and high performance. Conductive copper wire is also known as “fine silver” or even “white gold” because of its silver appearance. The most common form of copper is high conductivity copper, which is widely available in high quality.

The most common form of copper is high conductivity copper, which is widely available in high quality. This grade of copper is Electrolytic Tough Pitch (Cu-ETP), which has a 100% IACS.

For specific applications, oxygen free copper (Cu-OF) is available which prevents embrittlement and material cracking. Additionally, if increased strength is required, alloying elements such as tin, magnesium, chromium and iron can be added in small quantities. These alloys increase the strength but reduce conductivity.

As part of the Knight Group Knight Precision Wire are specialist manufacturers of Wire and Cable and can provide free quotations on your requirements. Please get in touch to arrange this.

High Conductivity Copper (Cu-ETP) & Oxygen Free Copper (Cu-OF)

High Conductivity Copper (Cu-ETP)
Electrolytic Tough Pitch high conductivity copper is the standard grade of copper for electrical conductivity applications, with 100% IACS. A higher grade Cu-ETP1 is made from Grade A copper cathode.

Oxygen Free Copper (Cu-OF)
For special welding and brazing applications, an oxygen free copper is available with 102% IACS. This copper avoids embrittlement in a heated reducing environment as hydrogen reacts with the oxide in the metal to form steam and material cracking.

Conductive Copper Alloy Properties

Chemical Properties
CONDUCTIVE COPPER ALLOYS GRADE DESIGNATIONS & CHEMICAL COMPOSITIONS (% BY WEIGHT)
MATERIAL DESIGNATION EN1652 or AlloyNEAREST FITTYPICAL CHEMICAL COMPOSITION %
Symbol/ NameNumberUNSBS 2870CuBeCoFeMnNiPPbSnZnOthersImpurities
HIGH CONDUCTIVITY COPPERS
Cu-ETPCW004AC11000C10199.9 min------0.005--Bi: 0.0005 O: 0.04-
Cu-ETP1CW003AC11040-Available by Request
Cu-OFCW008AC10200C10399.95 min------0.005--Bi: 0.00050.03
Mechanical Properties
MECHANICAL PROPERTIES FOR COPPER SPECIFICALLY USED IN ELECTRICAL CONDUCTOR APPLICATIONS
Material Designation BS EN 13602:2013Nearest equivalentMaterial ConditionUTS Nominal Rm N/mm²% Elongation 200mmConductivity
SymbolNumberUNSBS 4109Single WireMulti Line% IACS
Cu-ETPCW004AC10100C101Annealed20010 to 338 to 26100
Cu-OFCW008AC10300C103
Cu-ETP*CW004AC10100C101Annealed2005 to 315 to 2292.6 to 99.0
Cu-OF*CW008AC10300C103
Cu-ETPCW004AC10100C101Hard Drawn360 to 460--93.4 to 97.1
Cu-OFCW008AC10300C103
Cu-ETP*CW004AC10100C101Hard Drawn360 to 460--- to 96.2
Cu-OF*CW008AC10300C103
Cu-ETP1CW003AC11040-Available by Request

Conductive Copper Characteristics and Industrial applications

Features and Applications
CONDUCTIVE COPPER ALLOY FEATURES AND APPLICATIONS
MATERIAL DESIGNATION EN1652 or AlloyNEAREST FITKey FeaturesKey MarketsApplications
Symbol/ NameNumberUNSBS 2870
HIGH CONDUCTIVITY COPPERS
Cu-ETPCW004AC11000C101Cu-ETP has no susceptibility to hydrogen embrittlement as well as a high electrical conductivity of 101% IACS. This is due to a high purity and an absence of deoxidisers.Architectural, Chemical Engineering, Culinary, ElectricalElectrical Components, Chemical Process Equipment, Radiators, Kitchen Appliances, Conductors, Transformer Windings, Wire: Shapes, Knitting, Braiding, Weaving
Cu-ETP1CW003AC11040-Available by Request
Cu-OFCW008AC10200C103Cu-OF is a High purity Copper Oxygen Free (maximum of 10ppm) alloy, offering 100% IACS. It is immune from hydrogen embrittlement and offers similar formability to Cu-ETP.Electronics, TelecommunicationsPrinted Circuits, Electronic Components, Telecommunication Cables

Choosing your Conductive Copper Supplier

The Knight Group Advantage

Extensive Stock Availability: Quick access to common copper grades and dimensions

Fast Turnaround Times: Streamlined processes and an efficient supply chain ensure quick turnaround times so you can stay ahead of schedule.

Tight Tolerance Precision Processing: Comprehensive In-house wire processing capability, including cut-to-length, stranding, bunching, braiding, overbraiding and more

Custom Solutions: Bespoke material supply to meet your technical drawings or product specifications

Technical Expertise: Over 85 years of experience supporting global manufacturers every step of the way

Trusted Supply Chain Partner: Superior quality, with rigorous quality control measures, ensuring exceptional product performance, consistency, and reliability. Accredited ISO 9001, 9100 and 9120

Low MOQs: Order quantities suited to small-scale projects and prototyping through to high-volume production runs

Processing Services Available

We offer full-service support with the following value-added processes:

Cut-to-length wire
Stranding
Bunching
Bespoke spool type, size and weight to your specifications
Cleaning and degreasing for electronic and medical use
Protective packaging for safe shipment

Conductive Copper Applications by Sector​

Copper Alloys offer many manufacturing benefits, including strength, conductivity, corrosion resistance, machinability and ductility. With superior electrical and thermal conductivity and an attractive appearance, Copper Alloys are suitable for a wide range of applications.

Our conductive copper products are trusted across a wide range of industries:

Electronics & Electrical Engineering: Circuitry, battery connectors, EMI shielding

Automotive: EV battery connections, stator windings, sensors

Aerospace: Electrical grounding systems, avionics

Medical Devices: Precision components requiring high conductivity and biocompatibility

Renewable Energy: Solar panel connectors, inverters, wind turbine generators

Enquire About Conductive Copper Wire

Looking for conductive copper wire for your electrical applications? 

Unlock the potential of our conductive copper wire with the Knight Group. Contact us today to discuss your requirements and receive a tailored quotation.

Let our alloys propel your projects to new heights of success.

Use the links below or contact us directly at:

Precision Wire: +44 (0)1707 645261

Comprehensive FAQ Conductive Copper Alloy Wire

We hope this comprehensive FAQ guide will answer all your questions about our conductive copper wire product range and services. If you require further assistance or would like to place an order, you can use the contact form, +44 (0)1707 650251 or salesenquiries@knight-group.co.uk

Cu-ETP contains small traces of oxygen and is suitable for most electrical applications. Cu-OF is oxygen-free, offering higher conductivity and resistance to embrittlement, which is particularly important in vacuum or high-frequency environments.

Cu-ETP contains small traces of oxygen and is suitable for most electrical applications. Cu-OF is oxygen-free, offering higher conductivity and resistance to embrittlement, which is particularly important in vacuum or high-frequency environments.

IACS stands for the International Annealed Copper Standard.

IACS is the benchmark used to measure the electrical conductivity of metals. Materials like Cu-ETP and Cu-OF are rated as a percentage of this standard, helping engineers compare copper’s efficiency in electrical applications.

Yes, conductive copper can be used in high-temperature environments, but the specific grade matters.

Cu-ETP1 and Cu-OF offer greater stability in high-temperature or hydrogen-rich settings compared to standard Cu-ETP.

Available Grades & Specifications

We supply three primary conductive copper grades, each offering specific advantages depending on your technical and environmental requirements:

Cu-ETP (CW004A) – Electrolytic Tough Pitch Copper

  • Conductivity: ≥100% IACS
  • Purity: ≥99.90% Cu
  • Characteristics: Standard grade copper with excellent electrical conductivity and workability.
  • Applications: Electrical wiring, busbars, power connectors, switchgear, circuit boards.

Cu-OF (CW008A) – Oxygen-Free Copper

  • Conductivity: ≥101% IACS
  • Purity: ≥99.95% Cu
  • Characteristics: Superior conductivity, no oxygen content, improved resistance to hydrogen embrittlement.
  • Applications: Vacuum tubes, audio equipment, sensitive electronic components, high-frequency conductors.

Cu-ETP1 (CW003A) – High-Purity ETP Copper

  • Conductivity: Slightly higher than standard Cu-ETP
  • Purity: Enhanced compared to standard ETP
  • Characteristics: Improved electrical performance, reduced risk of embrittlement during processing.
  • Applications: Transformers, electric motors, renewable energy systems.

These grades are available in precision wire. We can supply material in various tempers, sizes, and weights, each tailored to your exact specifications.

Absolutely. We support both small-scale projects and high-volume production runs.

To find out more, please get in touch with our knowledgable sales team:

Contact form

Telephone: +44 (0)1707 645261 

Email: wire.sales@knight-group.co.uk

We typically supply conductive copper in round wire and flat wire, and some grades may also be available in shaped wire and strip. 

Custom dimensions are available to suit your specific needs.

To find out more or request a non-obligation quote, please contact our sales team:

Contact form

Telephone: +44 (0)1707 645261 

Email: wire.sales@knight-group.co.uk

Yes, we supply copper in a range of tempers, including:

  • Annealed copper wire
  • Hard-drawn copper wire.
  • Other tempers available by request

We offer free quotations on your individual product and processing requirements and can provide expert advice on selecting the material for your application. Let us know your specific requirements, and we will deliver material that meets your exact needs.

To find out more, please get in touch with our knowledgable sales team:

Contact form

Telephone: +44 (0)1707 645261 

Email: wire.sales@knight-group.co.uk

Quality assurance is integral to our operations. We employ rigorous and non-destructive evaluation to ensure that our materials meet the highest quality standards demanded by our customers.

We hold a number of recognised industry approvals, as well as ISO 9001, ISO 9120 REV A and 9100.  For full details and copies of our certification, visit our dedicated Approvals page or contact one of dedicated team for further instance on our contact form, +44 (0)1707 650251 or salesenquiries@knight-group.co.uk

Further testing and inspection protocols, including chemical analysis, mechanical testing are available by request, prior to order placement.

Lead times vary depending on quantity and processing needs, but standard stock items can often be dispatched within a few working days.

To find out more, please get in touch with our knowledgable sales team:

Contact form

Telephone: +44 (0)1707 645261 

Email: wire.sales@knight-group.co.uk

Yes, all our copper grades conform to applicable RoHS and REACH regulations.

 Documentation is available to download here.

You can purchase high-quality conductive copper wire from our dedicated wire division, Knight Precision Wire.

We supply over 160 unique alloy grades, including the most popular alloys used in applications requiring conductive copper materials.

We offer free quotations on your individual product and processing requirements and can provide expert advice on selecting the material for your application.  To find out more, use our contact form, telephone us at Telephone: +44 (0)1707 645261 or email our expert sales at wire.sales@knight-group.co.uk

All data is provided for informational purposes only. In no event will the Knight Group and its subsidiaries, be liable for in respect of any action taken by any third party arising from using the information taken from our online or printed sources. Chemical and Mechanical Properties should not be construed as maximum or minimum values for specifications, nor should information be used to assess suitability for a particular use or application. The information and data provided is deemed to be accurate to the best of our knowledge and may be revised anytime without notice and assume no duty to update

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