OFHC Copper Suppliers
OFE (Oxygen-Free Electronic) or OFHC (Oxygen-Free High Thermal Conductivity) Copper is the highest purity grade of copper at 99.99%.
Are you looking for a bespoke manufactured OFHC Copper product, insensitive to stress corrosion cracking? Speak to City Special Metals today, either via calling us or through a contact form. Alternatively, look through a range of other specialist alloys for information on our other bespoke manufactured products.
OFHC Copper Stockist Range
| Product Form | Range From | Range To | |
|---|---|---|---|
 |
Copper OFE Plate |
6.35mm | 127mm |
 |
Copper OFE Round Bar |
6.35mm | 200mm |
 |
Copper OFE Square Bar |
25.4mm | 50.8mm |
 |
Copper OFE Sheet |
0.254mm | 3.2mm |
 |
Copper OFE Coil |
0.076mm | 152.4mm |
 |
Copper OFE Wire |
2mm | 4mm |
 |
Copper OFE Tube |
3mm o/d x 1mm wall | 101.6mm o/d x 12.7mm wall |
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Beneficial Properties
- Conductivity Very good thermal and electrical conductivity
- Durability Strong performance, toughness and resilience
- Flexibility Good workability, weldability and easy to machine
- Corrosion-Resistant High resistance to certain corrosive environments and elements, fatigue and wear
Markets & Applications
- Electrical components and equipment such as: conductors, microwave mechanisms, transistor elements, seals in electric appliances
- High vacuum environments
- Applications where there is little risk of undesirable chemical reactions
- High Voltage electrodes
- Particle accelerators
OFHC Copper Composition
Mechanical Properties
| Metallurgical Condition | Hard | |
| Yield Strength | KSI (MPa) | 20 (137) Max |
| Tensile Strength | KSI (MPa) | 31-37 (213-255) |
| Hardness | HV | 40-65 |
| Elongation | (50mm) | 33 min - 42 max |
Technical Specifications
| Form | ASTM | |||
| Plate | F68 | B152 | B187 | |
| Rods | F68 | B152 | B187 | |
| Sheet | F68 | B152 | B187 | |
| Strip | F68 | B152 | B370 | |
| Wire | F68 | B1 | B2 |
Chemistry
| Copper | Cu | 99.99min |
| Oxygen | O | 0.0005 max |
Physical Properties
| Co Efficient of Thermal Expansion | ||
| -191-16°C | 10-6/°K | 14.1 |
| 20-300°C | 10-6/°K | 17.7 |
| Density | g/cm³ | 8.96 |
| Melting Point | °F | 1981 |
| °C | 1083 | |
| Modulus of Elasticity at 20°C | KSI | 17000 |
| Youngs / Shears Modulus | MPa | 127000 |
| Specific Heat | J/g-K°C | 0.39 |
| Thermal Conductivity at 20°C | W.m-¹°C | 386-394 |
| Electrical Conductivity | IACS @ 20°C | 101 |
| Thermal Coefficients of Electrical Resistance 0-100°C | 10-3/K | 3.81 |
Copper OFE FAQs
What is OFHC Copper, and what are its key properties?
OFHC Copper, also known as Oxygen-Free High Conductivity Copper, is a highly refined copper alloy containing a minimum of 99.99% copper. The low oxygen content provides exceptional electrical and thermal conductivity while improving ductility and resistance to hydrogen embrittlement. Its purity makes it ideal for precision-engineered components in electrical, vacuum, and cryogenic environments where consistent performance is essential.
What are the typical applications of OFHC Copper?
OFHC Copper is widely used in electrical conductors, vacuum systems, heat exchangers, and semiconductor production. Its high conductivity and purity make it a suitable alloy for aerospace systems, laboratory equipment, and other high-performance applications that require reliable conductivity and minimal contamination.
What are the uses of Copper OFE Plate?
Copper OFE Plate is typically used for heat sinks, electrical contacts, and base plates where excellent thermal transfer and corrosion resistance are needed. It provides a stable and highly conductive surface for components in power generation, electronic assemblies, and vacuum systems.
What are the uses of Copper OFE Round Bar?
Copper OFE Round Bar is used for machined parts such as electrodes, connectors, and precision fittings. Its uniform structure and excellent conductivity make it suitable for electrical and cryogenic equipment where durability and low resistance are critical.
What are the uses of Copper OFE Square Bar?
Copper OFE Square Bar is often chosen for bus bars, grounding assemblies, and structural conductors. Its rigid shape and consistent conductivity make it ideal for power distribution and heavy-duty electrical installations.
What are the uses of Copper OFE Sheet?
Copper OFE Sheet is used for electrical panels, enclosures, and vacuum chamber linings. The sheet form allows easy fabrication and reliable conductivity across large surface areas, making it valuable for electrical and thermal control systems.
What are the uses of Copper OFE Coil?
Copper OFE Coil is commonly used in transformer windings, electromagnetic coils, and the continuous production of electrical conductors. The coiled format allows long, consistent runs of high-conductivity copper for precision manufacturing applications.
What are the uses of Copper OFE Wire?
Copper OFE Wire is used in high-purity electrical wiring, motor windings, and instrumentation cables. The wire form combines high flexibility with excellent conductivity, making it suitable for sensitive electrical and measurement systems.
What are the uses of Copper OFE Tube?
Copper OFE Tube is ideal for heat exchangers, vacuum lines, and cryogenic piping systems. It provides efficient heat transfer, corrosion resistance, and purity required in medical, scientific, and high-vacuum applications.
We offer a bespoke service so, if you don’t see the size or form that you require, contact us either by phone, email or our contact form below, and we will provide a solution to your requirements.