High-purity copper materials suitable for making high-conductivity parts, high thermal conductivity parts, vacuum electronic devices, precision copper parts, electrodes, terminal connectors, heat dissipation structural components, and copper alloy parts with high material purity requirements.
TU2 Oxygen-Free Copper is a high-purity, oxygen-free copper material with low oxygen content, offering excellent electrical conductivity, thermal conductivity, ductility, weldability, and good processing properties. It is commonly used in parts that require electrical conductivity, thermal conductivity, vacuum performance, welding stability, and material purity, such as conductive strips, connecting terminals, heat sinks, electrodes, vacuum electronic devices, precision copper parts, and high thermal conductivity structural components. Compared to ordinaryPure CopperT2, TU2 Oxygen-Free Copper has lower oxygen content and performs more stably in vacuum, high-temperature welding, and highly conductive applications.
By focusing on application scenarios, boundaries of advantages, and non-recommended scenarios, it helps sales, customer service, and quoting staff quickly determine whether the material meets current part requirements.
Good electrical conductivity, thermal conductivity, low oxygen content, good ductility, good weldability, good brazing performance, suitable for vacuum and electronic and electrical applications, suitable for precision conductive and heat dissipation components, with material purity higher than ordinaryPure Copper.
Conductive strips, copper terminals, connecting sheets, electrodes, conductive contacts, heat sinks, heat sink blocks, heat conduction parts, vacuum electronic devices, RF devices, copper parts for electronic and electrical appliances, electrical connectors for motors, precision copper bushings, copper gaskets, copper sealing parts, welded copper parts, high thermal conductivity clamps, copper parts for laboratory equipment.
High-strength load-bearing parts, high-hardness wear-resistant parts, high-elasticity snap-fit parts, long-term strong friction moving parts, high-rigidity structural parts, lightweight structural parts, parts in strong acid and strong alkali environments, parts in sulfur or ammonia-containing corrosive environments, low-cost ordinary structural parts, and parts requiring high-strength threaded connections.
The following parameters come from product information and material knowledge fields, used for design review, quotation communication, and preliminary judgment before material selection.
| Material positioning | High-purity copper materials suitable for making high-conductivity parts, high thermal conductivity parts, vacuum electronic devices, precision copper parts, electrodes, terminal connectors, heat dissipation structural components, and copper alloy parts with high material purity requirements. |
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| Precision performance | TU2 Oxygen-Free Copper suitable for CNC turning, milling, drilling, tapping, stamping, bending, wire cutting, and some precision machining. Because copper is relatively soft and has high thermal conductivity, it is prone to knife sticking, burrs, knife marks, surface scratches, and thin-wall deformation during processing. Precision conductive surfaces, sealing surfaces, assembly holes, and welded surfaces are recommended to separately control tolerances and surface roughness. |
| Dimensional tolerances | The conventional dimensional tolerances of CNC machining TU2 Oxygen-Free Copper can be referenced as ± 0.02mm to ±0.10mm, while ordinary structural parts can be evaluated at ±0.10mm-±0.20mm. The overall dimensional tolerance for stamped, bent, or large-size thin copper plates may be larger. These values are standard reference ranges and do not guarantee absolute tolerances for all structures. Actual values should be confirmed based on part dimensions, wall thickness, processing methods, surface treatment, and assembly requirements. |
| Minimum Wall Thickness | The wall thickness of ordinary CNC machined structures is recommended to be no less than 0.8mm-1.0mm. Because oxygen-free copper is relatively soft, thin-walled structures are prone to deformation, dents, or machining vibrations, so the load-bearing positions, thread positions, welding positions, and large sheet positions should be appropriately thickened. For stamped copper sheets or conductive connectors, thinner sheets can be selected based on current, heat dissipation, elasticity, and assembly requirements, but deformation and strength must be evaluated. |
| Recommended wall thickness | Standard conductive sheets and connectors are recommended 0.5mm-2.0mm; ordinary CNC copper parts are recommended 1.0mm-3.0mm; heat sinks, conductive blocks, terminals, busbars, and the positions of assembly forces are recommended to be above 2.0mm, and design should be based on current capacity, heat conduction requirements, screw tightening force, and structural strength. |
| Minimum aperture | CNC machining can achieve smaller hole diameters, but copper is softer, making small and deep holes prone to burrs, tool sticking, and chip removal difficulties. For general designs, the recommended aperture is no less than 1.0mm. It is recommended to reserve space for precision holes, screw holes, positioning holes, and conductive contact holes, and if necessary, drilling, reaming, boring, or deburring are used. |
| Assembly clearance | For precision metal assembly, one side can be reserved at 0.02mm-0.10mm according to fitting requirements; for ordinary plug-in and assembly, it is recommended to reserve 0.10mm-0.30mm per side. If parts require tin, nickel, silver, gold, or anti-oxidation treatments, additional gaps should be reserved according to the thickness of the coating. The conductive contact position should not be too loose; it should be evaluated separately in consideration of contact pressure, surface treatment, and conductivity requirements. |
| Detailed performance | TU2 Oxygen-Free Copper suitable for machining holes, grooves, steps, chamfers, threads, conductive contact surfaces, heat dissipation surfaces, and simple structural details. Because the material is soft, overly fine sharp corners, thin edges, elongated stitches, and tiny text are prone to deformation, burrs, or weakening after post-processing. LOGO, numbering, and markings are recommended to be achieved through laser marking, engraving, etching, or subsequent surface treatment, with key conductive surfaces avoiding excessive texturization. |
| Surface effect | TU2 Oxygen-Free Copper raw surface usually appears as a purplish-red or copper-colored metallic texture, with a typical pure copper appearance. Polishing produces a brighter red copper surface, brushing produces linear metal textures, and sandblasting produces a matte copper finish. Long-term exposure to air gradually oxidizes and darkens, and the surface may appear brown, dark red, or oxidized spots. If long-term appearance and conductivity stability are needed, tin, nickel, silver, gold, or oxidation protection can be applied. |
Based on material characteristics and suitable product ranges, customer needs are broken down into easier application directions to determine.
Conductive strips, copper terminals, connecting sheets, electrodes, conductive contacts, heat sinks, heat sink blocks, heat conduction parts, vacuum electronic devices, RF devices, copper parts for electronic and electrical appliances, electrical connectors for motors, precision copper bushings, copper gaskets, copper sealing parts, welded copper parts, high thermal conductivity clamps, copper parts for laboratory equipment.
High-purity copper materials suitable for making high-conductivity parts, high thermal conductivity parts, vacuum electronic devices, precision copper parts, electrodes, terminal connectors, heat dissipation structural components, and copper alloy parts with high material purity requirements.
The core features of TU2 Oxygen-Free Copper are high electrical conductivity, high thermal conductivity, and low oxygen content. It has better electrical and thermal conductivity than ordinary Brass, aluminum alloys, and most steels, making it suitable for electrical connections, thermal management, and vacuum electronics applications. TU2 material is relatively soft, with low strength and hardness, making it prone to scratches, indentations, and processing burrs, making it more suitable for conductive and thermal functional components rather than high-strength structural or wear-resistant parts.
Based on wall thickness, hole position, assembly clearance, dimensional tolerances, and material usage risks, determine in advance whether the part structure is suitable for TU2 Oxygen-Free Copper.
Post-processing of TU2 Oxygen-Free Copper affects appearance, dimensions, hole position, assembly clearance, and usage validation results, and should be explained in advance during quotation, DFM review, and sample confirmation stages.
Post-processing should focus on appearance display, dimensional fitting, connection assembly, and testing verification. Parts involving assembly positions need to be reserved in advance for machining, coating, and trial assembly allowances.
For common issues such as threads, snaps, strength, temperature resistance, and weather resistance, identify in advance whether the material needs to be replaced or if another processing method should be used.
When customer demand exceeds TU2 Oxygen-Free Copper material boundaries, it is necessary to combine strength, temperature resistance, toughness, long-term stability, and mass production goals to promptly recommend alternative materials or processing technologies.
If lower-cost ordinary conductive copper parts are needed, Pure CopperT2 can be chosen; If higher purity and stricter oxygen-free requirements are required, TU1 oxygen-free copper can be chosen; If higher strength and wear resistance are required, beryllium copper, chromium-zirconium copper, or Brass can be chosen; If better machinability and decorative performance are needed, Brass H59 and H62 can be chosen; If a lightweight heat dissipation structure is needed,6061 Aluminum Alloy or AlSi 10Mg can be chosen; If high corrosion resistance is required, stainless steel or nickel-plated copper parts can be chosen.
If customers mainly care about electrical conductivity, thermal conductivity, low oxygen content, welding stability, and suitability for vacuum environments, TU2 Oxygen-Free Copper is the appropriate choice. If the customer only processes ordinary copper parts and does not have high requirements for oxygen-free performance, Pure CopperT2 is usually more economical. If customers require high strength, wear resistance, elasticity, or long-term mechanical load-bearing capacity, TU2 is not recommended; instead, chromium-zirconium-copper, beryllium-copper, Brass, steel, or other structural materials should be considered.
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