Tungsten Alloy 75%W-25%Cu Ring

• Type: Cu (Copper/Copper-Alloy Welding Electrode)
• Material: Wcu 70/30, Wcu 75/25, Wcu 80/20, Wcu 90/10
• Diameter: Standard or by Drawing
• Length: Standard or by Drawing
• Welding Core Type: Alloy Structual Tungsten
• Electrode Coating Type: Tungsten Alloy
• Model NO.: OD125xID40X 60MM
• Function: Surfacing Electrode, High Efficient Iron Powder Electrode
• Composition: 65%W35%Cu, 70%W30%Cu, 75%W25%Cu, 80%W20%Cu Copper
• Standard: Rwma Class
• Shapes: Wire, Rod, Bar, Strip, Foil, Block, Plate, Ring
• Tungsten: Ring
• Tungsten Alloy: Ring
• Copper Tungsten: Disc
• Tungsten Copper: Plate
• W-Cu Alloy: Rod
• 75%W-25%Cu: Block
• Machined Tungsten: Tungsten Copper Disc
• Tungsten Copper Alloy: Plate and Disc
• Transport Package: Export Wooden Cases
• Specification: Standard sizes or customized
• Trademark: Kefeng
• Origin: China
• HS Code: 81019990
• Production Capacity: 3000kgs Per Month

Product Description

Kefeng's Copper tungsten (CuW, WCu) has been regarded as a highly conductive and erasion resistant composite material that is extensively used as copper tungsten electrodes for EDM machining and resistance welding, electrical contacts in high voltage applications, and heat sinks and other electronic packaging materials in thermal applications.

 

The most common tungsten/copper ratios are WCu 70%W-30%Cu, WCu 75%W-25%Cu, 80%W-20%Cu.  Our tungsten copper product range includes copper tungsten rod, foil, sheet, plate, tube, tungsten copper rod and machined parts. 

As an tungsten alloy products manufacturer, Xi'an Kefeng Powder Metallurgy Co., Ltd has 25 years production and export experience.

Certification: Corporation is ISO9001 Certified, SGS approved and has been manufacturing the highest quality tungsten alloy metals. 

Product mechnical and physical properties

Composition	Density (g/cm3)	Electrical Conductivity (IACS% Min.)	Thermal Conductivity (W/m-K-1)	Hardness (HRB Min.)
WCu 70/30	14.0	52.1	230	95
WCu 75/25	14.8	45.2	220	99
WCu 80/20	15.6	43	200	102
WCu 90/10	16.75	32.5	180	107

They also possess good thermal and electrical conductivity.  We, Kefeng Powder Metallurgy Co., manufactures and supplies DRC Conflict Free material only.



Application
 

Copper Tungsten Electrode

Tungsten copper is widely used in applications such as electrodes for sinker electrical discharge machining (EDM) and resistance welding. Copper tungsten EDM electrode is capable of machining hard refractory alloys such as titanium carbide and tungsten carbide. Copper tungsten can yield a better MMR (material removal rate) at a low level of TWR (tool wear rate) in comparison to copper, graphite, and other common materials electrodes. In addition, copper tungsten electrodes will become more desirable to utilize if the machining work requires high accuracy in dimension or an intricated geometry.

Therefore, copper tungsten is a relatively cost-saving and efficient option with respect to overcoming machining difficulties caused by a high melting temperature, and high thermal shock and abrasion resistance. Tungsten copper composites are also a preferred gourp of material in resistance welding electrodes. This is both because of the excellent conductivity of copper and the high melting point and the corrosion resistance of tungsten.

Copper Tungsten Heat Sink And Packaging Material

Copper tungsten is a promising material commonly utilized in integrated circuits and high-power microelectronic devices as heat sink and packaging materials. Tungsten copper alloy exhibited superior thermal conductivity and machinability. Most importantly, copper tungsten composites process a relatively low and tailorable coefficient of thermal expansion. In addition, the CTE range of copper tungsten composites overlapped with that of semiconductor materials like SiC and ceramics substrate materials like Aluminum oxide (Al2O3) and Beryllium oxide (BeO). Therefore, WCu composite can be tailored to a close CTE to each material and efficiently prevent them from the damage of thermal stress fatigue.

Copper Tungsten Contact

Copper tungsten contact presents high closing and breaking performance in applications of high voltage circuit breakers, no matter what the interrupting medium is, e.g. an oil, vacuum, SF6 gas, or air environment. When the low melting point copper particles melt and evaporate from the tungsten skeleton, those particles absorb large amounts of heat generated by the electrical arc. Apart from the cooling effect of copper tungsten, the high melting point tungsten particles also take credit for the superiority of copper tungsten contact by offering an unmatchable resistance to arc-erosion and a high density.

Copper Tungsten Nozzle

Copper tungsten (Cu W) has also been proven to be one of the preferred materials for aviation and aerospace applications. Tungsten has a low thermal expansion and a high melting point. At the same time, the copper infiltrates contribute an exceptional transpiration cooling effect to the copper tungsten components when the working temperature is from 2000^oC to 3300 ^oC.  Therefore, the infiltrated tungsten provides superior resistance to thermal shock. It is critical to ensure the complex machined component maintains a stable condition and accurate dimension. These advantageous properties are why copper tungsten is widely used to make high-temperature resistance components such as the nozzles and throats of missiles and rockets.

 

1. Resistance welding electrodes
2. Circuit breakers (air or oil immersed)
3. Arcing tips
4. Heavy-duty contactors
5. EDM electrodes
6. Make-and-break contacts
7. Relays/switches

Technical parameters

Materials	Wt% Tungsten Content	Wt% Copper Content	Grade	RWMA Class	Density (g/cc)	Electrical Conductivity (%IACS)	Hardness (HRB)
W70Cu30	70	Balance	A5WC	10	14.18	47-52	88-95
W75Cu25	75	Balance	A10WC	11	14.80	42-50	96-99
W80Cu20	80	Balance	A30WC	12	15.60	41-49	99-104

Note: The values are typical and not to be used for specifications.