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Time of issue:2020-03-17 00:00:00

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Tungsten copper

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Tungsten Copper ：
　　Tungsten-Copper alloy is the composite of Tungsten and Copper, which own the excellent performances of Tungsten and Copper, such as heat-resistant, ablate-resistant, high-intensity, excellent thermal and electrical conductivity. It is easy to be machined. It is used widely in such industries as engine, electrical power, electron, metallurgy, spaceflight and aviation. Using CIP formation, sintered tungsten skeleton and infiltrating copper (silver) technology, large size and special shape products of tungsten-copper (silver) composites with 6-90 percent of copper are produced, such as electric contacts, electrode, refractory parts, heat sinks and parts of rocket, We can also produce sheet material, tubing, plate and other small products by mould pressing, extrusion pressing and MIM.

Main Specifications of W-Cu Composite

Type	Density g/cm3	Conductivity %IACS	HB MPa	Size mm
WCu50	11.9~12.3	≥55	1130~1180	Tube: Ø3~390 Length<500 Sheet: Width<390 Length<500 Special type: Width<390 Length<500
WCu40	12.8~13.0	≥47	≥1375
WCu30	13.8~14.4	≥42	≥1720
WCu20	15.2~15.6	≥34	≥2160
WCu10	16.8~17.2	≥27	≥2550
WCu7	17.3~17.8	≥26	≥2900

90WCu sheet

Tungsten copper electrodes Tungsten copper heat sinks

Resistance Welding
　　The high physical and mechanical properties, as well as the thermal and electrical conductivity, of refractory metal composites make these materials very suitable for die inserts and electrode facings, flash and butt welding dies, and hot upsetting. They can also solve heat balance problems.

Content	Density g/cm³	Hardness HRB	Conductivity %IACS	Class	RWMA
W50Cu50	≥11.9	≥65	≥54
W55Cu45	≥12.5	≥70	≥49	10	10.7445
W70Cu30	≥14.1	≥82	≥42
W75Cu25	≥14.5	≥90	≥38	11	11.744
W80Cu20	≥15.2	≥100	≥34	12	12.7435
W85Cu15	≥15.9	≥240HB	≥30
W90Cu10	≥16.75	≥260HB	≥27

Heat Sinks
　　JBNR developed CuW75 to be used extensively in thermal mounting plates, chip carriers, flanges, and frames for high-power electronic devices. As a copper tungsten material, it’s a composite, so both the thermal advantages of copper and the very low expansion characteristics of tungsten can be utilized.
The combination of these two materials results in thermal expansion characteristics similar to those of silicone carbide, aluminum oxide, and beryllium oxide, used as chips and substrates. Because of its thermal conductivity and expansion characteristics, it works well in densely packed circuits.

Typical proprerties Heat Sink of W-Cu

Material Composition	W-10Cu	W-15Cu	W-20Cu	W-25Cu	W-30Cu
Density (g/cm3)	17.1	16.4	15.5	14.8	14.2
TC (W/m·K)	191	198	221	235	247
CTE (×10-6/K)	6.3	7.1	7.6	8.5	9.0

Electrical Contacts

JBNR developed CuW70,CuW80 contacts with applications as following:

　　·arcing contacts and plates

　　·arc runners

　　·current carrying members

　　·blade facings

　　All of our materials are produced by the press, sinter, and infiltrate process. Each manufacturing step, including the basic powder, is closely controlled, monitored, and signed off on by Quality Assurance. After completion, all manufactured lots are checked for conductivity, density, and hardness prior to shipping. This information is recorded and kept on file, and also accompanies the parts or materials when requested.

EDM and ECM
　　tungsten composites are used worldwide for EDM (Electrical Discharge Machining) and ECM (Electrochemical Machining) electrodes. All material is manufactured by the press, sinter, and infiltrate process. Virgin powders are used, resulting in a consistent homogeneous material giving high and even burning rates. Copper tungsten is used in plunger/sinker applications where intricate definition is required, especially in tungsten carbide.

Dimensions
　　Balls: φ 1.5mm -φ 100mm
　　Shafts: （φ1mm above）×（Length max.600mm）
　　Sheets: （Thickness 0.15mm above）×（Wideness max.200mm）×（Length max.500mm）
　　Square, round and rectangle sizes: diameter 550mm above
　　According the demanding

Keyword:

Tungsten Copper alloy

90WCu sheet

tungsten switch contact Tungsten copper electrodes

Tungsten copper heat sinks

tungs

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