Rm.2009,20th Floor,Unit C,Yuhong Plaza,No. 61 Zijingshan Road,Zhengzhou,China
Home ProductsTungsten Copper Alloy

Low Thermal Expansion Polished Tungsten Copper Alloy

China Zhengzhou Sanhui Refractory Metal Co., Ltd. certification
China Zhengzhou Sanhui Refractory Metal Co., Ltd. certification
Zhengzhou Sanhui is professional partner with excellent quality and warm service.

—— James

We appreciate your long term cooperation with quality assurance and timely delivery.And thanks alot for your kind support through 2020.

—— Bob

I'm Online Chat Now

Low Thermal Expansion Polished Tungsten Copper Alloy

small.img.alt small.img.alt

Large Image :  Low Thermal Expansion Polished Tungsten Copper Alloy

Product Details:
Place of Origin: China
Brand Name: SANHUI
Certification: ISO9001
Model Number: Customized
Payment & Shipping Terms:
Minimum Order Quantity: 10 Kilograms
Price: Negotiable
Packaging Details: Exported plywood case with foam inside
Delivery Time: 20 days after order
Payment Terms: T/T
Supply Ability: 5000 kilograms per month
Detailed Product Description
Material: Tungsten Copper Alloy Application: Electrical Contacts
Shape: Customized Dimensions: Customized
Surface: Polished Standard: ASTM
High Light:

superconductive copper tungsten alloy


polished tungsten copper alloy

 Low Thermal Expansion Polished Tungsten Copper Alloy


Tungsten Copper Alloy Introduction:

W80/Cu20 Polished tungsten copper is used for arcing contacts in SF6 circuit breakers for ultra high, high and medium voltage applications. At the heart of the switching chamber, WCu contacts are exposed to extreme mechanical and thermal loads: When the circuit is opened and closed, the arc starts directly at the switch contacts at a temperature of up to 20 000 °C.


W80/Cu20 Polished tungsten copper is popular because of its combination of unique material properties. Ahigh level of temperature resistance is one of the most important advantages of tungsten, while the copper content increases the electrical and thermal conductivity. Contact materials made of WCu are also characterized by the following properties:

  • Good electrical conductivity
  • Excellent strength
  • Very good machinability
  • Good thermal conductivity
  • Low thermal expansion
  • High arc erosion resis

Specification of Tungsten Copper Alloy

Product Name Low Thermal Expansion Polished Tungsten Copper Alloy
Material Tungsten copper alloy
Surface Polished
Dimensions Customized
Application Electrical Contacts



The Parameter of Low Thermal Expansion Polished Tungsten Copper Alloy:

Code No. Chemical Composition % Mechanical properties
CU Impurity W Density   RES( cm)    
(g/cm3 ) Hardness Conductivity TRS/ Mpa
  HB IACS/ %  
CuW(50) 50+2.0 0.5 Balance 11.85 115 3.2 54  
CuW(55) 45+2.0 0.5 Balance 12.3 125 3.5 49  
CuW(60) 40+2.0 0.5 Balance 12.75 140 3.7 47  
CuW(65) 35+2.0 0.5 Balance 13.3 155 3.9 44  
CuW(70) 30+2.0 0.5 Balance 13.8 175 4.1 42 790
CuW(75) 25+2.0 0.5 Balance 14.5 195 4.5 38 885
CuW(80) 20+2.0 0.5 Balance 15.15 220 5 34 980
CuW(85) 15+2.0 0.5 Balance 15.9 240 5.7 30 1080
CuW(90) 10+2.0 0.5 Balance 16.75 260 6.5 27 1160

No arc erosion: With the right mix of materials.





By choosing the right mixture of tungsten and copper, we are able to influence the product's arc erosion properties. At a tungsten content of 80 %, we achieve the lowest arc erosion rates. Depending on the voltage and current intensity as well as on economic considerations, we can vary the tungsten content between 60 and 90 % to meet the exact needs of your application.


Good conductivity: High density makes it possible.

The denser the material, the better it is at conducting electricity and heat. One trick for producing WCu in higher densities is to add nickel during the sintering process. However, too much nickel has a negative influence on the conductivity of the material. Take advantage of our employees' experience and benefit from an optimum balance between material density and conductivity.

Content-of-Nickel.jpg Density_Sintering_time.jpg



Greater endurance: With a well defined grain structure.

FG20 A20NiF A20Ni  
FG20.jpg AK20NiF.jpg AK20Ni.jpg bar.jpg200 µm

The higher the applied voltage is, the more resistant to arc erosion the contact material must be. SANHUI is able to modify the arc erosion resistance of WCu by varying the grain size of its tungsten. For particularly high voltage ranges, we use materials with an extremely fine grain size.




Product picture:


Low Thermal Expansion Polished Tungsten Copper Alloy 7 

Contact Details
Zhengzhou Sanhui Refractory Metal Co., Ltd.

Contact Person: Lisa Ma

Tel: 86-15036139126

Send your inquiry directly to us (0 / 3000)

Request A Quote

E-Mail | Sitemap

Privacy Policy China Good Quality Molybdenum Products Supplier. © 2020 - 2022 machining-molybdenum.com. All Rights Reserved.