Tungsten Wire Tungsten Filament for Vacuum Coating

Description:

The resistivity of tungsten wire is 5.3*10^-8. Tungsten has a high melting point, high resistivity, good strength, and low vapor pressure. It is the best material for making incandescent filaments among all pure metals. However, tungsten is hard and brittle and is difficult to process. When the current passes through the tungsten wire and is heated to a certain temperature, the resistance value of the tungsten wire also increases to a certain value (the resistance value of the general metal wire increases with the increase of temperature). At room temperature, the resistance of this object should be 1370℃-2000℃, but when the cross-sectional area and length of the tungsten wire change, this resistance value will change. In 1909, Kulich invented the processing technology of tungsten filament, which played a decisive role in the production and promotion of incandescent bulbs. Its basic principle has been used to this day.

Specifications:

Packing & Delivery:

To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.

Our inspection equipment:

FAQ:

Q: What information should I let you know if i want to get a quotation?

A: The required material dimension (Thickness*Width*Length,diameter*length; if possible, please kindly supply us drawings).
The required more information, such as Surface Condition, Tolerance Request, The Quantity, and other mechanical and technical details.

If it is possible, please also provide the application of products, we will recommend the most suitable products with details for confirmation.

Q: How do you gurantee the quality of the products?

A: Each step of production and finished products will be carried out inspection by QC department before storing in the warehouse. NG goods are not allowed in the completed goods warehouse.

Q: Can you guarantee the prompt delivery?

A: Yes, when we get your inquiries, not only we will evaluate the more competitive price, but also we can get the most reasonable delivery time. So the prompt delivery can be guaranteed.

Q: What is the shipping cost?

A: The shipping cost is determined by the destination port, weight, packing size, total CBM of the products, we will try best to get the most reasonable shipping cost from the forwarders or express couriers to help you save more money.

Q:What is the transportation way?
A:If the Gross Weight ≤45kg, it's better by express such as TNT, DHL, FedEx,, etc.
If the Gross Weight between 45kg to 100kg, by express or by air to your nearest airport can be both considered.
If the Gross Weight ≥ 100kg ,you can choose by Air or Sea to the nearest port.