STA top qulity tungsten filament/wire  with factory price   

Tungsten filament is the essential part in bulbs, such as halogen bulbs and vacuum bulbs. Tungsten is an element that is used in the creation of light bulb filaments. There are several different types of light bulbs on the market that utilize tungsten filaments in their construction.

Tungsten filament can be made in lots of shapes, such as coiling, horizontal helix, and vertical helix, and so on. It can be made according to customers’ requirements. If you have any idea, please do not hesitate to tell us

Products Characteristic and features

Melting Point: 3410 Ceiclus

Boiling Point:5927 Ceiclus

Density: 19.2g/cm3

Diameter: 0.01-2.00mm

Grade:W, WRe, WT20, MoW, WVM, WVMT10

Type: black and cleaned

Quality standard:GB/T 4181-1997(Tungsten Wire) ASTM B760-86

Specific electrical: 0.055 Ohm x mm2/m resistance at 20 ceiclus.
Modulus of elasticity: 410 kN/mm2, at 20 ceiclus

1.Excellent Conductivity

2.Resistence of high temperature.

3.Abrasion and Erosion.

4.Suitable for making heating wires.

5.Twisted wires for coating films under vacuum and for tungsten wires in electrical light sources usage.

Dimensions and Tolerances of tungsten wire

Tungsten wires diameters are generally expressed in terms of inches or mils (thousandths of an inch). For thin wires from .001 inches up to .020 inches in diameter, the diameter of the wire is measured by weight per unit length. That is, the weight expressed in mg of a 200 mm length of wire.

The standard diameter tolerance is ± 3% of the weight measurement. Closer tolerances are available, depending upon the application for the wire product.

 Specifications of tungsten  wire

if you have special requirment,please tell us at any time

Application:

   Tungsten is widely used as refractory metals. In wire form, tungsten wire is essential for the production of lighting products and other goods where its high temperature properties are of use. Among its properties are a melting point of 3410° C, a low coefficient of thermal expansion and low vapor pressure at elevated temperatures along with good electrical and thermal conductivity.

The important applications of tungsten wire are for the production of coiled incandescent lamp filaments, cathode and support structures for power tubes, heating elements for high temperature furnaces and evaporation sources in metallizing processes. Thicker sizes of tungsten wire, straightened, finish-ground and cut into rod pieces are widely used for glass-to-metal seal lead parts in the lighting and electronic industries.

   Tungsten Filament is not only widely used as high temperature lamp filament, stock-resistance filament, doubles helix filament, electric incandescent lamp filament, and fluorescent light filament, but also used as tungsten heater element and other heater components in semiconductor. The reason is that tungsten has high melting point, and it is so inactive that it is difficult to react with other gases.