Tungsten Wire

Tungsten Wire

Standard: ASTM B760-86
Material: W >99.95%
Specific electrical: 0.055 Ohm x mm2/m resistance at 20 °C.
Modulus of elasticity: 410 kN/mm2, at 20 °C.

Tungsten Wire Applications

Tungsten wire is universally used to make tungsten wire resistance for bulbs, lamps. It can also be used to make optical instruments, electric vacuum components, and high-temperature resistant parts. Tungsten wire is characterized by the highest melting point and excellent electric conductivity. It has a high-performance in sintering and high-temperature in recrystallization. For the above features, it can serve a long life in many applications.

Dimensions and Tolerances of Tungsten Wire

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

Straightness of Tungsten Wire

The wire may be finished in the unstraightened or as the drawn condition. The wire can also be straightened via mechanical or heat-treating processes. Typically, the measure of the straightness of a tungsten wire is obtained by cutting a ten inch long piece of wire and allowing it to lie on a flat, clean surface. The maximum deviation from a straight line along its length is the quantitative measure of its straightness. In general, as the degree of straightness increases, tensile strength decreases.

Quality and Finish of Tungsten Wire

The wire is free of scratches, kinks, and distortions because they are harmful to the product's intended end-use. Surface finish is supplied in the black, as drawn condition, where drawing lubricants and oxides are retained on the surface or in the cleaned condition by firing in hydrogen or electrochemical etching.

Tungsten Wire Spooling

The wire is free of scratches, kinks, and distortions because they are harmful to the product's intended end-use. Surface finish is supplied in the black, as drawn condition, where drawing lubricants and oxides are retained on the surface or in the cleaned condition by firing in hydrogen or electrochemical etching.

Tungsten Wire Specifications

Diameter (um)	Length (m)	Tolerance Weight (mg/200mm)			Tolerance Dia. (mm)
10<d<=18	>0.30-1	—	±3	±4	—	—
18<d<=40	>1-5	±2	±2.5	±3	—	—
40<d<=80	>5-19	±1.5	±2.0	±2.5	—	—
80<d<=150	>19-68	±1.0	±1.5	±2.0	—	—
150<d<=300	>68-273	±1.0	±1.5	±2.0	—	—
300<d<=350	>273-372	—	±1.0	±1.5	—	—
350<d<=500	—				±1.5	±2.0
500<d<=1800	—				±1.0	±1.5

Gold-Plated Tungsten Wire

The most popular and legitimate application for gold-plated tungsten is as a corona discharge wire used to produce controlled electrical discharges in filtration and printing, as well as a variety of other processes.

The Data of Gold-Plated Tungsten Wire

Diameter	0.02 – 0.2 mm
Tensile Strength	56g/mg/200mm
Gold-Plated Layer	≥99.99%
Tungsten Content in The Core	≥99.92%
Thickness of The Gold-Plated Layer	0.3 um ± 10%
Corrosion Resistance	Soaked in concentrated nitric acid for 0.5 h at 80℃

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