Tungsten Needles High Purity W Precision Metal Components For High Temperature Electrical Scientific And Industrial Applications

Product details

Tungsten needles are precision components in the form of needles, made from high-purity metallic tungsten or tungsten alloys. Due to the high melting point, high strength, excellent electrical conductivity, and corrosion resistance of tungsten, they are widely used in various industrial and scientific research fields. The following provides a detailed introduction from four dimensions: core characteristics, classification and specifications, production process, and typical applications: 1. Core Characteristics: Key advantages determining application scenarios The performance of tungsten needles is entirely dependent on the inherent properties of tungsten metal, combined with the precise requirements of the "needle-like" shape, resulting in the following core advantages: Extremely high heat resistance: The melting point of tungsten is as high as that of the metal with the highest melting point in nature, and tungsten needles can maintain structural stability at temperatures above , remaining unsoftened and undistorted, especially suitable for high-temperature electric arcs, high-temperature detection, etc. Excellent mechanical strength: At room temperature, the hardness of tungsten is approximately , and it still maintains high strength at high temperatures (with tensile strength above MPa at ), avoiding the breakage and wear of tungsten needles under high-frequency electric arc impact or mechanical contact. High electrical conductivity and thermoelectric properties: The electrical conductivity of tungsten is approximately , and it also has good thermoelectric stability, suitable for use as current transmission electrodes; at the same time, its low thermal expansion coefficient can reduce dimensional errors caused by temperature changes, ensuring positioning accuracy in precise applications. Strong corrosion resistance and chemical inertness: Tungsten does not react with air or water at room temperature, and has excellent corrosion resistance to acids (except for the mixture of hydrofluoric acid and concentrated nitric acid) and alkaline solutions, as well as most molten metals (such as aluminum, copper, and iron), and can be used in harsh chemical environments for a long time. Low vapor pressure and high purity characteristics: At high temperatures, the vapor pressure of tungsten is extremely low, only , reducing volatile pollution; high-purity tungsten needles (with a purity of above ) can avoid interference from impurity ions and meet the purity-sensitive scenarios such as semiconductors and medical applications.

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