Pure tungsten is a hard metal from steel gray to tin white. Very pure tungsten can be sawn by a pull saw (pure tungsten is very brittle and difficult to process). The processing methods of tungsten include forging, stretching and impact. Among all metals, tungsten has a relatively high melting point of 3422 ° C, low vapor pressure and high tensile strength (at 1650 ° C). Its anti-corrosion performance is very good, and most inorganic acids have little erosion on it. In the air, it forms a protective oxide on its surface, but it will be completely oxidized at high temperature. Adding a small amount of tungsten into steel can greatly increase the hardness of steel.
Pure tungsten has high melting point, high temperature strength, creep resistance, good thermal conductivity, conductivity and electron emission properties, large specific gravity, low coefficient of expansion and low metal vapor pressure.
Executive standard: GB / T 4187-2017
Tungsten content: > 99.95%
Density: 19.3g/cm3
Melting point (liquid): 3422 ° C
Conductivity: 30% IACS min
Hardness: 69hra
Use of pure tungsten:
It is commonly used in high temperature environment parts such as pure tungsten electrode, support line, lead-in line, printer needle, various electrodes and quartz furnace, filament, high-speed tools, automotive automatic products, sputtering target and so on.
