Chemical Formula: W
Atomic Number: 74
Atomic Weight: 183.84
Category: Transition Metal
Tungsten (also known as Wolfram) was first identified in the 18th century, but came to importance in during World War II due to its importance in the ammunitions industry. Today, tungsten concentrate is produced from wolframite (iron-manganese tungstate; FeWO4/MnWO4), scheelite (CaWO4), ferberite (FeWO4) and hubnerite (MnWO4). China produces 75% of the world’s tungsten concentrate, while Austria, Boliva, Portugal and Russia produce most of the remaining amount.
Tungsten Rhenium Thermocouples
Tungsten-Rhenium thermocouple assemblies produced and developed by SMI Ltd.’s engineers permit ultra-high temperature measurements far in excess of conventional ISA standard letter designated thermocouples. Traditional base metal thermocouple technology can be used to measure temperatures to approximately 1200°C. For higher temperature requirements the no...
WKL – Potassium Doped
WKL material is tungsten doped with ppm levels of potassium (K), aluminium (Al), silicon (Si) and is also produced principally as rod and wire. Compare with WKM, WKL wires have much longer longitudinal grain structure, which means much higher L/W value (grain length ratio grain width). According to produce processes, WKL wires find two main applications. One...
High Purity Tungsten
High purity tungsten is used in the electronics industry because of its high resistance to electron migration, high temperature stability and tendency to form stable silicides. Tungsten metal is also used in many other high temperature applications, such as light bulb, cathode ray and vacuum tube filaments, heating elements and rocket engine nozzles. Due to ...