Made up mostly of tungsten carbide (WC) fragments bonded with a metal binder, such as cobalt, cemented carbide combines the strength of tungsten with the strength of other steels. The structure of cemented carbides can be customized to fit details applications, leading to the manufacturing of varieties like YG6, yg20, http://wiki.gta-zona.ru/index.php?title=vangsgaardwren0771