SpetsMetallMaster Group of Companies Limited Liability Company (official abbreviated name LLC GK SMM) is one of the leading Russian enterprises in the market of refractory metals - molybdenum, tantalum, tungsten, vanadium, niobium, rhenium, zirconium, hafnium. SMM Group is engaged in the development and production of products from refractory and rare earth metals and their alloys and supplies its products both to the Russian market, where the main consumers are defense industry enterprises, and ...