An alloy of tungsten.An additive that significantly increases hardness and strength at elevated temperatures.Used for high-speed steel, strong bites, and drills.Tungsten is used in cemented carbide tools mainly in the form of carbides (WC) due to its properties such as hardness at high temperatures and retention of heat resistance.Tungsten reserves are said to be about 7 million tons worldwide, of which China accounts for 57%, or 83% in terms of production volume.Japan's tungsten demand is 100% dependent on imports, ranging from intermediate raw materials such as WO3 (tungsten trioxide), APT (ammonium paratungstate), and ferrotungsten to tungsten carbide and tungsten metal in various forms. In particular, the production of APT (ammonium para-tungstate) is now monopolized by China, and the largest amount of APT is imported to Japan.It is revised once a week after hearing from handling companies, trading companies, traders, and users.