Beijing Changhang Investment Casting Co., Ltd. is a high-tech enterprise engaged in specialized production of stainless steels, nonferrous metals, and high-temperature alloy investment castings. The company has already produced an accumulative total of several thousand types of products, and its main products include rough cobalt-based alloy artificial joints, cast non-allowance impellers, vanes and air-core vanes for aircrafts, trains and ships, as well as various high-temperature resistant, abrasion-proof and corrosion-resistant products, all of which are widely used in the fields such as medicine, aviation, space flight, metallurgy, chemical industry, construction and military industry.