Dunhua Zhengxing Abrasive Co., Ltd.which grew up from Mudanjiang Ningan Zhengxing Abrasive Co., Ltd. founded in 1987, renamed and moved to Dunhua city development zone in June 1999. Dunhua Zhengxing Abrasive, as one of the most important professional manufacturers of Boron Carbide in the world, can supply grain sizes according to the standards of FEPA (F4 to F1200), GB/T-2481-1998, JIS, ANSI, nuclear grades, and customer tailor-made specifications, and is certificated by ISO9001 in 2002, ISO14001 in 2004, and CMS testing management system. Yearly capacity is 5000 tons.