♦ 1963, TANGSAW was set up and first hot-cutting circular saw blade was produced to replace the imported products.
♦ 1972, TANGSAW developed and produced first cold-cutting circular saw blade in China.
♦ 1984, TANGSAW developed and produced HSS segmental circular saw blade to replace the German made products in order to satisfy the requirement of BAOSTEEL.
♦ 1987, TANGSAW developed and produced first diamond steel core in China.
♦ 1991, TANGSAW imported Germany technology and production equipments, to produce first large size TCT circular saw blades for steel cutting in China.
♦ 1992, TANGSAW imported Japanese fully automatic heat-treatment production line. This set of heat treatment equipment represents the world's most advanced technology of heat treatment for the circular saw blades, even until now, it is still the only import production line in china.
♦ 1998, TANGSAW produced large size high speed cold-cutting circular saw blade for cutting hot rolling H beam.
♦ 2001, TANGSAW passed the ISO9001:2000 quality management system and become the first enterprise with this certification in the saw blade industry in China.
♦ 2002, TANGSAW developed and produced large size ultra-thin diamond steel core in China.
♦ 2003, TANGSAW developed cold-cutting circular saw blades for cutting large cold-formed beams.
♦ 2004, TANGSAW developed special TCT circular saw blades for cutting aluminium.
♦ 2004, TANGSAW was affirmed as the provincial high-tech enterprises in Hebei Province.
♦ 2005, TANGSAW developed and produced orbital cutting TCT circular saw blades.
♦ 2005, TANGSAW revised the National Industrial Standard for Metal Hot-cutting Circular Saw Blades, with implementation in the same year.
♦ 2007, TANGSAW developed power-saving metal hot and cold-cutting circular saw blades and promoted to the H-beam mills both domestically and abroad.
♦ 2008, TANGSAW developed special TCT circular saw blades for cutting oil pipes and tubes.
♦ 2008, TANGSAW was affirmed as the national high-tech enterprises in China.
♦ 2009, TANGSAW, worked together with University of Science &Technology Beijing, to develop and approve the National Industrial Standards of Metallurgical Metal Cold-cutting Circular Saw Blades and Metallurgical TCT Circular Saw Blades.
♦ 2009, TANGSAW passed the ISO14000 environmental management system.
♦ 2010, TANGSAW won the title of Hebei Famous Brand.
♦ 2010, TANGSAW set up fully owned subsidiary company ISP&T in Dortmund, Germany.
♦ 2011, TANGSAW won the first prize of Tangshan Scientific and Technological Progress, as well as third prize of Hebei Science and Technology Progress.
♦ 2012, TANGSAW was re-affirmed as the national high-tech enterprises in China.
♦ 2012, TANGSAW developed Power-saving Push-type Pipe-cutting Circular Saw Blades, new Power- saving Silent Diamond Steel Core and Ultra-thin Flying TCT Cutoff, won the Provincial New Product Appraisal.
♦ 2012, TANGSAW won the honorary title of Tangshan "2012 Excellent Enterprise of Science and Technology Innovation”.
♦ 2012, TANGSAW was commissioned by the National Ministry of Industry and Information Technology, to revise the National Industry Standards of Metallurgical Metal Hot-cutting Circular Saw Blade and Metallurgical Metal Ceramic Tipped Circular Saw Blade.
♦ 2012, TANGSAW set up fully owned subsidiary Stego Saws Inc. in Pittsburgh, USA.
♦ 2013, TANSAW developed the Screwed TCT Circular Saw Blades and won the Provincial New Product Appraisal .
♦ 2013, TANGSAW was re-affirmed with the title of Hebei Famous Brand.
♦ 2013, TANGSAW was affirmed the Hebei Innovation Technology Enterprise .
♦ 2014, TANGSAW’s trademark YENIU was recognized as Chinese Famous Trademark .