Shenyang TongDe Nitriding Import & Export Co. Limited is an incorporated company in Shenyang, Liaoning, China. The company is specializing in developing nitriding surface of metallurgical parts, shafts, engine valves etc. The company has been sucssefully nitriding various type mechanical parts to over 40 clients in Shenyang, Changchun city in northeast China. The company has fulfill technique development in following nitriding product lines: - Japanese engine intake and exhaust valves; - Engine crankshafts; - all type of shafts; - Gears; - Bearing (exported to U. S. A); - Mould nitriding (exported to Japan) The Company developed its own nitriding technoilogies, nitriding various type and content of metallurgical alloys: - 40Cr; - 40CrMo; - 21-4N - 4Cr9-10Si2Mo; - 0Cr19Ni10; 1Cr18Ni10Ti - 38CrMoAl; The Company has its own factory in produce and sales of nitriding salts, which is graded as world advanced level. Thhe company represent its Chinese partners in prividing export sales of precise mechanical parts, valves saltsetc. Nitrided relevant service and products.