��Qinhuang dao ao tong CO.,LIMITED (Ao tong for short) is located in QinHuangDAO city, Aotong STEEL is one of the largest joint company in Chinese steel market who specialized in processing steel ,domestic and overseas marketing steel since 2004 Our company is the largest contracted company of joint steel manufacturer HBIS Group in China. Else, AOTong STEEL owned tens of stock warehouses in mainly port cities, two processing plants providing welding and cutting plates and one large per-treatment plant in Shanghai which provides shoting,blasting and painting services for preventing rusty. ��Our main products include High strength structural plates, Boiler and Pressure vessel plates, Shipbuilding plates,pipeline steels and so on according to GB,ASTM,ASME,JIS,NF,DIN,EN,API,BS,ISO.All the ship plates has got nine society classification certificated as ABS��V��R��L, DNV��INA��K, CCS��R. Engineers from R&D are charging with our technical advantage and all of our steel products have been approved by TUV,CE,DNV and ISO 9001:2000 system.These high quality plates have been used in main body frame of Bird's Nest during 2008 Olympic Games, Three Gorges and Manned Space Flight and other national key projects. Our Main products as blew Carbon steel plate ASTM ASME A36,A283/A283M (S)A283GrA,(S)A283GrB,(S)A283GrC,(S)A283GrDEN10025 ,S235JR,S235J0,S235J2DIN 17100 St33,St37-2,Ust37-2,RSt37-2,St37-3StE255,WstE255,TstE255,EstE255JIS G3106 SS330,SS400,SS490,SS540SM400A,SM400B,SM400CGB Q235A,Q235B,Q235C,Q235D,Q235EBoiler plate A516/A516M (S)A516Gr55,(S)A516Gr60,(S)A516Gr65,(S) A516Gr70A515/A515M (S)A515Gr55,(S)A515Gr60,(S)A515Gr65,(S) A515Gr70A537/A537M (S)A537CL1, (S)A537CL2, (S)A537CL3A204/A204M A204GrA,A204GrB,A204GrCA387/A387M SA387Gr11CL1,SA387Gr11CL2,SA387Gr12CL1,SA387Gr12CL2,SA387Gr22CL1,SA387Gr22CL2(HIC)A299/A299M SA299GrA,SA299GrBA285/A285M A285GrA,A285GrB,A285GrCA533/A533M SA533GrACL1/CL2/CL3/CL4,SA533GrBA203/A203M SA203GrE,SA2
