WELDING PROCESS OF BUILDING HIGH-PERFORMANCE STRUCTURAL STEEL Q550GJC

High performance structural steel features high strength，good ductility and material-saving，which has a superior performance and remarkable economic benefits，it is getting more popularization and application in tall and large span buildings as well as highway bridges． Developed by WISCO Q550GJC is a new type of building high performance structural steel． So far，it has not been applied in the field of domestic construction steel structure． On the basis of the research in necessary test such as steel weldability and the selection of welding material，it was qualified and summarized the WPS of Q550GJC including SAW，SMAW，GMAW and FCAW，which could meet the requirements of national standard Code for Welding of Steel Structures GB506612011． The WPS provided the beneficial reference for the future engineering application and the development of relevant standards．