In this study,the welding technology of the hot-rolled extra-high-strength steel,BS960QC,has been comprehensively investigated.Analysis has been made on the weldability,the different welding procedures,the mechanical properties,and the fatigue properties,and a set of recommendation guidelines have been proposed for evaluating the welded joints of the extra-high-strength steel.The research and results indicate that the hot-rolled extra-high-strength steel,BS960QC,has good weldability and an excellent adaptability to welding procedures.Further,the excellent mechanical properties and fatigue properties of the welded joints,which can be achieved by using optimized welding procedures,can completely meet the technical requirements of the construction machinery industry.
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