The welding usability,the chemical composition and mechanical properties of deposited metal, the mechanical properties of weld joints for SA-335P92 electrode E9015-B92 and E9016-B92 were studied in this paper. The results show that the whole welding usability of the electrode E9015-B92 and E9016-B92 were good and could meet welding requirements for products. The system of alloy chemical composition in deposited metal was consistent with the well-known foreign manufacturers and the main alloy elements can meet the requirement of ASME standard. The chemical composition and mechanical properties of deposited metal and weld joints could meet the requirement of standard. But alloy elements in deposited metal were almost entirely from the coating of electrode,the homogeneity and stability of main alloy elements need to be well improved. In addition,compared with E9015-B92,the impact toughness of the electrode E9016-B92 was better,and the impact toughness of the electrode E9015-B92 was strongly affected by the preservation time of PWHT.A reasonable specification for heat treatment need to be developed.