As various grades of 9Ni steel plate nickel-based alloyed welding material for LNG ship and tank, delivered by Pangang Jiangyou Changcheng Special Steel Co., Ltd. in many batches, was used in the research experiments and industrialized application, adding another star product to the product series of the company. The company had the technical capability to compete with foreign companies,greatly improving its reputation in special steel field. This also marks that the situation for China to build LNG tank by completely relying on imported welding materials will come to an end.