项目明确了高强度、大规格、易焊接海洋工程用钢强韧性尺寸效应、全流程氧化物夹杂演变规律、多场耦合海洋环境力学-电化学等多种因素交互作用机制，掌握了出高品质海工钢组织与性能均匀性调控关键技术，开发出特厚齿条钢、高级别大线能量焊接用海工钢、大规格耐低温H型钢、R6级系泊链圆钢等新型海工钢产品，形成了国家标准、行业标准、团体标准、船级社规范等多层次标准规范体系，在国产高端海洋工程装备上批量应用新型海工钢共16.80万吨，发表学术论文130余篇，其中SCI英文论文84篇，出版专著2本，申请发明专利41项，其中授权16项，完成新产品鉴定3项，获得省部级科技进步奖3项，培养毕业研究生51名。

The project has clarified the interaction mechanisms of high-strength, large-size, easy-welding offshore steels including dimensional effects of strength and toughness, oxide inclusions evolution during the complete process, multi-field coupling marine environment mechanics - electrochemistry and other factors. Moreover, the project has mastered the key technologies of controlling the microstructure and performance uniformity of high-quality offshore steels, developed extra-thick rack steel, high-grade large heat input welding offshore steel, large-size low-temperature tough H-beam, R6 grade mooring chain steel and other new offshore steel products. It has formed a multi-level standard specification system including national standards, industry standards, group standards and classification society specifications, etc. It has applied a total of 16.8 million tons of new offshore steels in batch on domestic high-performance offshore engineering equipments, published around 130 academic papers, including 84 SCI English papers, published 2 monographs, applied for 41 invention patents, of which 16 were granted, and completed 3 new product identifications. The company has applied for 41 invention patents, of which 16 were granted, completed 3 new product appraisals, won 3 Provincial and Ministerial Science and Technology Progress Awards, and trained 51 graduate students.