Jiangsu Yongjin Metal Technology Co., Ltd. successfully filed a patent application on October 21, 2025, for a new invention titled "A High-Hardness, High-Nickel Stainless Steel Material and Its Preparation Method", under publication number CN120818658A. The application date was September 18, 2025.

The invention addresses the problem of insufficient hardness in high-nickel steel, which limits its use in high mechanical load and wear-resistant applications.

The method uses 304 stainless steel as the main raw material, adds electrolytic nickel plates, and then undergoes processes of hot rolling and solution treatment. The process includes laser cladding a high-hardness alloy layer and then laser shock strengthening the surface. This technique produces a high-nickel stainless steel capable of withstanding severe wear and high mechanical stress.