Ansteel Co., Ltd. applied for a patent for “a steel plate for underwater hydrogen transmission pipelines and its manufacturing method”
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According to news from August 23, 2025, **information from the Intellectual Property Office shows that Ansteel Co., Ltd. has filed a patent application titled “A steel plate for underwater hydrogen transmission pipelines and its manufacturing method,” with the publication number CN120519770A; the application was submitted in July 2025. The patent abstract indicates that this invention relates to the field of pipeline steel production, and in particular to a steel plate for underwater hydrogen transmission pipelines and its manufacturing method. The chemical composition of the steel plate is as follows: C: 0.04%～0.06%, Si: 0.15%～0.25%, Mn: 1.05%～1.25%, Ti: 0.01%～0.03%, Nb: 0.02%～0.04%, V: 0.03%～0.05%, with Nb+V+Ti equaling 0.068%～0.105% ； As: 0.02%～0.04%, P≤0.012%, S≤0.003%, with the remainder being Fe and impurities. The chemical composition of the steel plate is designed with low carbon and low manganese levels as a basis; elements such as Nb, V, and Ti are used for micro-alloying to ensure the material’s strength. The content of harmful elements in the steel is strictly controlled, and appropriate manufacturing processes are employed to produce steel plates suitable for pipeline use, whose properties fully meet the requirements for hydrogen transport in underwater environments.
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