Coating-free corrosion resisting structural steel for tanker

• Main Authors: LIANG FENGRUI, SU HANG, YANG LI, LUO XIAOBING, YANG CAIFU, CHAI FENG, CHEN XUEHUI, LI JIAN, LI LI, ZHANG ZHENGYAN, SHI ZHONGRAN
• Format: Patent
• Language: Chinese; English
• Published: 19.04.2019
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses coating-free corrosion resisting structural steel for a tanker and belongs to the technical field of corrosion resisting steel. The problems that in the prior art, large-specification steel cannot meet requirements of corrosion resistance, matching with corrosion resistance of a base metal steel plate and mechanical performance. The coating-free corrosion resisting structural steel comprises, by mass, 0.01%-0.5% of C, 0.01%-2.5% of Si, 0.1%-2.5% of Mn, 0.01% or less of S, 0.03%-0.10% of P, 0.05%-2.5% of Ni, 0.05%-2.5% of Cu, 0.003%-2.0% of Cr, 0.003%-0.03% of Al, 0.01%-0.3% of V, at least one of 0.012%-0.03% of N, 0.0005%-0.2% of Ca, 0.0005%-0.2% of Mg, 0.0005%-0.2% of Sr, 0.0005%-0.2% of Hf and 0.0005%-0.2% of Ba, at least one of 0.005%-0.5% of Sn, 0.005%-0.5% of Sb and 0.005%-0.5% of Te and at least one of 0.0005%-0.3% of W, 0.0005%-0.3% of Mo and 0.0005%-0.3% of Co. The structural steel is suitable for manufacturing of a longitudinal structure in the tanker. 本发明公开了种油轮用免涂层耐蚀型钢，属于耐蚀钢技