一种适用于高温滨海环境的高耐蚀低合金钢,属于金属材料领域。低合金钢的化学成分重量百分比为：C≤0.07％,Si 0.20％–0.35％,Mn 1.0％–1.2％,P≤0.030％,S 0.004％-0.012％,Cu 0.4％–1.0％,Ni 3.0％-3.5％,Mo 0.1％–0.2％,Ti≤0.020％,其余为Fe。本发明通过控制钢中各种成分的重量百分比来使钢达到最好的耐高温滨海环境腐蚀性能,同时维持在较低的生产成本。本发明制造的材料在按照ASTM B117标准进行720小时盐雾腐蚀试验后,其腐蚀速率不超过0.041mm/a；挂片12个月的腐蚀失厚不超过31微米,明显优于Q235碳钢,具有优异的耐高温滨海环境腐蚀性能,广泛适用于沿海领域的钢铁设施。

A highly corrosion-resistant low-alloy steel for high-temperature coastal environments, belonging to the field of metal materials. The chemical composition of the low-alloy steel is: C ≤ 0.07%, Si 0.20%-0.35%, Mn 1.0%-1.2%, P ≤ 0.030%, S 0.004%-0.012%, Cu 0.4%-1.0%, Ni 3.0%-3.5%, Mo 0.1%-0.2%, Ti ≤ 0.020%, the rest is Fe. The present invention controls the weight percentages of the various components in the steel to achieve the best possible resistance to corrosion in the high temperature coastal environment, while maintaining a low production cost. The corrosion rate of the material manufactured by the invention does not exceed 0.041mm/a after 720 hours of salt spray corrosion test according to ASTM B117; the corrosion loss thickness of the hanging piece does not exceed 31 microns for 12 months, which is significantly better than Q235 carbon steel, with excellent resistance to high temperature coastal environment corrosion performance, and widely applicable to steel facilities in coastal areas.