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。

The invention disclose high-anticorrosion low alloy steel suitable for the high-temperature littoral environment, and belongs to the field of metal materials. The low alloy steel comprises chemical components including, by weight percent, not larger than 0.07% of C, 0.20% to 0.35% of Si, 1.0% to 1.2% of Mn, not larger than 0.030% of P, 0.004% to 0.012% of S, 0.4% to 1.0% of Cu, 3.0% to 3.5% of Ni, 0.1% to 0.2% of Mo, not larger than 0.020% of Ti and the balance Fe. Through control over the weight percent of all components in the steel, the steel can achieve the best high temperature littoral environment corrosion resistance property, and meanwhile, the low production cost can be maintained. The manufactured material is subject to the 720-hour salt-spray corrosion test according to the ASTM B117 standard, the corrosion rate does not exceed 0.041mm/a, the 12-month corrosion thickness losing of a hanging piece does not exceed 31 microns, the steel is obviously superior to Q235 carbon steel, the excellent high temperature littoral environment corrosion resistance property is achieved, and the steel is widely suitable for steel facilities of the coastal areas.