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抗大气腐蚀能力为碳钢四至七倍、屈服强度最低为8000磅/时~2以及各种机械性能良好综合平衡的低合金高强度钢系热轧机生产,其化学成分如下:.04%到.10%碳、.40%到1.80%锰、≤.03%硫、≥.015%铝、.90%到1.20%铬、.30%到.50%铜、.50%到1.20%硅、.10%到.15%砱、.015%到.04%铌以及.04%到.12%锆或全稀土与硫重量比至少为2.8∶.1的诸如铈和镧的稀土元素总量。在加工本钢成钢带或板时,要如此热轧以便终轧温度在 A_3和1700°F 之间、冷却速度为20°F/秒并在1100°F±100°F 下盘卷或堆放。
Atmospheric corrosion resistance of carbon steel four to seven times, the minimum yield strength of 8000 lb / h ~ 2 and a variety of good balance of mechanical properties of low alloy high strength steel hot-rolling mill production, the chemical composition is as follows: .04% to .10% carbon, .40% to 1.80% manganese, ≦ 0.03% sulfur,> 0.015% aluminum, .90% to 1.20% chromium, .30% to .50% copper, .50% to 1.20% .10% to .15% 砱, .015% to .04% niobium and .04% to .12% zirconium or total rare earth elements such as cerium and lanthanum in a total rare earth to sulfur weight ratio of at least 2.8: 1. When processing the billet into a strip or sheet, the hot strip is hot rolled so that the finish rolling temperature is between A_3 and 1700 ° F, the cooling rate is 20 ° F / sec and coiled or piled at 1100 ° F ± 100 ° F .