日本川崎钢铁公司开发出一种桥梁用新产品,即耐盐特性优良的耐大气腐蚀厚钢板。这种钢板不经涂层就可以在海滨地区使用。新开发的桥梁用钢板是超低碳贝氏体型厚钢板,具有良好的焊接性能,同时由于镍含量增加到2.5%,故提高了耐盐特性。一般作为桥梁用的抗拉强度为400、490、570N/ Japan’s Kawasaki Steel has developed a bridge with new products, that is, excellent salt resistance atmospheric corrosion resistant steel plate. This steel plate can be used in the waterfront without coating. The newly developed bridge steel plate is an ultra-low carbon bainitic thick steel plate with good weldability and at the same time improved salt tolerance due to the nickel content increase of 2.5%. Generally used as a bridge with a tensile strength of 400,490,570 N /