日本神户制钢公司制成了一种具有良好耐腐蚀性的新型热轧钢板。该钢板厚23ｍｍ,屈服强度为333ＭＰａ,抗拉强度为451ＭＰａ,扩孔比为160%。试验结果表明,这种钢板的点腐蚀率和焊接热影响区的腐蚀率均比同一强度级的原用ＳＡＰＨ45型钢板下降50%左右,而且抗疲劳强度比原用钢... Kobe Steel made a new type of hot-rolled steel with good corrosion resistance. The steel plate is 23 mm thick, has a yield strength of 333 MPa, a tensile strength of 451 MPa and a reaming ratio of 160%. The test results show that the corrosion rate of the steel and the heat affected zone corrosion rate than the same strength of the original SAPH45 steel plate down about 50%, and the anti-fatigue strength than the original steel ...