六十年代,日本钢产量以年平均15％的增长率高速向前推进,1970年钢产量已达9332万吨,成为与美、苏并驾齐驱的钢铁大国。后十年中,日本钢铁在继续保持产量增长的同时,又以新品种和高质量显示出自己的特色,在国际市场赢得了声誉。日本的抗层状撕裂性能良好的Z向钢,高效率焊接的大输入热用钢 In the 1960s, Japan’s steel output advanced at an average annual growth rate of 15%. In 1970, the steel output reached 93.32 million tons, becoming a steel power that kept pace with the United States and the Soviet Union. In the latter ten years, while continuing to maintain its output growth, Nippon Steel has also demonstrated its own characteristics with new varieties and high quality and gained a reputation in the international market. Japan’s anti-layered tear good Z-direction steel, high-efficiency welding of large heat input steel