新日铁在世界上首次开发出耐盐腐蚀性能非常好的桥梁用耐大气腐蚀钢材（含Ni3％，不含Cr），井已上市。新产品可不经涂层而直接用于沿海地区。其初期费用比现有的、经过涂防腐层的钢材低10。而且，基本不需要桥梁维修费。日本计划在北陆新干线的桥梁（建设中）采用1000t新耐大 Nippon Steel has developed for the first time in the world corrosion resistance of bridges and weathering steel for bridges (including Ni3% and Cr-free) well. New products can be used directly in the coastal areas without coating. The initial cost is 10% lower than the current, coated steel. Moreover, there is little need for bridge maintenance fees. Japan plans to use Hokuriku Shinkansen bridge (under construction) with a new 1000t resistance