| 摘要 |
This invention relates to steel of a high corrosion resistance and a high processability, and more particularly to steel of a high corrosion resistance and a high processability for an exhaust system in an internal combustion engine for, for example, an automobile and a ship. Steel of a high corrosion resistance and a high processability containing not less than 0.01 % and less then 1.2 % of Si, 0.1-1.5 % of Mn, 5.5-9.9 % of Cr and 0.3-3.0 % of Al, capable of reducing the contents of C to not more than 0.02 %, P to not more than 0.03 %, S to not more than 0.01 % and N to not more than 0.02 %, containing 0.01-0.5 % in total of Nb, V, Ti, Zr, Ta and Hf, satisfying the following condition expression, and containing not less than one kind of Cu, Mo, Sb, Ni, W, rare earth elements and Ca, the rest consisting of Fe and unavoidable impurities. (Nb/93)+(V/51)+(Ti/48)+(Zr/91)+(Ta/181)+(Hf/179)-0.8x((C/12)+(N/14))>/=0. |
