| 摘要 |
This invention relates to steel of high corrosion resistance and workability, and more particularly to steel having high corrosion resistance and workability used in an exhaust system of an internal combustion engine for, for example, an automobile or a ship. Steel of a high corrosion resistance and steel of high corrosion resistance and processability in which not less than 0.01 % and less than 1.2% of Si, 0.1-1.5 % of Mn, 2.5-9.9 % of Cr and more than 3.0 % and up to 8.0 % of Al are contained; C, P, S and N are reduced to not more than 0.02%, not more than 0.03 %, not more than 0.01 % and not more than 0.02 % respectively; a total of 0.01-0.5 % of a combination of Nb, V, Ti, Zr, Ta and Hf is contained; a condition expression is satisfied; not less than one kind of element out of Cu, Mo, Sb, Ni, W, rare earth elements and Ca is contained; and the rest consists of Fe and unavoidable impurities. |
