| 摘要 |
The present invention is a stainless steel material that has a chemical composition obtained from C: less than 0.05%, Si: 4.0-7.0%, Mn: not more than 1.50%, P: not more than 0.030%, S: not more than 0.030%, Cr: 10.0-20.0%, Ni: 11.0-17.0%, Cu: 0.15-1.5%, Mo: 0.15-1.5%, Nb: 0.5-1.2%, Sol. Al: 0-0.10%, Mg: 0-0.01%, the remainder being obtained from Fe and impurities, and in which the area ratio of MgO∙Al2O3 inclusions is not more than 0.02%. This stainless steel material not only has excellent corrosion resistance to high concentration sulfuric acid of, for example, 93-99% at high temperature but also is economical. |
