| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.40 ( May 1999 ) Steinless Steel and Steel Platel ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of Ti-bearing High Performance
Ferritic Stainless Steels R430XT and RSX-1 Yoshihiro Yazawa, Yasushi Kato, Makoto Kobayashi |
| Synopsis: In order to develop high performance ferritic stainless steels which would exceed conventional high purity ones, the effects of alloying elements and production processes on the properties of the steels were investigated. The investigation results revealed that reduction of carbon to the utmost level and the adjustment of nitrogen content to remain at a proper level provided the steels with both high r-value and a good ridging property when Ti was added as a stabilizer. Further, the addition of Mo was especially effective in improving corrosion resistance of the steel under cyclic corrosive condition such as an exposure in the field. Based on the above results and by extensively optimizing the production processes, Ti-bearing high performance ferritic stainless steels, "River Lite 430XT (ultra low C, low N-16%Cr-Ti) and River Lite SX-1 (ultra low C, low N-18%Cr-1.5%Mo-Ti)", have been developed. |
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