Preprints of the National Meeting of JWS
Preprints of the National Meeting of JWS
Session ID : 308
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Host: Japan Welding Society

Influences of P and S on Hot Cracking of Extra High-Purity 25Cr-35Ni Stainless Steel
Weldability of Ultra High-Purity Corrosion-Resistant Alloys (Part 6)
*Kazuyoshi Saida, Yasushi Nishijima, Hiroyuki Ogiwara, Kazutoshi Nishimoto, Kiyoshi Kiuchi, Junpei Nakayama
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Keywords: Extra high-purity stainless steel, Impurity elements, Ductility-dip cracking, Grain boundary segregation, Molecular orbital analysis
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Abstract
The hot cracks occurred in extra high-purity 25Cr-35Ni stainless steel was mainly characterised as ductility-dip crack. The amount of P+1.2S in steels should be limited to 45ppm in order to obtain the extremely low ductility-dip cracking susceptibility in 25Cr-35Ni stainless steels.
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© 2011 by Japan Welding Society
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