Duplex stainless steel superior in corrosion resistance of weld

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United States of America Patent

PATENT NO 9365914
APP PUB NO 20130343948A1
SERIAL NO

14004039

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Abstract

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A nitrogen-rich two-phase stainless steel that has corrosion resistance equal to that of standard type of two-phase stainless steel and is not susceptible to corrosion in a welding heat-affected part, wherein the austenite phase area ratio is 40-70%, the PI value expressed by formula (1) is 30-38, the NI value expressed by formula (2) is 100-140, and the γpre expressed by formula (3) is 1350-1450. (1) PI=Cr+3.3Mo+16N (2) NI=(Cr+Mo)/N.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATIONCHIYODA-KU TOKYO 100-0004

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Inoue, Hiroshige Tokyo, JP 43 382
Matsuhashi, Ryo Tokyo, JP 14 80
Oikawa, Yusuke Tokyo, JP 3 10
Tsuge, Shinji Tokyo, JP 19 128

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