Publication number: 20170130305
Abstract: The invention relates to a duplex ferritic austenitic stainless steel having high formability utilizing the TRIP effect and high corrosion resistance with the high pitting resistance equivalent. The duplex stainless steel contains less than 0,04 weight % carbon, 0,2-0,8 weight % silicon, 0,3-2,0 weight % manganese, 4,0-19,0 weight % chromium, 2,0-5,0 weight % nickel, 4,0-7,0 weight % molybdenum, less than 4,5 weight % tungsten, 0,1-1,5 weight % copper, 0,14-0,23 weight % nitrogen, the rest being iron and inevitable impurities occurring in stainless steels. Further, the co-effect of the chromium, molybdenum and tungsten contents in weight % is in the range of 20<(Cr+Mo+0,5 W)<23,5, where the ratio Cr/(Mo+0,5W) is in the range of 2-4,75.
Type:
Application
Filed:
June 11, 2015
Publication date:
May 11, 2017
Applicant:
Outokumpu Oyj
Inventors:
James Oliver, Jan Y. Jonsson