DUPLEX STAINLESS STEEL
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United States of America Patent
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Feb 13, 2015
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Jun 16, 2006
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Abstract
The invention relates to a duplex stainless steel composition, the composition of which consists of, in % by weight:
- C≦0.05%21%≦Cr≦25%1%≦Ni≦2.95%0.16%≦N≦0.28%Mn≦2.0%Mo+W/2≦0.50%Mo≦0.45%W≦0.15%Si≦1.4%Al≦0.05%0.11%≦Cu≦0.50%S≦0.010%P≦0.040%Co≦0.5%REM≦0.1%V≦0.5%Ti≦0.1%Nb≦0.3%Mg≦0.1%the balance being iron and impurities resulting from the smelting, and the microstructure consisting of austenite and 35 to 65% ferrite by volume, the composition furthermore satisfying the following relationships:40≦IF≦70where
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