PROCESS FOR MANUFACTURING HOT-ROLLED PLATE, STRIP OR COIL MADE OF DUPLEX STAINLESS STEEL
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United States of America Patent
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Issued Date -
Jul 25, 2019
app pub date -
Apr 1, 2019
filing date -
Apr 1, 2019
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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:
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