MARTENSITIC STAINLESS STEEL, PART MADE IN SAID STEEL AND METHOD FOR MANUFACTURING SAME
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United States of America Patent
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Issued Date -
Oct 6, 2016
app pub date -
Nov 25, 2014
filing date -
Nov 25, 2013
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Abstract
A martensitic stainless steel is provided, wherein its composition is:
- trace amounts≦C≦0.030%;trace amounts≦Si≦0.25%;trace amounts≦Mn≦0.25%;trace amounts≦S≦0.020%;trace amounts≦P≦0.040%;8%≦Ni≦14%;8%≦Cr≦14%;1.5%≦Mo+W/2≦3.0%;1.0%≦Al≦2.0%;0.5%≦Ti≦2.0%;2%≦Co≦9%;trace amounts≦N≦0.030%;trace amounts≦O≦0.020%;the remainder being iron and impurities resulting from the steelmaking;and its martensitic transformation beginning temperature Ms is calculated by the formula
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