Use of austenitic stainless steels in applications requiring anti-coking properties
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United States of America Patent
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Nov 30, 2004
Grant Date -
Sep 19, 2002
app pub date -
Jan 15, 2002
filing date -
Jan 15, 2001
priority date (Note) -
Expired
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Abstract
An austenitic stainless steel with a composition comprising: at most 0.15% of C; 2% to 10% of Mn; at most 2% of Ni; at most 4% of Cu; 0.1% to 0.4% of N; 10% to 20% of Cr; at most 1% of Si; at most 3% of Mo; and at most 0.7% of Ti; is used to manufacture equipment, for example furnaces, reactors or ducts, or elements of this equipment, or to coat the internal walls of this equipment, said equipment being used to implement petrochemical processes conducted at temperatures of 350.degree. C. to 1100.degree. C. and in which coke can be formed.
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