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Class Information
Number: 148/592
Name: Metal treatment > Process of modifying or maintaining internal physical structure (i.e., microstructure) or chemical properties of metal, process of reactive coating of metal and process of chemical-heat removing (e.g., flame-cutting, etc.) or burning of metal > Heating or cooling of solid metal > Iron(fe) or iron base alloy > Pipe or tube > Nine percent or more chromium(cr) (e.g., stainless steel, etc.)
Description: Process wherein the pipe or tube is an iron alloy containing nine percent or more chromium (Cr) (e.g., stainless steel, etc.).

Patents under this class:
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Patent Number Title Of Patent Date Issued
8613817 Method for producing duplex stainless steel seamless pipe Dec. 24, 2013
8479549 Method of producing cold-worked centrifugal cast tubular products Jul. 9, 2013
8366843 Method of manufacturing a martensitic stainless steel pipe Feb. 5, 2013
8333851 Method for producing two-phase stainless steel pipe Dec. 18, 2012
8293037 Method for producing duplex stainless steel pipe Oct. 23, 2012
8172959 Austenitic stainless steel, manufacturing method for the same, and structure using the same May. 8, 2012
8168014 Method for manufacturing martensitic stainless steel pipe or tube May. 1, 2012
8075991 Stainless steel member for a fuel cell Dec. 13, 2011
8038811 Process for producing bent pipe for line pipe Oct. 18, 2011
8034198 Austenitic stainless steel tube for boiler with excellent resistance to high temperature steam oxidation Oct. 11, 2011
8021502 Method for producing martensitic stainless steel pipe Sep. 20, 2011
7926180 Method for manufacturing gas and liquid storage tanks Apr. 19, 2011
7862666 Highly anticorrosive high strength stainless steel pipe for linepipe and method for manufacturing same Jan. 4, 2011
7686897 Martensitic stainless steel seamless pipe and a manufacturing method thereof Mar. 30, 2010
7485197 Method for manufacturing martensitic stainless steel tube Feb. 3, 2009
7475478 Method for manufacturing automotive structural members Jan. 13, 2009
7470336 Method of producing fine-grained martensitic stainless steel Dec. 30, 2008
7399372 Method for manufacturing metallic bellows Jul. 15, 2008
7238434 Welded structure having improved resistance to stress corrosion cracking Jul. 3, 2007
7232053 Seam-welded air hardenable steel constructions Jun. 19, 2007
7201812 Method for manufacturing seamless steel tube Apr. 10, 2007
7138069 Method of surface-finishing stainless steel after descaling Nov. 21, 2006
7094295 Ferritic stainless steel sheet having good workability and manufacturing method thereof Aug. 22, 2006
6899773 Fine-grained martensitic stainless steel and method thereof May. 31, 2005
6890393 Fine-grained martensitic stainless steel and method thereof May. 10, 2005
6890665 Martensitic stainless steel and method for manufacturing the same May. 10, 2005
6887322 High pressure cylinders including backing steel with tool steel lining May. 3, 2005
6780261 Method of manufacturing an implantable stent having improved mechanical properties Aug. 24, 2004
6692592 Method for manufacturing high chromium system seamless steel pipe Feb. 17, 2004
6610154 Surface treatment of austenitic Ni-Fe-Cr based alloys for improved resistance to intergranular corrosion and intergranular cracking Aug. 26, 2003
6475307 Method for fabricating vehicle components and new use of a precipitation hardenable martensitic stainless steel Nov. 5, 2002
6436202 Process of treating a stainless steel matrix Aug. 20, 2002
6344097 Surface treatment of austenitic Ni-Fe-Cr-based alloys for improved resistance to intergranular-corrosion and-cracking Feb. 5, 2002
6303237 Ferritic alloy for constructions Oct. 16, 2001
6302974 Method and apparatus for straightening turbine casings Oct. 16, 2001
6231690 Method of oxidizing inner surface of ferritic stainless pipe May. 15, 2001
6159311 Martensitic stainless steel pipe and method for manufacturing the same Dec. 12, 2000
6136109 Method of manufacturing high chromium martensite steel pipe having excellent pitting resistance Oct. 24, 2000
6103027 Method of making seam free welded pipe Aug. 15, 2000
6090230 Method of cooling a steel pipe Jul. 18, 2000
6060180 Alloy having high corrosion resistance in environment of high corrosiveness, steel pipe of the same alloy and method of manufacturing the same steel pipe May. 9, 2000
5849116 Production method for steel material and steel pipe having excellent corrosion resistance and weldability Dec. 15, 1998
5817193 Metal alloys having improved resistance to intergranular stress corrosion cracking Oct. 6, 1998
5783000 Method for heat treatment of steel, and products of steel Jul. 21, 1998
5702543 Thermomechanical processing of metallic materials Dec. 30, 1997
5605587 Apparatus for magnetic conditioning of liquids and methods of making same Feb. 25, 1997
5462615 Weldable high-strength structural steel with 13% chromium Oct. 31, 1995
5352406 Highly mechanical and corrosion resistant stainless steel and relevant treatment process Oct. 4, 1994
5049210 Oil Country Tubular Goods or a line pipe formed of a high-strength martensitic stainless steel Sep. 17, 1991
5026436 Process for the production of tubular bodies Jun. 25, 1991

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