EP 1361290 B1 20060726 - Use of a steel for chemical tank, excellent in sulfuric acid corrosion resistance and pitting corrosion resistance
Title (en)
Use of a steel for chemical tank, excellent in sulfuric acid corrosion resistance and pitting corrosion resistance
Title (de)
Verwendung von Stahl für chemische Behälter mit hervorragendem Widerstand gegen Schwefelsäurekorrosion und Lochfrasskorrosion
Title (fr)
Utilisation d'un acier pour cuves chimiques avec excellente résistance à la corrosion par l'acide sulfurique et une résistance à la corrosion par piqûre
Publication
Application
Priority
JP 2002135883 A 20020510
Abstract (en)
[origin: EP1361290A1] The present invention provides a steel for a chemical tank, the steel suppressing the generation of corrosion damage by sulfuric acid and pitting corrosion by salt water, and is a steel for a chemical tank, the steel being excellent in sulfuric acid corrosion resistance and pitting corrosion resistance, characterized in that: the steel contains, by mass, C: 0.003 to 0.05%, Si: not more than 5%, Mn: not more than 2%, P: not more than 0.03%, S: not more than 0.010%, O: not more than 0.0050%, Cr: 18 to 25%, Ni: 10 to 20%, Mo: 1.0 to 4.5%, Cu: 1.0 to 3.0%, and N: 0.05 to 0.3%, with the balance consisting of Fe and unavoidable impurities; the GI value defined by the expression GI = ÄCrÜ + 1.6 x ÄNiÜ + 6.0 x ÄMoÜ + 7.1 x ÄCuÜ is in the range from 75 to 88, wherein the relevant components are expressed in terms of a mass percent; and the PI value defined by the expression PI = ÄCrÜ + 1.3 x ÄMoÜ + 1.4 x ÄCuÜ + 2.2 x ÄNÜ is in the range from 23 to 32, wherein the relevant components are expressed in terms of mass percent. <IMAGE>
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/40 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/58 (2006.01); C21D 8/02 (2006.01)
CPC (source: EP KR)
C22C 38/001 (2013.01 - EP); C22C 38/40 (2013.01 - KR); C22C 38/42 (2013.01 - EP); C22C 38/44 (2013.01 - EP); C21D 8/0205 (2013.01 - EP); C21D 8/0226 (2013.01 - EP); C21D 8/0263 (2013.01 - EP)
Designated contracting state (EPC)
DE ES FR SE
DOCDB simple family (publication)
EP 1361290 A1 20031112; EP 1361290 B1 20060726; DE 60306981 D1 20060907; DE 60306981 T2 20070308; ES 2263874 T3 20061216; JP 2003328087 A 20031119; JP 3736631 B2 20060118; KR 100545750 B1 20060124; KR 20030087955 A 20031115
DOCDB simple family (application)
EP 03010309 A 20030507; DE 60306981 T 20030507; ES 03010309 T 20030507; JP 2002135883 A 20020510; KR 20030029001 A 20030507