C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/14 (2006.01) C21D 8/02 (2006.01) C22C 38/02 (2006.01) C22C 38/04 (2006.01) C22C 38/08 (2006.01)
Patent
CA 2757223
A steel for a welded structure includes the following composition: by mass%, C at a C content [C] of 0.010 to 0.065%; Si at a Si content [Si] of 0.05 to 0.20%; Mn at a Mn content [Mn] of 1.52 to 2.70%; Ni at a Ni content [Ni] of 0.10% to 1.50%; Ti at a Ti content [Ti] of 0.005 to 0.015%; O at an O content [O] of 0.0010 to 0.0045%; N at a N content [N] of 0.002 to 0.006%; Mg at a Mg content [Mg] of 0.0003 to 0.003%; Ca at a Ca content [Ca] of 0.0003 to 0.003%; and the balance composed of Fe and unavoidable impurities. A steel component parameter P CTOD is 0.065% or less, and a steel component hardness parameter CeqH is 0.235% or less.
La présente invention concerne un matériau en acier apte au soudage qui contient 0,010 % à 0,065 % de C, 0,05 % à 0,20 % de Si, 1,52 % à 2,70 % de Mn, 0,10 % à 1,50 % de Ni, 0,005 % à 0,015 % de Ti, 0,0010 % à 0,0045 % de O, 0,002 % à 0,006 % de N, 0,0003 % à 0,003 % de Mg et 0,0003 % à 0,003 % de Ca, le reste étant constitué de fer et des inévitables impuretés. Le matériau en acier apte au soudage a un PCTOD inférieur ou égal à 0,065 % et un paramètre de dureté de composant d'acier CeqH inférieur ou égal à 0,235 %.
Chijiiwa Rikio
Fukunaga Kazuhiro
Kojima Akihiko
Uemori Ryuji
Watanabe Yoshiyuki
Goudreau Gage Dubuc
Nippon Steel Corporation
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