I.P.Bardin Research Institute;
Center for Pipe and Weld Structure Steels;
9/23;
2-nd Baumanskaya Str.;
105005;
Moscow;
Russia;
"MMK"-Magnitogorsky Iron and Steel Works;
93;
Kirov Str.;
455002;
Magnitogorsk;
Russia;
microalloying; microstructure; accelerated; cooling; precipitation;