EP 1533392 A1 20050525 - STEEL PRODUCT FOR HIGH HEAT INPUT WELDING AND METHOD FOR PRODUCTION THEREOF
Title (en)
STEEL PRODUCT FOR HIGH HEAT INPUT WELDING AND METHOD FOR PRODUCTION THEREOF
Title (de)
STAHLPRODUKT ZUM SCHWEISSEN MIT HOHEM WÄRMEEINTRAG UND VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
ACIER POUR SOUDURES A FORT APPORT THERMIQUE ET SON PROCEDE DE PRODUCTION
Publication
Application
Priority
JP 0208977 W 20020904
Abstract (en)
A steel enables to secure a high toughness in a weld heat affected zone in welding performed with a high heat input exceeding 400 kJ/cm, and a manufacturing method enables the steel to be manufactured. The steel has a composition including C: 0.03 to 0.15 mass%; Si: 0.05 to 0.25 mass%; Mn: 0.5 to 2.0 mass%; P: 0.03 mass% maximum; S: 0.0005 to 0.0030 mass%; Al: 0.005 to 0.1 mass%; Ti: 0.004 to 0.03 mass%; N: 0.0020 to 0.0070 mass%; and Ca: 0.0005 to 0.0030 mass%. Individual contents of Ca, O (oxygen), and S satisfy the following expression (1), and the balance of the composition comprises Fe (iron) and unavoidable impurities. <DF NUM="(1)">0.3 ≤ ACR ≤ 0.8 </DF> where ACR = (Ca - (0.18 + 130 x Ca) x O)/1.25/S, where Ca, O, and S each represent the content (mass%) thereof. <IMAGE>
IPC 1-7
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/14 (2006.01); C22C 38/18 (2006.01)
CPC (source: EP KR)
C21D 8/02 (2013.01 - EP KR); C22C 38/002 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP KR); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP KR)
Designated contracting state (EPC)
DE FR IT
DOCDB simple family (publication)
WO 2004022807 A1 20040318; CN 100402688 C 20080716; CN 1561403 A 20050105; EP 1533392 A1 20050525; EP 1533392 A4 20051207; EP 1533392 B1 20170802; KR 100622888 B1 20060914; KR 20040040485 A 20040512
DOCDB simple family (application)
JP 0208977 W 20020904; CN 02819346 A 20020904; EP 02763002 A 20020904; KR 20047004838 A 20020904