HIGH-TENSILE STRENGTH STEEL AND MANUFACTURING METH

专利名称：HIGH-TENSILE STRENGTH STEEL AND

MANUFACTURING METHOD THEREOF

发明人：ICHIMIYA, Katsuyuki,YOKOTA,

Tomoyuki,NISHIMURA, Kimihiro,SHIKANAI,Nobuo

申请号：EP09726619.1申请日：20090327公开号：EP2272994A1公开日：20110112

专利附图：

摘要：Proposed are a high-tensile strength steel that is excellent in strength and

toughness of the base material and also excellent in toughness of the weld heated zone,even if the steel has a large thick, and a method of advantageously manufacturing thesteel. Specifically, the high-tensile strength steel has a component composition including,in mass%, C: 0.03 to 0.10%, Si: 0.30% or less, Mn: 1.60 to 2.30%, P: 0.015% or less, S:0.005% or less, Al: 0.005 to 0.06%, Nb: 0.004 to 0.05%, Ti: 0.005 to 0.02%, N: 0.001 to0.005%, Ca: 0.0005 to 0.003%, and the balance of Fe and inevitable impurities so that Ca, S,and O satisfy the following expression (1): 0

申请人：JFE Steel Corporation

地址：2-3, Uchisaiwaicho 2-chome Chiyoda-ku Tokyo 100-0011 JP

国籍：JP

代理机构：Stebbing, Timothy Charles

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