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THICK STEEL PLATE HAVING EXCELLENT WELDABILITY AND LOW TEMPERATURE TOUGHNESS 发明申请

2023-12-01 3920 98K 0

专利信息

申请日期 2025-07-09 申请号 JP2005060600
公开(公告)号 JP2006241551A 公开(公告)日 2006-09-14
公开国别 JP 申请人省市代码 全国
申请人 NIPPON STEEL CORP
简介 PROBLEM TO BE SOLVED : To provide a thick steel plate having excellent weldability and low temperature toughness in which the increase of strength and functionality and the reduction of cost can be attained by increasing the amount of Mn to be added and reducing the amounts of Ni and Cu to be added. SOLUTION : The thick steel plate has a composition comprising, by mass, 0.01 to 0.14% C, >1.60 to 3.00% Mn, and C and Mn satisfying C+Mn/20≤0.22% and Mn≥2.30-10C(%), comprising P : 0.020-0.04(C+Mn/20)(%) or below, S : 0.015-0.04(C+Mn/20)(%) or below, and ≤0.005% O as well, and further comprising one or more kinds selected from the group consisting of ≤0.50% Si, ≤0.060% Al, ≤0.025% Ti, ≤0.0060% Ca, ≤0.0100% rare earth metals and ≤0.0050% Mg, and the balance iron with inevitable impurities. COPYRIGHT : (C)2006, JPO&NCIPI


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