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THICK STEEL PLATE FOR WELDED STRUCTURE HAVING EXCELLENT STRENGTH AND TOUGHNESS IN CENTRAL REGION OF THICKNESS AND SMALL VARIATION OF PROPERTIES THROUGH THICKNESS AND METHOD OF PRODUCING THE SAME
THICK STEEL PLATE FOR WELDED STRUCTURE HAVING EXCELLENT STRENGTH AND TOUGHNESS IN CENTRAL REGION OF THICKNESS AND SMALL VARIATION OF PROPERTIES THROUGH THICKNESS AND METHOD OF PRODUCING THE SAME
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机译：具有中心强度和韧性的卓越强度和韧性的焊接结构厚钢板，其厚度特性的小变化及其制造方法
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摘要
Disclosed herein is a thick steel plate for welded structure having excellent strength and toughness in a central region and exhibiting small variation in properties through thickness. The steel plate comprises 0.05 ~ 0.10 % of C, 0.10 ~ 0.5 % of Si, 1.3 ~ 1.7 % of Mn, 0.0005 ~ 0.0025 % of B; 0.005 ~ 0.03 % of Ti, 0.010 % or less of N, 0.005 ~ 0.03 % of Nb, 0.005 ~ 0.055 % of Sol. Al, and the balance of Fe and other unavoidable impurities, in terms of weight%, wherein a content ratio of Ti/N is 2.0 or more, and a CP represented by Expression 1 is 40 ~ 50. CP = 165 x %C + 6.8 x %Si + 10.2 x %Mn + 80.6 x %Nb + 9.5 x %Cu + 3.5 x %Ni + 12.5 x %Cr + 14.4 x %Mo... (l)
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