HEAVY-WALLED STEEL MATERIAL HAVING 450MPA-GRADE TENSILE STRENGTH AND EXCELLENT RESISTANCE TO HYDROGEN INDUCED CRACK AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2018/117449

A1

Provided are: a heavy-walled steel material having 450MPA-grade tensile strength and excellent resistance to hydrogen induced crack; and a method for manufacturing the same. The heavy-walled steel material of the present invention comprises, in terms of weight%, 0.03-0.06% of C, 0.2-0.4% of Si, 1.0-1.6% of Mn, 0.03% or less of P, 0.003% or less of S, 0.06% or less of Al, 0.01% or less of N, 0.05-0.4% of Cu, 0.05-0.5% of Ni, 0.0005-0.003% of Ca, and the remainder Fe and unavoidable impurities, and has a thickness of 40 mm or more.

WO/1997/007253	AUSTENITIC ACID CORROSION-RESISTANT STAINLESS STEEL OF Al-Mn-Si-N SERIES
JP4102115	Enamel steel sheet with excellent workability, aging and enamel properties and its manufacturing method

KOH SEONG-UNG (KR)
PARK YOEN-JUNG (KR)

PCT/KR2017/013550

June 28, 2018

November 24, 2017

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POSCO (KR)

C22C38/04; C21D1/28; C21D8/02; C22C38/00; C22C38/02; C22C38/06; C22C38/08; C22C38/16

KR100622888B1	2006-09-14
KR20110060449A	2011-06-08
JP2014218707A	2014-11-20
KR20140002256A	2014-01-08
JP2003226933A	2003-08-15
KR20040021117A	2004-03-10
KR100833070B1	2008-05-27

See also references of EP 3561106A4

C&S PATENT AND LAW OFFICE (KR)

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