Global Patent Index - EP 1031636 A2

EP 1031636 A2 2000-08-30 - Heavy wall steel material having superior weldability and method for producing the same

Title (en)

Heavy wall steel material having superior weldability and method for producing the same

Title (de)

Stahlwerkstoff mit verbesserter Schweissbarkeit für dickwandige Bauteile und Herstellungsverfahren

Title (fr)

Materiau en acier ayant une soudabilité améliorée pour éléments de construction à paroi épaisse et procédé de fabrication

Publication

EP 1031636 A2 (EN)

Application

EP 00301481 A

Priority

JP 4896299 A

Abstract (en)

A tough high strength heavy wall steel material having superior weldability is provided, said steel material has a diameter or a side 5 mm or more in length, and comprises oxides 1 mu m or less in particle diameter homogeneously dispersed at a dispersion density in a range of from10,000 to 100,000 particles/mm<2> and uniform ferrite grains 2 mu m or less in grain diameter formed over the entire plane making a right angle with respect to the rolling direction. <IMAGE>

IPC 1-7 (main, further and additional classification)

C22C 1/10; C21D 8/00; C22C 38/04

IPC 8 full level (invention and additional information)

C21D 8/00 (2006.01); C21D 8/06 (2006.01); C22C 1/10 (2006.01); C22C 32/00 (2006.01); C22C 33/04 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/14 (2006.01)

CPC (invention and additional information)

C21D 8/00 (2013.01); C21D 8/06 (2013.01); C22C 1/1094 (2013.01); C22C 32/0026 (2013.01); C22C 38/04 (2013.01); B22F 2998/00 (2013.01)

Combination set (CPC)

B22F 2998/00 + C22C 1/1036

Designated contracting state (EPC)

AT BE DE FR GB IT

EPO simple patent family

EP 1031636 A2 20000830; EP 1031636 A3 20020403; EP 1031636 B1 20041013; AT 279543 T 20041015; CN 1144884 C 20040407; CN 1297063 A 20010530; DE 60014726 D1 20041118; DE 60014726 T2 20060309; JP 2000239781 A 20000905; JP 3538613 B2 20040614; KR 100628795 B1 20060927; KR 20000058123 A 20000925; US 2002026969 A1 20020307; US 2003145917 A1 20030807; US 2005178482 A1 20050818; US 2007119527 A1 20070531; US 2011083775 A1 20110414

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