Global Patent Index - EP 1777314 B9

EP 1777314 B9 20160518 - RAW PIPE OF Fe-Ni ALLOY AND METHOD FOR PRODUCTION THEREOF

Title (en)

RAW PIPE OF Fe-Ni ALLOY AND METHOD FOR PRODUCTION THEREOF

Title (de)

ROHROHR AUS FE-NI-LEGIERUNG UND HERSTELLUNGSVERFAHREN DAFÜR

Title (fr)

TUYAU BRUT EN ALLIAGE DE Fe-Ni ET SA MÉTHODE DE PRODUCTION

Publication

EP 1777314 B9 (EN)

Application

EP 05755195 A

Priority

  • JP 2005011992 W
  • JP 2004194351 A

Abstract (en)

[origin: WO2006003953A1] A raw pipe made of an Fe-Ni alloy, which has a chemical composition that C: 0.04 % or less, Si: 0.50 % or less, Mn: 0.01 to 6.0 %, P: 0.03 % or less, S: 0.01 % or less, Cr: 20 to 30 %, Ni: 30 to 45 %, Mo: 0 to 10 %, W: 0 to 20 %, Cu: 0.01 to 1.5 %, Al: 0.01 % or less, N: 0.0005 to 0.20 % and the balance: substantially Fe, with the proviso that Mo(%) + 0.5W(%) is more than 1.5 % and not more than 10 %, wherein 1440 - 6000P - 100S - 2000C = 1300, Ni + 10(Mo + 0.5W) + 100N = 120, (Ni - 35) + 10(N - 0.1) - 2(Cr -25) - 5(Mo + 0.5W - 3) + 8 = 0 are satisfied. The above raw pipe made of the Fe-Ni alloy is excellent in the property of the inner surface thereof and thus can be finished into a seamless pipe by the use of Mannesman piercer, and the resultant seamless pipe has excellent mechanical properties and also excellent in the corrosion resistance under a sour gas circumstance. Accordingly, the above raw pipe made of the Fe-Ni alloy can be utilized as a raw pipe for an oil well pipe and a line pipe, and further as a raw pipe for various structural members in a nuclear power plant and a chemical industry plant.

IPC 8 full level

C22C 38/00 (2006.01); B21B 19/04 (2006.01); C21D 8/10 (2006.01); C22C 19/05 (2006.01); C22C 38/58 (2006.01); C22F 1/10 (2006.01)

CPC (source: EP)

C21D 8/10 (2013.01); C22C 19/055 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22F 1/10 (2013.01); B21B 23/00 (2013.01)

Designated contracting state (EPC)

DE FR IT NL SE

DOCDB simple family (publication)

EP 1777314 A1 20070425; EP 1777314 A4 20080109; EP 1777314 B1 20160203; EP 1777314 B9 20160518; AU 2005258506 A1 20060112; AU 2005258506 B2 20081120; CA 2572156 A1 20060112; CA 2572156 C 20131029; CN 100554475 C 20091028; CN 1977060 A 20070606; EP 2682494 A2 20140108; EP 2682494 A3 20180221; EP 2682494 B1 20191106; JP 4513807 B2 20100728; JP WO2006003953 A1 20080417; US 2007175547 A1 20070802; US 8784581 B2 20140722; WO 2006003953 A1 20060112

DOCDB simple family (application)

EP 05755195 A 20050629; AU 2005258506 A 20050629; CA 2572156 A 20050629; CN 200580022104 A 20050629; EP 13186005 A 20050629; JP 2005011992 W 20050629; JP 2006528763 A 20050629; US 64382306 A 20061222