EP 0160616 A3 19861230 - USE OF A STEEL IN ATMOSPHERES CONTAINING HYDROGEN SULFIDE
Title (en)
USE OF A STEEL IN ATMOSPHERES CONTAINING HYDROGEN SULFIDE
Publication
Application
Priority
DE 3415590 A 19840424
Abstract (en)
[origin: US4631095A] A ferritic perlite steel is used for pipes and tubing to be highly resistant against stress corrosion cracking when exposed to H2S, and having following alloying range, all percentages by weight: from 0.3 to 0.45 C, from 1.4 to 1.8 Mn, from 0.2 to 0.5 Si, from 0.2 to 0.5 Cr, from 0.04 to 0.1 V, up to 0.06 Nb, </=0.003 S, the remainder being iron whereby the combined Niobium and Vandium content must obey the rule that the sum of the V content plus twice the Nb content must not be not less than 0.1%; tubing is made by hot working followed by cooling in air from the final temperature attained during hot working, so that a texture and grain size in accordance with ASTM finer than 8 obtains; the tubing has strength value of 552 N/mm2</=0.2% of rupture elongation limit </=655 N/mm2 and a tensile strength exceeding 655 N/mm2.
IPC 1-7
IPC 8 full level
C22C 38/00 (2006.01); C21D 8/10 (2006.01); C22C 38/04 (2006.01)
CPC (source: EP US)
C21D 8/10 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US)
Citation (search report)
- [AD] GB 2101014 A 19830112 - MANNESMANN AG [DE]
- [A] GB 839063 A 19600629 - FAGERSTA BRUKS AB
- [A] US 4282047 A 19810804 - YAMAGATA MITSUKUNI, et al
- [A] US 4256517 A 19810317 - WAID GEORGE M, et al
- [A] US 3741822 A 19730626 - FORTON A [US]
Designated contracting state (EPC)
AT BE FR GB IT
DOCDB simple family (publication)
EP 0160616 A2 19851106; EP 0160616 A3 19861230; EP 0160616 B1 19881019; AT E38059 T1 19881115; BR 8501925 A 19851224; CA 1239332 A 19880719; DE 3415590 A1 19851031; DE 3415590 C2 19871112; JP S60234952 A 19851121; US 4631095 A 19861223
DOCDB simple family (application)
EP 85730016 A 19850201; AT 85730016 T 19850201; BR 8501925 A 19850423; CA 479760 A 19850423; DE 3415590 A 19840424; JP 8436985 A 19850419; US 72679985 A 19850424