EP 3175004 B1 20181107 - PROCESS FOR PRODUCING A STAINLESS STEEL TUBE AND STAINLESS STEEL TUBE
Title (en)
PROCESS FOR PRODUCING A STAINLESS STEEL TUBE AND STAINLESS STEEL TUBE
Title (de)
VERFAHREN ZUM HERSTELLEN EINES EDELSTAHLROHRS SOWIE EDELSTAHLROHR
Title (fr)
PROCÉDÉ DE FABRICATION D'UN TUBE EN ACIER INOXYDABLE ET TUBE EN ACIER INOXYDABLE
Publication
Application
Priority
- DE 102014110902 A 20140731
- EP 2015066280 W 20150716
Abstract (en)
[origin: WO2016016010A1] The present invention relates to a process for producing a high-grade steel tube comprising the steps of providing a tubular blank of an austenitic high-grade steel, wherein the high-grade steel comprises carbon in a proportion of no more than 0.02% by weight, manganese in a proportion of no more than 1.0% by weight, phosphorus in a proportion of no more than 0.03% by weight, sulphur in a proportion of no more than 0.015% by weight, silicon in a proportion of no more than 0.8% by weight, nickel in a proportion of 17.5% by weight to 18.5% by weight, chromium in a proportion of 19.5% by weight to 20.5% by weight, molybdenum in a proportion of 6.0% by weight to 6.5% by weight, nitrogen in a proportion of 0.18% by weight to 0.25% by weight and also copper in a proportion of 0.5% by weight to 1.0% by weight, with a remainder of iron and unavoidable impurities, and cold-forming the blank into a tube. In order to provide a corresponding process for producing a tube from an austenitic high-grade steel that allows the high-grade steel tube to be stranded in a later processing step and at the same time allows the tube to be transported to a location at which this processing step is performed, it is proposed according to the invention that the process additionally comprises the steps of coiling the tube and annealing the coiled tube after the cold-forming at a temperature in a range from 1100°C to 1200°C.
IPC 8 full level
C21D 8/10 (2006.01); B21C 47/02 (2006.01); B23K 31/02 (2006.01); C21D 9/08 (2006.01)
CPC (source: EP KR US)
B21B 21/005 (2013.01 - US); B21C 1/003 (2013.01 - EP US); B21C 47/262 (2013.01 - EP US); C21D 6/004 (2013.01 - EP US); C21D 8/105 (2013.01 - EP KR US); C21D 9/08 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/004 (2013.01 - KR); C22C 38/04 (2013.01 - EP US); C22C 38/42 (2013.01 - EP KR US); C22C 38/44 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP US); C22C 38/52 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP KR US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DE 102014110902 A1 20160204; CN 106794501 A 20170531; CN 106794501 B 20190104; EP 3175004 A1 20170607; EP 3175004 B1 20181107; ES 2710481 T3 20190425; JP 2017530254 A 20171012; JP 6637027 B2 20200129; KR 102426526 B1 20220727; KR 20170040280 A 20170412; US 10597743 B2 20200324; US 2018209005 A1 20180726; WO 2016016010 A1 20160204
DOCDB simple family (application)
DE 102014110902 A 20140731; CN 201580041671 A 20150716; EP 15747396 A 20150716; EP 2015066280 W 20150716; ES 15747396 T 20150716; JP 2017504410 A 20150716; KR 20177005309 A 20150716; US 201515500251 A 20150716