EP 0845544 B1 20030102 - Steel product made from bainitic steel and process for making the steel product
Title (en)
Steel product made from bainitic steel and process for making the steel product
Title (de)
Stahlprodukt aus bainitischem Stahl sowie Verfahren zur Herstellung des Stahlproduktes
Title (fr)
Produit sidérurgique en acier ayant une structure bainitique et procédé pour la fabrication du produit sidérurgique
Publication
Application
Priority
FR 9614434 A 19961126
Abstract (en)
[origin: EP0845544A1] A steel section comprises by weight 0.06-0.11% carbon, 1-1.7% manganese, 0.15-0.40% silicon, 0.025-0.10% sulphur, up to 0.025% phosphorous, 0-0.25% nickel, 0.5-1.2% chromium, 0.08-0.13% molybdenum, 0-0.25% copper, 0.003-0.035% aluminium, 0-0.035% titanium, 0-0.10% vanadium, 0-0.06% niobium, 0.0008-0.0040% boron and 0.0060-0.011% nitrogen, with optionally up to following levels- 0.010% tellurium, 0.025% selenium, 0.13% bismuth, 0.090% lead and 0.0040% calcium, the remainder being iron and impurities. The sum Mn+Cr+Mo is at least 2.1%, the sum V+Nb+Ti is between 0.015 and 0.13%, Al+Ti is at least 0.020% and the ratio Mn/S is at least 12. The section has a bainitic structure and exhibits following mechanical properties at 20 degrees C- tensile strength at least 1000 MPa, ratio of elastic limit to tensile strength at least 0.78, resilience at least 45 J/cm<2> and contraction of area at least 55%. Also claimed are making such a section and machining it to form a finished article.
IPC 1-7
IPC 8 full level
C21D 1/19 (2006.01); C21D 1/20 (2006.01); C21D 8/02 (2006.01); C22C 38/32 (2006.01)
CPC (source: EP)
C21D 1/19 (2013.01); C21D 1/20 (2013.01); C21D 8/0263 (2013.01); C22C 38/32 (2013.01); C21D 2211/002 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB IT LI LU NL PT SE
DOCDB simple family (publication)
EP 0845544 A1 19980603; EP 0845544 B1 20030102; AT E230443 T1 20030115; DE 69718132 D1 20030206; DE 69718132 T2 20031009; ES 2190514 T3 20030801; FR 2756298 A1 19980529; FR 2756298 B1 19981224; NO 975392 D0 19971124; NO 975392 L 19980527
DOCDB simple family (application)
EP 97402787 A 19971120; AT 97402787 T 19971120; DE 69718132 T 19971120; ES 97402787 T 19971120; FR 9614434 A 19961126; NO 975392 A 19971124