EP 2235226 B1 20140409 - METHOD FOR SELECTING COMPOSITION OF STEEL AND ITS USE
Title (en)
METHOD FOR SELECTING COMPOSITION OF STEEL AND ITS USE
Title (de)
VERFAHREN ZUR WAHL DER ZUSAMMENSETZUNG VON STAHL UND VERWENDUNG DAVON
Title (fr)
PROCÉDÉ DE SÉLECTION DE LA COMPOSITION DE L'ACIER, ACIER, ET SON UTILISATION
Publication
Application
Priority
- FI 2008050715 W 20081205
- FI 20075886 A 20071207
Abstract (en)
[origin: WO2009071752A1] The invention relates to a method for selecting the composition of steel for applications exposed to high temperatures. To facilitate the selection of the steel composition to correspond to the desired fire resistance, yield strength grade and low manufacturing costs, the composition and cooling rate after hot-rolling are selected using the formulas LP95 = -177 + 9000C - 115000C2 + 750Nb + 71 Mo + 33Ni - 36Cr > 0, and Rpo.2 (MPa) = 261 + 2198C + 96Si + 52Mn + 59Cr + 137Mo + 48Ni + 35Cu + 41 BL + (-131 + 86Mn + 58BL)log10(CR), wherein BL refers to the boron level of the steel and CR to the cooling rate after hot-rolling. The invention also relates to a steel for use in applications requiring endurance of high temperatures and heat resistance, and to the use of such a steel.
IPC 8 full level
C22C 38/04 (2006.01); C22C 38/12 (2006.01)
CPC (source: EP FI)
C21D 8/00 (2013.01 - FI); C22C 38/04 (2013.01 - EP FI); C22C 38/12 (2013.01 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2009071752 A1 20090611; EP 2235226 A1 20101006; EP 2235226 B1 20140409; FI 20075886 A0 20071207; FI 20075886 L 20090608; PL 2235226 T3 20140930
DOCDB simple family (application)
FI 2008050715 W 20081205; EP 08856442 A 20081205; FI 20075886 A 20071207; PL 08856442 T 20081205