EP 0130362 B1 19880511 - METHOD OF PRODUCING A STEEL FOR HIGH STRENGTH COMPONENTS
Title (en)
METHOD OF PRODUCING A STEEL FOR HIGH STRENGTH COMPONENTS
Publication
Application
Priority
DE 3321965 A 19830618
Abstract (en)
[origin: EP0130362A1] 1. A process for making a steel for constructional parts which have to withstand temperatures of up to 560 degrés C in operation and must show, at room temperature, a tensile strength of at least 800 N/mm*2 at 0.2 % elongation ; an ultimate tensile strength of at least 900 N/mm*2 ; a notch impact energy of at least 40 joules on ISO-V test samples ; the following stresses in the creep resistance test : Rp 1.0 %/14**4 h/550 degrees C:200 N/mm**2 Rm /14**4 h/550 degrees C:200 N/mm**2 and a residual stress after 5000 hours of stressing at 550 degrees C of 108 N/mm**2, the initial stress (at 0.2 % elongation) being 341 N/mm**2 ; the steel consisting of : 0.17 to 0.25 % carbon 0.15 to 0.35 % silicon 0.35 to 0.85 % manganese at most 0.30 % phosphorous at most 0.35 % sulphur 1.25 to 1.5 % chromium 0.65 to 0.85 % molybdenum 0.90 to 1.10 % vanadium the remainder iron and melt impurities the steel being austenitised to 1010 degrees C until 65 % of the vanadium has been dissolved ; quenched to form a bainite hardening grain structure ; and annealed at 700 degrees C.
IPC 1-7
IPC 8 full level
C22C 38/22 (2006.01); C22C 38/24 (2006.01); F16B 33/00 (2006.01)
CPC (source: EP)
C22C 38/22 (2013.01); C22C 38/24 (2013.01)
Designated contracting state (EPC)
AT BE CH FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0130362 A1 19850109; EP 0130362 B1 19880511; AT E34187 T1 19880515; DE 3321965 A1 19841220; DE 3321965 C2 19860528
DOCDB simple family (application)
EP 84106058 A 19840528; AT 84106058 T 19840528; DE 3321965 A 19830618