Patent ID: 6368549
Filing Date: 2002-04-09
Classification: C21D,C22C

Abstract:
A metallurgical vessel comprising a refractory lining; a supporting metal shell surrounding the refractory lining, said metal shell comprising welded together shell rings and dished parts of a creep-resistant steel with plate thickness of up to 100 mm, wherein the creep-resistant steel is a water quenched and tempered close-grained structural steel having the following composition in wt.-%C 0.14-0.22 Cr 0.4-1.0 Mo 0.3-0.8 Ni 1.5-3.0 V 0.05-0.12 Mn 0.7-1.3 Pmax 0.015 Smax 0.003 Al 0.015-0.065 Si 0.20-0.60 Cumax 0.15 Nmax 0.012 Camax 0.004, the remainder being iron and impurities.