Patent ID: 6294131
Filing Date: 2001-09-25
Classification: H01M,Y02E

Abstract:
A steel composition consisting of, in weight percent,Chromium 20-27.5 Carbon 0.001-0.20 Silicon <0.1 Manganese 0.005-0.10 Nickel <1.0 Nitrogen <0.25 Sulphur <0.05 Phosphorus <0.08 Aluminium <0.06 Additional Defined Metals <0.25 (total amount) REM 0.005-0.50 (total amount)with the residue iron, excluding incidental impurities, where Additional Defined Metals is any titanium, niobium, vanadium, molybdenum and copper present in the steel composition, and REM is any rare earth metal element or elements in the group of the lanthanide elements 57 to 71, scandium and yttrium, said steel having a stable, adherent and very thin layer of chromium oxide which protects the underlying metal from further oxygen induced degradation and provides a superior level of electrical conductivity for use in components of solid oxide fuel cells.