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Tube processing and aging effects in FeCrAl ODS steels are investigated infour mechanical alloyed ferritic ODS steels, Fe15Cr (SP2), Fe15Cr5Al (SP4),Fe15Cr7Al (SP7) and Fe18Cr7Al (SP11). These steels were made into 0.3mm thickplates by simulated tube processing (STP). Strengthening after partialrecrystallization was achieved after the last cold rolling and heat treatmentstep. However, the ductility reduced about one third of the as-extruded steels.The STPed steels were aged at 475{\deg}C in sealed vacuum tubes up to 2000 hrsand 10000 hrs, respectively. The yield stress and elongation were investigatedby tensile tests. The results revealed that all the STPed steels fractured in aductile manner irrespective of aging conditions. Aging hardening and ductilityreduction in STPed steels are similar to as-extruded ones. The STPed ODS steelsshowed similar ageing embrittlement resistance as as-extruded steels, but muchhigher than the non-ODS steels. The aging hardening based on cut-through andbow-pass mechanisms were discussed. The time dependent hardening of overagedsteel (beta prime only) was analyzed as well.

475{\deg}C aging embrittlement of partially recrystallized FeCrAl ODS ferritic steels after simulated tube process