FERRITE STAINLESS STEEL WITH HIGH HOT-RESISTANCE Russian patent published in 2012 - IPC C22C38/28 

FIELD: metallurgy.

SUBSTANCE: steel contains the following, wt %: C about 0.015 or less, Si from about 0.4 to 1.0, Mn about 1.0 or less, P about 0.040 or less, S about 0.010 or less, Cr from about 16 to 23, Al from about 0.2 to 1.0, N about 0.015 or less, Cu from about 1.0 to 2.5, Nb from about 0.3 to 0.65, Ti about 0.5 or less, Mo about 0.1 or less, W about 0.1 or less, Fe and unpreventable impurities the rest. Si and Al content satisfies the ratio Si (wt %) ≥ Al (wt %).

EFFECT: steel has high oxidation stability, thermal fatigue indices and fatigue at high temperatures.

7 cl, 10 dwg, 2 tbl, 2 ex