THERMAL RESISTANT FERRITE STAINLESS STEEL Russian patent published in 2011 - IPC C22C38/28 

FIELD: metallurgy.

SUBSTANCE: steel contains, wt carbon 0.015 or less, silicon 1.0 or less, manganese 1.0 or less, phosphorus 0.04 or less, sulphur 0.010 or less, chromium from 16 to 23, nitrogen 0.015 or less, niobium from 0.3 to 0.65, titanium 0.15 or less, molybdenum 0.1 or less, tungsten 0.1 or less, copper from 1.0 to 2.5, aluminium from 0.2 to 1.5, iron and unavoidable impurities - the rest. Steel can additionally contain one ore more elements chosen from boron 0.003 wt % or less, REM 0.08 wt % or less, zirconium 0.5 wt % or less, vanadium 0.5 wt % or less, cobalt 0.5 wt % or less and nickel 0.5 wt % or less.

EFFECT: steel possesses high resistance to oxidation and thermal fatigue.

4 cl, 5 dwg, 2 tbl, 2 ex