HEAT RESISTANT STEEL Russian patent published in 2011 - IPC C22C38/50 C22C38/28 C22C38/18 

FIELD: metallurgy.

SUBSTANCE: steel of ferrite class is used as heat resistant and corrosion resistant sheet material for fabrication of boiler, furnace, petrochemical and other high temperature equipment operating at temperature up to 1200°C. Steel contains carbon, silicon, manganese, chromium, nickel, aluminium, niobium, titanium, copper, calcium, cerium, sulphur, phosphorus, nitrogen and iron at the following ratio of components, wt %: carbon 0.006 - 0.03, silicon 0.10 - 0.30, manganese 0.15 - 0.50, chromium 16.50 - 18.50, nickel 0.05 - 0.50, aluminium 2.50 - 3.00, niobium 0.20 - 0.40, titanium 0.10 - 0.40, copper ≤ 0.15, calcium from over 0.01 to 0.025, cerium 0.005 - 0.03, sulphur 0.006 - 0.015, phosphorus 0.006 - 0.020, nitrogen 0.008 - 0.02, iron - the rest.

EFFECT: raised operational reliability of equipment and resource of operation at maintaining high processability at steel forming operation, high scale resistance.

2 cl, 4 tbl