STEEL Russian patent published in 2008 - IPC C22C38/58 

FIELD: petroleum and chemical industry.

SUBSTANCE: the present innovation deals with applying steel of the following composition, weight%: carbon 0.2-0.4; silicon 0.6-1.0; manganese 1.0-2.0; chromium 18.0-22.0; nickel 22.0-26.0; niobium 0.8-1.2; tungsten 0.8-1.2; molybdenum 4.0-5.0; zirconium 0.4-0.8; nitrogen 0.05-0.07; boron 0.05-0.1; calcium 0.004-0.008; copper 0.1-0.2; yttrium 0.1-0.2; iron - the rest. The innovation provides increased thermal shock resistance of the steel.

EFFECT: increased thermal shock resistance.

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