FIELD: ferrous metallurgy; applicable in manufacture of members of furnace equipment operating at temperatures ranging from 700 to 1100 C in furnace gases medium. SUBSTANCE: steel has the following qualitative and quantitative composition, mas. carbon 0.10-0.46; silicon 0.7-2.7; manganese 0.3-2.0; chromium 16.0-28.0; nickel 8.0-23.0; aluminium 0.02-0.45; boron 0.0002-0.0010; zirconium 0.001-0.010 or tungsten 0.002-0.020; the balance, iron. EFFECT: higher performance castings with no cracks.
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