STEEL FOR ELEMENTS OF ATOMIC PILE ACTIVE ZONE WITH LEAD HEAT CARRIER Russian patent published in 2004 - IPC

FIELD: metallurgy, in particular stainless steel for construction elements of atomic pile active zone with lead or lead-bismuth heat carrier.

SUBSTANCE: disclosed steel contains (mass %): carbon 0.03-0.06, silicium 1.6-2.2, manganese 0.2-0.4; chromium 13.0-18.0; tungsten 0.6-0.9; aluminum 0.1-0.5; molybdenum 0.5-0.8; niobium 0.2-0.4; nickel at most 0.1; vanadium 0.2-0.4; nitrogen 0.03-0.25; oxygen at most 0.005; boron at most 0.006; cerium and/or yttrium (in total) at most 0.10; cobalt at most 0.02; copper at most 0.1; sulfur at most 0.010; phosphorus at most 0.015; and balance iron. Articles from claimed steel has improved corrosion resistance in lead heat carrier up to 650-700^oC and increased durability.

EFFECT: stainless steel with improved corrosion resistance and durability.

1 tbl, 1 ex