STEEL "CARTEX 500" Russian patent published in 2004 - IPC

FIELD: metallurgy; steels used for manufacture of articles, up to 20 mm thick liable to impact and abrasive wear and working at temperature below minus10 C. SUBSTANCE: proposed steel contains the following components, mass-%: carbon, 0.25- 0.30; manganese, 1.1-1.7; chromium, 0.6-0.9; nickel, 0.1-0.3; silicon, 0.2-0.4; vanadium, 0.05-0.08; copper, 0.1-0.3; aluminum, 0.02-0.04; boron, 0.001-0.002; calcium, 0.01-0.05; nitrogen, 0.005-0.015; the remainder being iron and admixtures. EFFECT: enhanced cold resistance at retained hardness. 2 tbl