Heat-resistant alloyed steel having high compressive strength - contg. chromium, silicon, manganese, nickel, cobalt, molybdenum, niobium and opt. tungsten

摘要

Heat-resistant alloyed steel having high compressive strength at 1250-1300 degres C. contains, wr.t. total wt., =0.15 (0.1-0.14)%C, 1-2 (1-1.8)% Si, 25-32 (26.1-29.4) % Cr, 1-2 (1.1-1.8)% Mn, 10-25 (15.2-24.5)% Ni, 25-45 (38.4-45.1)% Co, 0.3-10 (3.4-8)% Mo, =0.04 (0.02-0.03) % P, =0.04 (0.024-0.029)% S, 0-3 (0.3-3)% Nb, bal. Fe. Steel is used as (i) working material for rails or similar guide-rails installed on smelting chamber in a preheating furnace, and (ii) as supports for Si-contg. steels. Steels have higher compressive strength than steel contg. 30% Cr, 50% Co, Fe, and are sufficiently hard also when freshly cast.