Steel for use in nuclear reactors - modified with aluminium, nitrogen and arsenic to improve hardenability , workability and impact strength

摘要

Steel contains (in wt %) C 0.13-0.18, Si 0.17-0.37, Mn 0.30-0.60, Cr 1.7-2.4, Ni 1.03-1.5, Mo 0.5-0.7, V 0.05-0.12, Al 0.01-0.035, N 0.005-0.012, Cu 0.11-0.20, As 0.0035-0.0055, the balance is Fe and incidental impurities. This steel can be used for the construction of large nuclear reactors working under elevated press. and intensive irradiation. The wall thickness can be 650 mm. The steel has improved throughout hardenability and low brittleness temp. which changes only slightly under reaction bombardment.