FIELD: metallurgy.
SUBSTANCE: invention relates to steel for fasteners in form of bolts. Steel includes the following chemical elements, wt %: C: 0.37–0.45, Si: 0.01–0.08, Mn: 0.45–0.80, Cr: 0.90–1.30, Mo: 0.20–0.45, Ni: 0.10–0.30, V: 0.15–0.30, Al: 0.015–0.035, Fe and unavoidable impurities are the rest. Steel has a microstructure including released sorbite.
EFFECT: steel has homogeneous structure and operational characteristics, has low production costs and has high strength and good resistance to delayed fracture.
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