HIGH-STRENGTH STEEL FOR ROPE WITH HIGH FATIGUE LIFE AND WIRE ROD, AND METHOD OF PRODUCTION THEREOF Russian patent published in 2025 - IPC C22C38/24 C22C38/34 C22C38/32 C22C38/22 C21D8/06 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to high-strength steel and wire rod from it, used for fabrication of bridge ropes. Steel has a composition containing the following chemical elements, wt.%: C: 0.90–1.00, Si: 0.90–1.50, Mn: 0.25–0.58, Cr: 0.20–1.00, V: 0.03–0.12, Ca: 0.0008–0.0025, optionally, at least one of the following chemical elements: Mo: 0.10–0.80, B: 0.0008–0.0012 and Re: 0.0005–0.008, the rest is Fe and unavoidable impurities. Total content of unavoidable impurities is ≤ 0.10 wt.%, wherein content of impurities meets at least one of the following requirements: Cu ≤ 0.05, Al ≤ 0.004, Ti ≤ 0.003, P ≤ 0.015, S ≤ 0.010, O ≤ 0.0025, N ≤ 0.0045.

EFFECT: steel has high fatigue life.

12 cl, 5 tbl, 11 ex