Influence of alternating cold flexure on the properties of low-alloy pipe steel (strength class K56–K65)

In laboratory conditions, the cold straightening of thick (17.5 mm) low-carbon low-alloy steel sheet (yield point no less than 550 N/mm2) is simulated by alternating flexure. The influence of the number of cycles and the strain in alternating flexure on the strength of the steel is studied. For industrial production on the 5000 mill at OAO Vyksunskii Metallurgicheskii Zavod (VMZ), the influence of the cold-rolling conditions on the yield point and strength of thick (15–23 mm) steel sheet (strength class K56–K65) is demonstrated.