Effect of Multielement Alloying on the Properties of Lean-Alloyed Steels for Seamless Hot-Rolled Pipes in Hydrogen Sulfide-Resistant Design

Lean-alloyed pipe steels 10KhB, 10F, and 10B have been developed and obtained in laboratory conditions. The experimental steels after heat treatment including quenching and high-temperature tempering demonstrated a level of mechanical properties of pipes of strength classes K52–K56 due to the formation of a dispersed structure of tempered sorbite. High levels of impact toughness KCV at –60°C and corrosion resistance in hydrogen sulfide–containing media have been achieved: resistance to sulfide stress corrosion cracking and hydrogen cracking was shown; the total corrosion rate was less than 0.03 mm/year.