Abstract: The present disclosure relates to a resistant steel composition comprising a nickel content from about 3% MB to about 4% MB; a manganese content from about 0.5% MB to about 1.5% MB; a chromium content from about 12% MB to about 13.4% MB; a molybdenum content from about 0.3% MB to about 0.7% MB; and a copper content of less than about 0.40% MB. In some embodiments, the present disclosure relates to a process for generating a resistant steel composition, the process comprising melting one or more resistant steel components together to form a melted steel; refining the melted steel to form a refined steel; and purifying the refined steel to form the resistant steel composition.

Abstract: The present disclosure relates, according to some embodiments, to a resistant steel composition including a nickel content from about 1.75% MB to about 5.75% MB. Further, the present disclosure relates to a fluid end block assembly for use in a plunger pump apparatus, the fluid end assembly including: at least one cylinder body configured to receive a respective plunger from a power end; at least one suction bore configured to house a valve body, a valve seat, a spring; a spring retainer, with at least one of the cylinder body, the suction bore, and the spring retainer being composed of a steel composition having a nickel content from about 1.75% MB to about 5.75% MB.