The invention discloses a non-quenched and tempered steel for a heavy
truck balance shaft. The non-quenched and tempered steel is prepared from the following components in percentage by
mass: C, Si, Mn, P, S, Cr, V, Ni, Cu, Mo, Ti, Alt, N, O, H, Sn, Sb, As, Pb and Fe. The invention also provides a preparation method of the non-quenched and tempered steel for the heavy
truck balance shaft; the non-quenched and tempered steel is produced by virtue of
smelting and refining, and reasonable heating, rolling control and cold control processes, and is excellent in properties: the tensile strength of the steel is 960-1000MPa, the yield strength of the steel is 700-750MPa, the elongation percentage of the yield is greater than or equal to 15%, the
percentage reduction of area of the steel is greater than or equal to 40% and the longitudinal
impact of the steel at the normal temperature of 20 DEG C is greater than or equal to 50J; in addition, the steel has an excellent
toughness match, and is excellent in processability, high in
forging technical adaptability and steady in performance.