The nano-structured pearlitic steel was produced by casting a steel composition—including 0.71–0.73 wt% Carbon, 1.5–1.6 wt% Aluminum, 1.4–1.5 wt% Chromium, 2.6–2.7 wt% Cobalt, and other alloying elements—into a slab measuring 170 × 70 × 70 mm using a vacuum induction furnace. A section of 105 × 65 × 32 mm was homogenized at 950°C–1050°C for 48–72 hours to eliminate macro segregation, followed by hot rolling at the same temperature range to achieve 60%–75% thickness reduction with cross rolling and intermittent reheating to prevent texture dominance. The rolled steel underwent heat treatments: austenitization at 1000°C–1200°C for 1–2.6 hours and isothermal transformation at 580°C–730°C for 40–110 minutes, with rapid transfer between furnaces under 10 seconds, before air cooling. The resulting fully pearlitic microstructure exhibited fine interlamellar spacing of 60-135 nm and superior mechanical properties, including yield strength of 1.0–1.2 GPa and ultimate tensile strength of 1.6–2.0 GPa.