American standard ASME/AISI/ASTM standard 4140 alloy seamless steel pipe is the core material in the fields of machinery manufacturing, petrochemical industry, automobile industry, etc., with high strength, wear resistance and corrosion resistance. As a medium carbon chromium-molybdenum alloy structural steel, 4140 achieves excellent comprehensive performance through quenching and tempering heat treatment, and is widely used in high-pressure pipelines, mechanical parts and oil drilling equipment.
Alloy composition: Contains 0.38-0.43% carbon (C), 0.75-1.00% manganese (Mn), 0.80-1.10% chromium (Cr) and 0.15-0.25% molybdenum (Mo). The grain structure is optimized through microalloying technology to improve hardenability and fatigue resistance.