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AISI 4140 is a versatile chromium-molybdenum alloy steel with excellent hardenability and comprehensive mechanical properties. It features high tensile strength, good toughness, outstanding wear resistance and fatigue strength after quenching and tempering heat treatment. With stable mechanical performance and easy machining, it is widely used for gears, shafts, bolts, hydraulic parts, machinery structural components and high-load industrial parts.
AIS4340 is a high-strength nickel-chromium-molybdenum alloy steel with superior hardenability and outstanding comprehensive mechanical properties. After quenching and tempering treatment, it delivers ultra-high tensile strength, excellent toughness, impact resistance and fatigue performance. It maintains stable structural strength under heavy load and complex stress conditions, and is widely used in aerospace parts, high-load shafts, gears, heavy machinery components and high-strength fasteners.
8620 is a low-carbon nickel-chromium-molybdenum alloy steel designed for carburizing and case hardening. It features excellent toughness, good core ductility and fine grain structure. After carburizing, quenching and tempering, the surface gains high hardness and wear resistance while the core remains tough to withstand impact and heavy loads. It has great machinability and stable heat treatment performance, commonly used for gears, pinions, shafts, sprockets and various transmission mechanical
9310 is a premium low-carbon nickel-chromium-molybdenum carburizing alloy steel. With high nickel content and ultra-low carbon composition, it provides exceptional case hardness after carburizing while maintaining outstanding core toughness and impact resistance. It features excellent deep hardenability, superior fatigue strength, fine grain structure and stable mechanical properties at low temperatures. Widely used for heavy-duty gears, aircraft transmission parts, high-load shafts and critical
