sae 4340
SAE 4340 is a versatile low-alloy steel known for its exceptional combination of strength, toughness, and wear resistance. This high-grade steel contains chromium, nickel, and molybdenum as primary alloying elements, making it suitable for demanding applications requiring superior mechanical properties. The material responds excellently to heat treatment processes, allowing for customized hardness levels while maintaining good ductility. In its heat-treated condition, SAE 4340 demonstrates remarkable tensile strength, typically ranging from 90,000 to 280,000 psi, depending on the specific heat treatment applied. The steel's balanced composition enables it to maintain its properties even in larger cross-sections, making it particularly valuable in heavy-duty applications. Industries frequently utilize SAE 4340 in critical components such as aircraft landing gear, power transmission gears, heavy-duty shafts, and high-performance automotive parts. The material's excellent fatigue resistance and good impact strength make it an ideal choice for components subject to cyclic loading and sudden stress applications.