AISI 4340 (UNS G43400) is an iron-chromium-molybdenum alloy steel. It is characterized by high toughness, strength, and ductility. It offers excellent tensile and impact strength at high temperatures, and can be used for a wide range of applications, from automotive components to oil gas applications. Its superior mechanical properties make it suitable for use in a variety of industrial processes, including offshore drilling, aerospace components, and high-performance racing cars.
AISI 4340, also known as EN24 or 1.6582, is usually supplied in the quenched and tempered condition with a hardness of between 24 HRc and 34 HRc. It offers excellent weldability and machinability and can be readily heat treated. The grade of the alloy is typically used in shafts, axles, transmission components, gears and other components that require high strength at a relatively low weight. It is also used in a range of applications, including automotive components and fasteners, aircraft and aerospace components, as well as in many other industrial applications.
AISI 4340 has superior mechanical properties, including a high strength-to-weight ratio, good ductility, excellent creep resistance and fatigue strength, and very good impact strength at low temperatures. It has a higher tempering temperature and temper resistance compared to other alloys of similar composition. The high toughness and resistance to impact makes it an ideal choice for highly stressed parts and components, such as car axles, connecting rods and crankshafts, as well as for drive shafts and gear boxes.
The alloy AISI 4340 is an extremely popular grade and is usually supplied in hot-rolled condition. It is characterized by its excellent corrosion resistant properties, and its corrosion resistance can be further improved by various surface treatments. The alloy also has some high-temperature properties and can be used for applications where higher temperatures are expected during production.
AISI 4340, also known as EN24 or 1.6582, is one of the most popular and versatile alloy steels available on the market today. It has excellent weldability, machinability and can be readily heat treated. It offers very good toughness and impact strength at high temperatures, and its superior mechanical properties make it an ideal choice for many industries and applications, from automotive components to oil and gas applications. Its excellent strength-to-weight ratio and its resistance to fatigue make it a popular choice for many automotive and industrial applications, and it is the ideal material for many high-performance racing cars.
