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Our supply of AISI 4340 steel round bars are in the range of 0.40 to 16 inches [10 to 405 mm]
Our supply of AISI 4340 steel plates are
in the range of 0.20 to 6 inches [5 to 150 mm]

AISI 4340 steel is a versatile and highly popular alloy known for its exceptional strength, toughness, and wear resistance. It belongs to the family of low-alloy steels and is primarily composed of iron, chromium, nickel, and molybdenum. AISI 4340 steel exhibits excellent hardenability, allowing it to be heat-treated to achieve desired mechanical properties. This steel is widely used in various industries, including aerospace, automotive, oil and gas, and machinery, where high strength and durability are critical. Its exceptional combination of strength and toughness makes it suitable for demanding applications such as gears, shafts, structural components, and crankshafts. Additionally, AISI 4340 steel can be easily machined and welded, further enhancing its versatility in manufacturing processes.

Chemical Properties

Mechanical Properties

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