Heat Treating 4340 Alloy Steel

Pacific 4340 is available in two conditions.

Heat treating 4340 alloy steel.

Atlas 4340 is a nominally 1 8 percent nickel chromium molybdenum low alloy steel of high hardenability with high strength and toughness in relatively large sections achieved with a quench and temper heat treatment. Aisi 4340 is a nickel chromium molybdenum alloy steel specification widely used in the oil and gas sectors. Premium aircraft quality is intended for. Flame or induction hardening.

4340 has been used typically for parts requiring a through hardening capability up to 3 5 inches 89 mm in nominal thickness at time of heat treatment and subject to rigid magnetic particle inspection standards but usage is not limited to such applications. As a quality grade alloy steel it offers toughness and high strength in the heat treated condition with good fatigue strength. Regarded industry wide for its toughness 4340 supplies high strength in the heat treated condition while still maintaining excellent fatigue strength over time. Commercial and military aircraft automotive systems forged hydraulic and other machine tool applications forged steel crankshafts.

It has high ductility. For technical drawings and 3 d models click on a part number. Aisi sae 4340 alloy steel 4340 is a nickel chromium molybdenum alloy steel known for its toughness and its ability to attain high strengths in the heat treated condition. Aisi 4340 alloy steel aisi 4340 steel stockholders and suppliers delivering to the whole of the uk.

4340 alloy steel applications. A contemporary alternative to 4340 is atlas 6582 through hardening steel that has improved through hardening characteristics and. Heat to 845 to 900 c 1550 to 1650 f and hold for a period of time which depends on the thickness of the section. Alloy steel 4340 heat treatment including.

4340 heat treated hot rolled cold finished. Use 4340 alloy steel for power transmission and structural applications that involve extreme impact heat and wear. Certificates with a traceable lot number are available for these products. Aisi 4340 alloy steel is heat treated at 830 c 1525 f followed by quenching in oil.

Heat treated quenched and tempered to high strength or annealed for ease of machining and subsequent heat treatment. Aisi 4340 is a heat treatable low alloy steel containing nickel chromium and molybdenum. The inclusion of nickel improves hardenability. Aisi 4340 alloy steel is heat treated at 830 c 1525 f followed by quenching in oil.

It can be through hardened in large sections. Normalizing annealing hardening tempering spheroidization stress relief etc. It is a nickel chromium molybdenum medium carbon alloy steel with deep hardenability. Aisi 4340 alloy steel can be cold worked using all conventional methods in the annealed condition.

4340 steel heat treatment. Aisi 4340 alloy steel is forged at 427 to 1233 c 1800 to 2250 f.