Can you heat treat 4340?

Heat Treatment AISI 4340 alloy steel is heat treated at 830°C (1525°F) followed by quenching in oil.

What is the tensile yield strength of SAE 4340 heat treated steel?

930 – 1080 Mpa
4340 is a 1.8% nickel – chromium – molybdenum high hardenability high tensile steel – generally supplied hardened and tempered in the tensile range of 930 – 1080 Mpa (condition U) – (Rc 28 – 36).. Characterised by high strength and toughness in relatively large sections.

Does heat treating steel increase yield strength?

When properly performed, heat treating can greatly influence mechanical properties such as strength, hardness, ductility, toughness, and wear resistance. Most carbon steels and carbon alloy steels can be heat treated for the purpose of improving mechanical properties such as tensile and yield strength.

What is the Rockwell hardness of 4340 steel?

AISI 4340 Steel, normalized, 100 mm (4 in.) round

What is the hardness of 4340 alloy steel?

High-Strength 4340 Alloy Steel Rods. Yield Strength: 122, 000 psi. Hardness: Rockwell C20 (Hard) Heat Treatable: Yes. Max. Hardness After Heat Treatment: Rockwell C53. Use 4340 alloy steel for power transmission and structural applications that involve extreme impact, heat, and wear. For technical drawings and 3-D models, click on a part number.

Why is 4340 alloy used in air melt?

4340 alloy steel bar is used heavily in the aerospace industry due to its ultra-high strength. When heat treated it is known for its toughness while preserving good fatigue strength. For highly stressed parts it is excellent choice. It can be machined by all customary methods. This material is available in both vacuum melt (VM) and air melt (AM).

What can I use SAE AISI 4340 steel for?

SAE AISI 4340 steel is usually used in places where severe conditions exist and heavy parts requiring high strength, and can be widely used as billet, bar, bar, forging, sheet, pipe and welding wire. AISI 4340 steel can also be produced as light plates and castings. Typical applications include bolts, screws and other fasteners.

What’s the temperature of annealing for steel 4340?

The alloy usually comes in the annealed condition unless specified otherwise. The standard annealing process for Steel 4340 starts at 1525 °F (830 °C), followed by cooling to 1350 °F (730 °C), and furnace cooling to 1130 °F (610 °C) at 11 °F (20 °C) per hour, followed by air cooling to room temperature.