AISI 1040

AISI 1040 is a medium carbon steel known for its good strength and wear resistance. It is commonly used in engineering applications requiring moderate strength and toughness.

Chemical Composition

- Carbon (C): 0.35% - 0.45%

- Manganese (Mn): 0.60% - 0.90%

- Silicon (Si): ≤ 0.40%

- Phosphorus (P): ≤ 0.035%

- Sulfur (S): ≤ 0.035%

Mechanical Properties

- Tensile Strength: 500 - 700 MPa

- Yield Strength: 300 - 450 MPa

- Elongation: 16% - 22%

- Hardness: 150 - 250 HB (as-rolled condition)

Heat Treatment

- Hardening: Can be heat treated to improve hardness by quenching in oil or water after heating to around 800-850°C.

- Tempering: Followed by tempering at 500-600°C to enhance toughness.

Applications

- Shafts

- Gears

- Crankshafts

- Machine parts

- Fasteners

Characteristics

- Good machinability

- Fair weldability

- Moderate strength

- Suitable for moderate load applications

AISI 1040 is a versatile steel grade suitable for various engineering applications due to its balanced mechanical properties and moderate strength.