AISI 4340 / EN 24
AISI 4340 and EN 24 are equivalent steel grades, widely used in various industries due to their excellent properties for high-strength applications. Let's delve into the specifics of these materials:
Steel Properties
Tensile Strength: AISI 4340 and EN 24 typically have a tensile strength of 745 MPa (108 ksi) in the normalized and tempered condition.
Yield Strength: The yield strength ranges from 470 to 670 MPa (68 to 97 ksi) depending on the heat treatment condition.
Elongation: Around 22% in a normalized and tempered condition.
Hardness: Typically, the hardness after heat treatment is around 28-32 HRC.
Application
Aerospace: Aircraft landing gear components, gears, and shafts.
Automotive: Transmission components, drive shafts, and engine parts.
Industrial: Crankshafts, heavy-duty machinery components, and forging dies.