AISI 4140 / EN 19
AISI 4140 and EN 19 are equivalent steel grades, known for their versatility and widely used in various industries due to their excellent mechanical properties and suitability for a range of applications. Let's delve into the specifics of these materials:
Steel Properties
Tensile Strength: AISI 4140 and EN 19 typically have a tensile strength of 850-1000 MPa (123-145 ksi) in the normalized and tempered condition.
Yield Strength: The yield strength ranges from 640 to 850 MPa (93 to 123 ksi) depending on the heat treatment condition.
Elongation: Around 20% in a normalized and tempered condition.
Hardness: Typically, the hardness after heat treatment is around 28-32 HRC.
Application
Automotive: Axles, crankshafts, gears, and connecting rods.
Machinery: Shafts, bolts, studs, and tool holders.
Aerospace: Landing gear components and aircraft engine mounts.
General Engineering: Springs, cylinders, and forgings requiring high strength and toughness.