4140 QT

Alloy Steel

AISI 4140 Quenched & Tempered

Quenched and tempered 4140 for high-strength applications.

Chemical Composition (%)

C0.37
CR0.75
MN0.65
MO0.15
SI0.15

Mechanical Properties

Yield:535MPa; Tensile:835MPa; Elong:29%; 58HRC

Chinese Standard

AISI/SAE

Applications

Shafts, gears, axles, bolts, connecting rods, crankshafts, forgings

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