G400026 (4340 Form3)

Alloy Steel

4340 Form3

Versatile low-alloy structural and engineering steel for demanding mechanical applications.

Chemical Composition (%)

C0.37
CR0.6
MN0.55
MO0.2
NI1.65

Mechanical Properties

Yield:355MPa; Tensile:575MPa; Elong:33%; 177HB

Chinese Standard

AISI/SAE

Applications

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

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