4340 H

Alloy Steel

AISI 4340 (H-series)

H-series 4340 optimized for hollow-section and tubular applications.

Chemical Composition (%)

C0.37
CR0.6
MN0.55
MO0.2
NI1.65
SI0.15

Mechanical Properties

Yield:470MPa; Tensile:745MPa; Elong:22%; 217HB

Chinese Standard

AISI/SAE

Applications

Tubular products, hollow shafts

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