GB/T 3077 42CrMo Steel — Specifications & Listings

GB/T 3077

Chromium-molybdenum alloy steel with high strength, toughness and fatigue resistance after heat treatment. Suitable for heavily loaded engineering and automotive components.

Category: Alloy Steel

Grade Details

Grade	GB/T 3077 42CrMo
Standard	GB/T 3077
Description	Chromium-molybdenum alloy steel with high strength, toughness and fatigue resistance after heat treatment. Suitable for heavily loaded engineering and automotive components.
Applications	gears, heavy shafts, axles, bolts, pressure vessels, forgings

Equivalent / Similar Grades

Grade	Standard	Region
AISI 4140	AISI	USA
42CrMo4	DIN EN 10083	Germany
SCM440	JIS G4105	Japan
708M40	BS970	UK

Chemical Composition (%)

C	Si	Mn	S	P	Cr	Mo
0.38-0.45	0.17-0.37	0.50-0.80	<=0.035	<=0.035	0.90-1.20	0.15-0.25

Mechanical Properties

tensile_strength	>=1080 MPa
yield_strength	>=930 MPa
elongation	>=12%
hardness	<=217 HB
impact_energy	>=63 J

Typical Available Sizes

Round Bar	16-600 mm dia
Flat Bar	25-400 mm width

Sizes are indicative. Contact seller for exact availability.

Active GB/T 3077 42CrMo Listings on M-EX

No active GB/T 3077 42CrMo listings at this time.