KS SCM440 Steel — Specifications & Listings

KS D3867

KS SCM440 is a chromium molybdenum alloy steel per Korean Standard KS D3867, equivalent to JIS SCM440, AISI 4140 and EN19. It is widely used in quenched and tempered condition for high-strength shafts, gears and automotive components requiring good fatigue resistance.

Category: Alloy Steel

Grade Details

Grade	KS SCM440
Standard	KS D3867
Description	KS SCM440 is a chromium molybdenum alloy steel per Korean Standard KS D3867, equivalent to JIS SCM440, AISI 4140 and EN19. It is widely used in quenched and tempered condition for high-strength shafts, gears and automotive components requiring good fatigue resistance.
Applications	shafts,gears,axles,bolts,automotive parts,machine components,spindles,hydraulic parts

Equivalent / Similar Grades

Grade	Standard	Region
SCM440	JIS G4105	Japan
AISI 4140	AISI	USA
EN19	BS 970	UK
42CrMo4	DIN EN 10083	Germany
42CrMo4	EN 10083	Europe
42CrMo	GB/T 3077	China
42CD4	NF A35-551	France

Chemical Composition (%)

C	Si	Mn	P	S	Cr	Mo
0.38-0.43	0.15-0.35	0.60-0.85	<=0.030	<=0.030	0.90-1.20	0.15-0.30

Mechanical Properties

tensile_strength	900-1100 MPa
yield_strength	700-900 MPa
elongation	11-16 %
hardness	248-320 HB

Typical Available Sizes

Round Bar	16-500 mm
Flat Bar	20-150 mm

Sizes are indicative. Contact seller for exact availability.

Active KS SCM440 Listings on M-EX

No active KS SCM440 listings at this time.