AISI 4140 1.7225 42CrMo4 40hm Scm440 En19 709m40 Hot Forged Alloy Steel Round Bar

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Ferrous Steel Scrap
• Technique: Forged
• Shape: Bar
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Model NO.: Round bar
• Application: Tool Steel Bar
• Length: 2500-5500mm
• Transport Package: N/M
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7228400000
• Production Capacity: 5000ton/Month

Product Description

 

APPLICATION:

Steel susceptible to very loaded axles, shafts, crankshafts. Also subject to variable bending and torsional loads, gears, , etc.

TECHNOLOGICAL INFORMATION:

After soft annealing steel becomes machinable ( by improved shearability) and adjusted for the mechanical cutting.

SEMI-FINISHED PRODUCTS:

After soft annealing steel becomes machinable ( by improved shearability) and adjusted for the mechanical cutting.

CHEMICAL COMPOSITION:

C	Mn	Si	P	S	Cr	Ni	Mo	V	W	Ti	Cu	Inne
0,38 - 0,45	0,60 - 0,90	Max 0,40	Max 0,025	Max 0,035	0,90 - 1,20	-	0,15 - 0,30	-	-	-	-	-

MECHANICAL PROPERTIES:

Mechanical properties of a product with diameter d ≤ 16 mm
Property		Designation		Unit		After heat treatment
Ultimate tensile strength		Rm		MPa		1100-1300
Yield stress		Re (Rp0,2)		MPa		≥ 900
Elongation		A		%		≥ 10
Reduction of area		Z		%		≥ 40
Impact energy		KV		J		≥ 30
Effect of the cross-section on mechanical properties
Diameter d, mm Thickness of the flat bar t, mm	16 - 40 8 - 20		40 - 100 20 - 60		100 - 160 60 - 100		160 - 250 100 - 160
Rm, MPa	1000 - 1200		900 - 1100		800 - 950		750 - 900
Re (Rp0.2), MPa	≥ 750		≥ 650		≥ 550		≥ 500
A, %	≥ 11		≥ 12		≥ 13		≥ 14
Z, %	≥ 45		≥ 50		≥ 50		≥ 55
KV, J	≥ 35		≥ 35		≥ 35		≥ 35

TECHNOLOGICAL TREATMENT PROCESSES:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	(1050 - 850)
	Rolling		+	(1180 - 850)
Treatment	Heat treatment	Quenching	+	82-860/w,o
		Tempering	+	540 - 680
	Precipitation strengthening	Supersaturation	-	-
		Ageing	-	-
	Annealing	Normalising	+	(840 - 880)
		Soft annealing	+	(680 - 720)
Thermochemical treatment	Carburising		-	-
	Other		-	-

INTERNATIONAL STEEL GRADES:

ISO		European Union		Russia
42CrMo4	ISO 683-1 1987	42CrMo4	EN 10083-1 1996	~ 38ChM	GOST 4543 1971
US		Japan		China
~ 4140 H	ASTM A 193-96	~SCM4	JIS G 4105 1979	~ 42CrMo	GB 3077-88