En24 Tool Steel Plate /AISI 4340 Alloy Steel Flat Bar, Rounds, Circle, 1.6511 Steel with Excellent Wear and Corrosion Resistance

• Customization: Available
• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Technique: Forged
• Shape: Plate
• Surface Treatment: Black or as Required
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Tool Steel Bar
• ASTM A29: 4340 Steel
• En 10250: 36CrNiMo4/1.6511 Steel
• BS 970: En24/817m40 Steel
• JIS G4103: Sncm 439 Steel
• Transport Package: Wooden
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7214100000
• Production Capacity: 5000 Ton/Year

Product Description

4340 alloy steel (also known as AISI 4340) is a low alloy steel with high toughness in an annealed state. 4340 alloy steel is characterized by its outstanding ductility, formability, and weldability rendering it an excellent metal for a variety of structural applications and components including power transmission gears and shafts, aircraft parts, and machinery.
 

Product Description

 

APPLICATION:

Steel adjusted for highly loaded parts such as crankshafts of aircraft engines, driving shafts, large-sized turbine components, gear wheels, rotors and discs of steam turbines. Also subject to impact, torsion and vibrations.

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:

MECHANICAL PROPERTIES:

Mechanical properties of a product with diameter d ≤ 16 mm
Property		Symbol		Unit		After heat treatment
Ultimate tensile strength		Rm		MPa		1200-1400
Yield stress		Re (Rp0.2)		MPa		≥ 1000
Elongation		A		%		≥ 9
Reduction of area		Z		%		≥ 40
Impact energy		KV		J		≥ 35
The influence of the element's 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	1100-1300		1000-1200		900-1100		800-950
Re (Rp0.2), MPa	≥ 900		≥ 800		≥ 700		≥ 600
A, %	≥ 10		≥ 11		≥ 12		≥ 13
Z, %	≥ 45		≥ 50		≥ 55		≥ 55
KV, J	≥ 45		≥ 45		≥ 45		≥ 45

TECHNOLOGICAL TREATMENT PROCESSES:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	(1050 - 850)
	Rolling		+	(1180 - 850)
Treatment	Heat treatment	Quenching	+	830-860/w,o
		Tempering	+	540 - 660
	Precipitation strengthening	Supersaturation	-	-
		Ageing	-	-
	Annealing	Normalising	+	(850 - 880)
		Soft annealing	+	(650 - 700)
Thermochemical treatment	Carburising		-	-
	Other		-	-

INTERNATIONAL STEEL GRADES:

ISO		European Union		Russia
34CrNiMo6	ISO 683-1 1987	34CrNiMo6	EN 10083-1 1996	~38Ch2N2MA	GOST 4543 1971
US		Japan		China
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