SAE4340 1.6511 Alloy Structure Steel Alloy Steel Round Bar

• Standard: DIN, JIS, AISI, GB
• Technics: Hot Rolled
• Application: Tool Steel Bar
• Surface: Black
• Alloy: Alloy
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Free Cutting Steel, Mold Steel
• Model NO.: SAE4340/1.6511/40CrNiMo/SNCM439
• Quality Assurance: 100% UT passed
• Heat Treatment: Annealing/Q+T
• Technology: Hot Rolled/Forged
• Payment term: TT/LC
• Shipment: 7days
• Condition: stock
• Transport Package: Standard/Customized
• Specification: standard/customized
• Trademark: customized
• Origin: China
• HS Code: 7225400000
• Production Capacity: 1000t/Month

Product Description

SAE4340 1.6511 Alloy Structure Steel Alloy Steel Round Bar 

Product Introduction
4340 alloy steel bar is used heavily in the aerospace industry due to its ultra-high strength. When heat treated it is known for its toughness while preserving good fatigue strength. For highly stressed parts it is excellent choice. It can be machined by all customary methods. This material is available in both vacuum melt (VM) and air melt (AM)

EN24 is a very high strength steel alloy which is hardened and tempered before supplying and has nickel, chromium, molybdenum making it high tensile steel strength, with good ductility and wear resistance. With relatively good impact properties at low temperatures, EN24 is also suitable for a variety of elevated temperature applications. EN24 round bars have good internal strength and high external strength, which makes it highly wear resistant. EN24 steel round bars offer good combination of ductility, strength and wear resistance. En24 is a very high strength alloy engineering steel.

Features
EN24 Engineering Steel is easy to treat and temper and is supplied hardened and tempered. The alloy offers a good combination of strength, ductility and wear resistance. It is a very high strength alloy engineering steel. 
Similar Standards

Chinese	American	German	Japanese	British
GB	AISI	DIN	JIS	BS
40CrNiMo	SAE4340	1.6511	SNCM439	EN24

Chemical Composition

Carbon	0.38-0.43
Manganese	0.60-0.80
Phosphorus (max)	0.035
Sulfur (max)	0.04
Silicon	0.15-0.35
Nickel	1.65-2.00
Chromium	0.70-0.90
Molybdenum	0.20-0.30

Heat Treatment

Quenching			Tempering
Heating Temperature/ºC	Cooling	Hardness/HRC	Heating Temperature/ºC	Cooling	Hardness/HRC
820-840	Oil	≥53	450-650	Air	25-40

Mechanical Properties

Tensile strength (psi)	105,000 - 115,000
Yield strength (psi)	75,000 - 85,000
Elongation in 2" (%)	20 - 30
Reduction of area (%)	35 - 45
Brinell Hardness (BHN)	210 - 240

Applications

• Aircraft Landing Gear
• Power Transmission Gears
• Structural Use Applications

Typical Applications:

• High strength shafts
• Punches & dies
• Drill bushings
• Retaining rings
• Gears

Stock Size

Plate	Thickness	20-120mm
	Width	2200mm
	Length	4000-10000mm
round bar	Diameter	16-450mm
	Length	4000-10000mm

Sizes and Conditions

Our steel materials are in different sizes and conditions specially catered to our customers' needs. They come in round bars,  flat bars, plates and block.
The conditions of the materials vary from pre-hardened, hot rolled,annealed, quenched and tempered to surface conditions such as black, pre-machined,griding and polish.