AISI 4340 EN24 DIN1.6511 40CrNiMo 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/EN24/40CrNiMo/SNCM439
• Quality Assurance: 100% UT passed
• Delivery condition: Hot Rolled, black surface
• Payment term: TT/LC
• Lead time: 7days
• Condition: ready stock
• Transport Package: Standard/Customized
• Specification: standard/customized
• Trademark: customized
• Origin: China
• HS Code: 7225400000
• Production Capacity: 1000t/Month

Product Description

AISI 4340 EN24 DIN1.6511 40CrNiMo Alloy Steel Round Bar

1. 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. 

2. Similar Standards

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

3. 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

4. Stock Size

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

5. 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

6. 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

7. Applications

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

8. Typical Applications:

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

 

9. Product picture

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