4340/40crnimo/ Sncm439/1.6511/En24 Special Steel Round Bar

• Customization: Available
• Standard: DIN, JIS, AISI, ASTM, GB
• Technics: Hot Rolled
• Surface: Black
• Alloy: Alloy
• Special Use: Mold Steel
• Length: 3000-6000mm
• Quality Gurantee: 100% Ut Passed
• Mtc: En10204 3.1
• Transport Package: Standard Sea Worthy
• Specification: 20-500mm on stock
• Trademark: Xiang Steel, Daye
• Origin: China
• HS Code: 7225409900
• Production Capacity: 1000ton/Month

Product Description

4340/40crnimo/ Sncm439/1.6511/En24 Special Steel Round Bar

Product Introduction

EN24 equivalent 40CrNiMo, which is China standard grade, can be AISI 4340, Din 36CrNiMo4, W-Nr 1.6511 equivalent as well. Generally speaking, they can be equivalent each other if not very special application condition.

Most customer purchase 40CrNiMo as EN24 equivalent, especially customer from British, Middle east, and Africa. We sell large quantity to such district big quantity each year. China standard 40CrNiMo are widely accepted as EN24 equivalent and other grade SAE 4340, Din 36CrNiMo4, and W-Nr 1.6511 word wide for reasons as following:
Mechanical Performance for 40CrNiMo and EN24 steel are similar.
Price for 40CrNiMo is much cheaper compared other mentioned grade above
40CrNiMo is the most widely used engineering alloy steel in China, usage is huge, stock is always enough, can support quickly shipment.
China standard steel quality is good, and qualified at almost all condition EN24, SAE 4340, Din 36CrNiMo4, and W-Nr 1.6511 applied.

Equal Standards
 

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

Chemical Composition

Grades	C		Si	Mn	P	S	Cr	Mo	Ni
AISI 4340	0.38-0.43		0.15-0.35	0.6-0.8	≤0.035	≤0.040	0.70~0.90	0.20~0.30	1.65~2.00
GB 40CrNiMo		0.37~0.44	0.17~0.37	0.50~0.80	≤0.025	≤0.025	0.60~0.90	0.15~0.25	1.25~1.65
40NiCrMo7	0.37-0.44		0.15-0.4	0.5-0.8	≤0.035	≤0.035	0.60~0.90	0.2-0.3	1.6-1.9
W.Nr. 1.6511	0.35~0.45		≤0.40	0.60~0.80	≤0.035	≤0.040	0.90~1.20	0.15~0.30	1.40~1.70

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
High strength shafts
Punches & dies
Drill bushings
Retaining rings
Gears
Available stock size

Plate	Thickness	20-120mm
	Width	2200mm
	Length	4000-10000mm
round bar	Diameter	20-500mm
	Length	3000-6000mm

Why choose us?
One-Stop Solution
We have thousands of total production experience, from raw materials to finished products.
Competitive Price
Large scale purchase, standardized production process and efficient management make our price competitive.
Quick Shipping
Years of export experience enable us to control the transportation time more accurately.
Quality Control
The standardized production process, comprehensive management system, professional testing equipment
Special material customization
We support the customization of various complex materials
OEM/ODM
We support any form of OEM/ODM customization requirements.