JIANGSU MITTEL STEEL INDUSTRIAL LIMITED

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Hot Rolled SAE4340 Alloy Steel Round Bar with Polished Surface for Mold Steel

China Hot Rolled SAE4340 Alloy Steel Round Bar with Polished Surface for Mold Steel

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Hot Rolled SAE4340 Alloy Steel Round Bar with Polished Surface for Mold Steel

MOQ： 1 Ton
Price： US $1,030-1,450 / T
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Material Grade	SAE4340
Surface Treatment	Polished
Diameter Range	6-630mm
Length Range	3000-6000mm
Hardness	228HB max
Carbon Content	0.37-0.44%
Silicon Content	0.17-0.37%
Manganese Content	0.50-0.80%
Chromium Content	0.60-0.90%
Nickel Content	1.25-1.65%
Molybdenum Content	0.15-0.25%
Phosphorus Content	≤0.025%
Sulfur Content	≤0.025%
Production Capacity	500 tons
Tolerance Standard	H11

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Product Details
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Product Specification


Material Grade	SAE4340	Surface Treatment	Polished
Diameter Range	6-630mm	Length Range	3000-6000mm
Hardness	228HB max	Carbon Content	0.37-0.44%
Silicon Content	0.17-0.37%	Manganese Content	0.50-0.80%
Chromium Content	0.60-0.90%	Nickel Content	1.25-1.65%
Molybdenum Content	0.15-0.25%	Phosphorus Content	≤0.025%
Sulfur Content	≤0.025%	Production Capacity	500 tons
Tolerance Standard	H11
High Light	Hot Rolled Alloy Steel Round Bar ，Polished Surface 4340 Steel Bar ，Mold Steel Application SAE4340 Steel Rod

ASTM A29/A29m Material SAE4340 Hot Rolled Round Bar

Annealed 228HB Max Surface Peeled Tolerances H11 Length 3-4 Meter

Hot Rolled / Forged 1.6582 4340 40CrNiMoA 34CrNiMo6 Alloy Steel Rod for Tools

Similar Grade Equivalents

GB	AISI	DIN	JIS	EN	TOCT	ISO
40CrNiMoA	4340	1.6582	SNCM439	41NiCrMo 7-3-2	40XH2MA (40XHMA)	36CrNiMo4

Product Specifications

Product Type	Diameter/Thickness (mm)	Width (mm)	Length (mm)
Round Bar	16-600	/	3000-6000
Plate	16-200	200-800	3000-6000

Custom specifications available upon request

Chemical Composition

Grade	C	Si	Mn	P	S	Cr	Ni	Mo
40CrNiMo	0.37-0.44%	0.17-0.37%	0.50-0.80%	≤0.025%	≤0.025%	0.60-0.90%	1.25-1.65%	0.15-0.25%
4340	0.38-0.43%	0.15-0.35%	0.60-0.80%	≤0.035%	≤0.040%	0.70-0.90%	1.65-2.00%	0.20-0.30%

Key Features

Chromium molybdenum alloy steel construction
High strength and exceptional toughness
Excellent hardenability stability and anti-overheating properties
Superior high tensile strength with outstanding shock resistance

Typical Applications

Heavy machinery and high-load shaft components
Rotor shafts and turbine blades
Critical parts requiring special performance after nitriding treatment

Packaging Specifications

20ft Container: Gross Weight 27T (5.80m × 2.13m × 2.18m)
40ft Container: Gross Weight 27T (11.8m × 2.13m × 2.18m)

Delivery Time

Standard Products: 15-20 days (abundant stock available)
Customized Products: 30-50 days
Full equipment capability including sawing, grinding, and polishing machines for custom specifications

Additional Product Range

Changfeng Tool & Die Steel Main Products

DIN	AISI	JIS	GB (China)	Flat Bar Thickness (mm)	Flat Bar Width (mm)	Flat Bar Length (mm)	Round Bar Diameter (mm)	Round Bar Length (mm)	Manufacturing Process
1.121	SAE1050	S50C	50#	10-450	155-2200	2000-12000			Forged, Hot Rolled
1.2311	P20	PDS-3	3Cr2Mo	10-460	155-2200	2000-10000	20-200	2000-6000	Forged, Hot Rolled
1.2738	P20+Ni	-	3Cr2NiMnMo	21-300	155-2200	2000-8000	20-200	2000-6000	Forged, Hot Rolled
1.2379	D2	SKD10	SKD10	10-200	155-810	2000-6000	14-80	3000-6000	Forged, Hot Rolled
1.2080	D3	SKD1	3Cr2Mo	10-200	155-810	2000-6000	20-200	3000-6000	Forged, Hot Rolled
1.2083	420	-	4Cr13	10-500	155-1200	2000-6000	12-300	3000-6000	Forged, Hot Rolled
1.2344	H13	SKD61	4Cr5MoSiV1	10-500	155-1600	2000-6000	16-400	3000-6000	Forged, Hot Rolled
1.2510	O1	SKS3	9CrWMn	10-200	155-810	2000-6000	20-200	3000-6000	Forged, Hot Rolled
1.7225	SAE4140	SCM440	42CrMo	10-280	155-2200	2000-6000	16-450	3000-6000	Forged, Hot Rolled

Company Profile

We are a professional special steel company specializing in this industry in China since 2005. Our main products include Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel, Stainless Steel, Carbon Steel and Forged Blocks.

To ensure high quality products for our customers, we maintain close cooperation with many Chinese first-class special steel enterprises, including Baosteel Group, Dongbei Special Steel, Changcheng Special Steel, Hongsheng Heavy Industry, Xingcheng Special Steel and Daye Special Steel.

Company Details

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Business Type:

Manufacturer,Distributor/Wholesaler,Exporter 
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Total Annual:

>1000000
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Employee Number:

>100 
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Ecer Certification：

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Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...

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JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
https://www.stainless-strips.com/

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