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Raian Ionescu

Material quality very good. we have cooperate more than 10 Years. They trade lots kinds of steel material. All material quality good. They duty for all material quality. We are planing continue cooperate with them in the future

Contact Person : Gao

Phone Number : 18068357371

Whatsapp : +8618068357371

Polished Surface High Tensile Strength 4340 Alloy Steel Round Bar for Mold Steel Applications

Minimum Order Quantity	1 Ton
Price	US $740-1,350 / Ton

Product Details

Diameter Range	16-600mm	Length Range	3000-6000mm
Carbon Content	0.37-0.44%	Silicon Content	0.17-0.37%
Manganese Content	0.50-0.80%	Phosphorus Content	≤0.025%
Sulfur Content	≤0.025%	Chromium Content	0.60-0.90%
Nickel Content	1.25-1.65%	Molybdenum Content	0.15-0.25%
Surface Treatment	Polished	Transport Package	Wooden Box
Production Capacity	500 Tons	Alloy Type	40CrNiMoA
HS Code	7219340000
Highlight	Polished Surface Alloy Steel Round Bar , High Tensile Strength 4340 Steel Round Bar , Mold Steel Application 40CrNiMoA Steel Round Bar

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Product Description

SNCM439 (SNCM8) Steel Round Bar - 40NiCrMo7 AISI 4340 40CrNiMoA Alloy

Hot rolled and forged 1.6582 4340 40CrNiMoA 34CrNiMo6 alloy steel rods designed for tool applications, offering exceptional strength and durability.

International 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 Details

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

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

Delivery Timeline

Standard stock items: 15-20 days

Customized products: 30-50 days

Full equipment capability including sawing, grinding, and polishing machines for custom specifications.

Additional Steel Products

DIN	AISI	JIS	GB	Flat Bar Thickness (mm)	Flat Bar Width (mm)	Flat Bar Length (mm)	Round Bar Diameter (mm)	Round Bar Length (mm)	Processing
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
1.2738	P20+Ni	-	3Cr2NiMnMo	21-300	155-2200	2000-8000	20-200	2000-6000
1.2379	D2	SKD10	SKD10	10-200	155-810	2000-6000	14-80	3000-6000
1.2080	D3	SKD1	3Cr2Mo	10-200	155-810	2000-6000	20-200	3000-6000
1.2083	420	-	4Cr13	10-500	155-1200	2000-6000	12-300	3000-6000
1.2344	H13	SKD61	4Cr5MoSiV1	10-500	155-1600	2000-6000	16-400	3000-6000
1.2510	O1	SKS3	9CrWMn	10-200	155-810	2000-6000	20-200	3000-6000
1.7225	SAE4140	SCM440	42CrMo	10-280	155-2200	2000-6000	16-450	3000-6000

Company Profile

We are a professional special steel company specializing in tool and die steel since 2005. Our comprehensive product range includes Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel, Stainless Steel, Carbon Steel, and Forged Blocks.

We maintain close partnerships with leading Chinese special steel manufacturers including Baosteel Group, Dongbei Special Steel, Changcheng Special Steel, Hongsheng Heavy Industry, Xingcheng Special Steel, and Daye Special Steel to ensure consistent high-quality products.

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