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Raian IonescuMaterial 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
4340 Steel Round Bar - High Strength, Corrosion Resistant Alloy Steel with Shock Resistance
Product Details
| Model Number | 4340 | Surface Treatment | Polished |
|---|---|---|---|
| Diameter Range | 6-630mm | Production Capacity | 500tons |
| Round Bar Diameter | 16-600mm | Plate Thickness | 16-200mm |
| Plate Width | 200-800mm | Length | 3000-6000mm |
| 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% |
| Sulfur Content | ≤0.025% | ||
| Highlight | High Strength 4340 Steel Round Bar,Corrosion Resistant Alloy Steel Round Bar,Shock Resistance 4340 Alloy Steel |
||
Product Description
4340 Steel Round Bar - Alloy Steel Round Bar 4340
Hot rolled and forged 1.6582 4340 40CrNiMoA 34CrNiMo6 alloy steel rod for tool applications, offering exceptional strength and durability for demanding industrial use.
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 Form | 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)
40ft Container: Gross Weight 27T (11.8m × 2.13m × 2.18m)
Delivery Timeline
Standard products: 15-20 days
Customized products: 30-50 days
Full equipment capability including sawing, grinding, and polishing machines for custom specifications
Customized products: 30-50 days
Full equipment capability including sawing, grinding, and polishing machines for custom specifications
About Changfeng Tool & Die Steel
Professional special steel company specializing in steel products since 2005. Our 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.
Professional special steel company specializing in steel products since 2005. Our 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 steel enterprises including Baosteel Group, Dongbei Special Steel, Changcheng Special Steel, Hongsheng Heavy Industry, Xingcheng Special Steel, and Daye Special Steel to ensure premium quality standards.
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