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Polished Surface AISI 4340 Alloy Steel Round Bar with High Tensile Strength for Mold Steel Applications
Product Details
| Model NO. | 4340 | Surface Treatment | Polished |
|---|---|---|---|
| Alloy Type | Alloy | Diameter Range | 6-630mm |
| Round Bar Diameter | 16-600mm | Plate Thickness | 16-200mm |
| Plate Width | 200-800mm | Length Range | 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% |
| Production Capacity | 500tons | ||
| Highlight | Polished Surface Alloy Steel Round Bar,High Tensile Strength 4340 Steel Bar,Mold Steel Application 40CrNiMoA Steel Rod |
||
Product Description
AISI 4340 Forged Alloy Steel Round Bar
Hot rolled and forged 1.6582 4340 40CrNiMoA 34CrNiMo6 alloy steel rod for industrial tools and applications.
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 shafts
- Rotor shafts and turbine blades
- Critical components requiring 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 products: 15-20 days
Customized products: 30-50 days
Full equipment capability including sawing, grinding, and polishing machines for custom specifications.
Additional Steel Products Available
Changfeng Tool & Die Steel offers comprehensive range including Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel, Stainless Steel, Carbon Steel and Forged Blocks.
Quality Assurance
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.
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