SAE4340 Steel Round Bar Hot Rolled Annealed 228HB Hardness Free of Scale Surface Rectangular Bar
Price:
US $1,020-1,380 / T
MOQ:
1 Ton
Delivery Time:
Negotiable
Product Description
SAE4340 / 1.6511 Rectangular Bar - Hot Rolled Annealed
Material: SAE4340 per ASTM A322 • Condition: Hot Rolled Annealed • Hardness: 228HB • Surface: Free of Scale • Tolerances: ±1mm
Material Overview
SAE4340 (Grade 1.6511) offers exceptional strength, toughness, and hardenability with good resistance to overheating. This alloy steel exhibits high sensitivity to white points and temper brittleness, with welding requiring preheating and post-weld stress relief treatment.
Chemical Composition
| Element | Content (%) |
|---|---|
| C (Carbon) | 0.38-0.43 |
| Si (Silicon) | 0.15-0.35 |
| Mn (Manganese) | 0.60-0.80 |
| S (Sulfur) | ≤0.040 |
| P (Phosphorus) | ≤0.035 |
| Cr (Chromium) | 0.70-0.90 |
| Mo (Molybdenum) | 0.20-0.30 |
| Ni (Nickel) | 1.65-2.00 |
Key Features
- Excellent hardenability for uniform properties
- High toughness and impact resistance
- Superior heat and fatigue resistance
- Good anti-overheating stability
Applications
Ideal for high-stress components requiring exceptional toughness and strength, including:
- High-load axles and turbine shafts
- Helicopter rotor shafts (>250mm diameter)
- Turbojet engine turbine shafts and blades
- Heavy machinery transmission components
- Fasteners, crankshafts, and gears
- Components operating above 400°C
- Nitrided parts for specialized applications
Heat Treatment
| Process | Temperature | Cooling | Hardness |
|---|---|---|---|
| Quenching | 850°C | Oil | ≤269HB |
| Tempering | 600°C | Water/Oil |
Mechanical Properties
- Tensile Strength (σb): ≥980 MPa (100 kgf/mm²)
- Elongation (δ5): ≥12%
- Reduction of Area (ψ): ≥55%
- Impact Energy (Akv): >25 J
- Impact Toughness (αkv): ≥98 J/cm² (10 kgf·m/cm²)
Delivery Information
Condition: Hot rolled or forged, black surface
Stock Products: 15-20 days
Customized Products: 30-50 days
Additional Steel Products
Plastic Mold Steel
| DIN | AISI/SAE | JIS | GB | Plate Size (mm) | Round Bar (mm) | Process |
|---|---|---|---|---|---|---|
| 1.1210 | 1050 | S50C | 50# | 10-1000×155-2200×3000-6000 | Ø10-350×3000-6000 | Hot Rolled |
| 1.1191 | 1045 | S45C | 45# | 10-700×155-2200×3000-6000 | Ø10-300×3000-6000 | Hot Rolled |
| 1.2311 | P20 | PDS-3 | 3Cr2Mo | 12-800×155-2200×2000-6000 | Ø20-200×2000-6000 | Forged/Hot Rolled |
| 1.2738 | P20+Ni | - | 3Cr2NiMnMo | 21-1000×155-2200×2000-6000 | Ø20-200×2000-6000 | Forged/Hot Rolled |
| 1.2083 | 420 | - | 4Cr13 | 12-500×155-1200×2000-6000 | Ø12-300×3000-6000 | Forged/Hot Rolled |
Hot & Cold Work Mold Steel
| DIN | AISI/SAE | JIS | GB | Plate Size (mm) | Round Bar (mm) | Process |
|---|---|---|---|---|---|---|
| 1.2344 | H13 | SKD61 | 4Cr5MoSiV1 | 16-500×155-500×2000-6000 | Ø16-200×3000-6000 | Forged/Hot Rolled |
| 1.2379 | D2 | SKD10 | SKD10 | 6-200×155-810×2000-6000 | Ø10-180×3000-6000 | Forged/Hot Rolled |
| 1.2080 | D3 | SKD1 | 3Cr2Mo | 10-200×155-810×2000-6000 | Ø10-180×3000-6000 | Forged/Hot Rolled |
| 1.2510 | O1 | SKS3 | 9CrWMn | 10-200×155-810×2000-6000 | Ø20-200×3000-6000 | Forged/Hot Rolled |
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
Contact Person
Gao Ben