ASTM A322 SAE4140 Alloy Steel Round Bar Hot Rolled 0.38-0.43% Carbon 1020 MPa Tensile Strength
Price:
600-850 USD/Ton
MOQ:
1 Ton
Delivery Time:
5 - 12 days based on the quantity
Brand:
DELTA
Product Description
ASTM A322 SAE4140 Alloy Steel Round Bar
AISI 4140 alloy steel is a chromium-molybdenum-manganese low alloy steel offering exceptional mechanical properties including high fatigue strength, abrasion resistance, impact toughness, and torsional strength. This hot-rolled round bar is suitable for custom sizing and meets multiple international standards.
Key Specifications
| Property | Value |
|---|---|
| Standard | ASTM A322, SAE 4140, AISI 4140 |
| Technique | Hot rolled, forged, cold drawn |
| Surface Treatment | Clean, black rough, milled, grinding, painting |
| Thickness Tolerance | ±0.15mm |
| MOQ | 1-25 tons (sample orders accepted) |
| Shipping Time | 15-20 days after deposit/L/C |
| Annual Capacity | 12,000 tons |
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.38-0.43 |
| Silicon (Si) | 0.15-0.35 |
| Manganese (Mn) | 0.75-1.00 |
| Chromium (Cr) | 0.80-1.10 |
| Molybdenum (Mo) | 0.15-0.25 |
| Phosphorus (P) | ≤0.035 |
| Sulfur (S) | ≤0.040 |
Mechanical Properties
| Condition | Tensile Strength | Yield Strength | Hardness |
|---|---|---|---|
| Normalized (870°C) | 1020 MPa (148 ksi) | 655 MPa (95 ksi) | 302 HB |
| Annealed (815°C) | 655 MPa (95 ksi) | 414 MPa (60 ksi) | 197 HB |
| Quenched & Tempered (540°C) | 1075 MPa (156 ksi) | 986 MPa (143 ksi) | 311 HB |
Applications
- Motor shafts, pump shafts, hydraulic shafts
- Lathe spindles, milling spindles
- Forged gears and high-strength bolts
- Aerospace components and oil & gas equipment
- Valve bonnets, screws, nuts, and torsion bars
Heat Treatment Options
| Process | Temperature Range | Resulting Hardness |
|---|---|---|
| Normalizing | 870°C (1600°F) | 302 HB |
| Annealing | 790-845°C (1455-1555°F) | 197 HB |
| Quenching | 830-845°C (1525-1555°F) | Oil cooling |
| Tempering | 204-649°C (400-1200°F) | 28-58 HRC |
International Equivalents
| Region | Standard | Grade |
|---|---|---|
| USA | ASTM A29/A29M | 4140 (G41400) |
| European Union | EN 10083-3 | 42CrMo4 (1.7225) |
| China | GB/T 3077 | 42CrMo |
| Japan | JIS G4105 | SCM440 |
Product Images
Similar Products
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