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SAE AISI 4340 Alloy Steel Chrome Moly Bars
195.0 INR/Kilograms
Product Details:
- Standard ASTM A29/A29M, ASTM A322, JIS G4103, EN 10083-3
- Material SAE AISI 4340 Alloy Steel Chrome Moly
- Type Bars / Rods
- Specific Use Machine Components, Structural Components, High-stress Parts
- Grade 4340
- Processing Q&T (Quenched and Tempered), Annealed, Normalized
- Tolerance H8, H9, H10, or as per requirement
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SAE AISI 4340 Alloy Steel Chrome Moly Bars Price And Quantity
- 195.0 INR/Kilograms
- 1000 Kilograms
SAE AISI 4340 Alloy Steel Chrome Moly Bars Product Specifications
- 10mm to 300mm
- Automotive, Aerospace, Forging, Shafts, Gears, Heavy-duty parts
- Machine Components, Structural Components, High-stress Parts
- 4340
- Hot Rolled / Cold Drawn
- Q&T (Quenched and Tempered), Annealed, Normalized
- H8, H9, H10, or as per requirement
- ASTM A29/A29M, ASTM A322, JIS G4103, EN 10083-3
- 1 meter to 6 meters or Customized
- Bright, Black, Peeled, Polished, Turned
- Bars / Rods
- SAE AISI 4340 Alloy Steel Chrome Moly
- Available as per customer specification
- Round, Square, Hexagonal
- >47 J (at -20C)
- 28-32 HRC (Q&T Condition)
- 930 MPa - 1080 MPa
- Moderate (with suitable coating treatment)
- 785 MPa (minimum)
- Good
- 18% (minimum)
- Defect-free, Ultra Sonic Tested (if requested)
- Bundled, Plastic Wrapped, Export Worthy Packing
Product Description
| Feature | Specification Details |
| Material Grade | AISI 4340 / SAE 4340 / UNS G43400 |
| Equivalent Grade | EN24, 36CrNiMo4, SNCM439 |
| Standard | ASTM A29, AMS 6415, AMS 6414 (VAR) |
| Diameter Range | 10mm to 900mm |
| Heat Treatment | Hardened & Tempered (Supplied in T, U, or V condition) |
| Hardness | 250 350 HB (Hardened & Tempered condition) |
| Tensile Strength | 930 1080 MPa (Typical) |
Professional Product Description
Copy and paste this into your "Product Description" box:
SAE AISI 4340 Alloy Steel Round Bars are high-strength, low-alloy steels characterized by their exceptional toughness and ductility, even in large sections. The addition of Nickel sets this grade apart, providing better fracture toughness and hardenability than 4140 or 16Mo3. Often supplied in the pre-hardened and tempered condition, these bars are ready for high-stress applications without further heat treatment.
Key Performance Features:
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Superior Through-Hardening: Uniform hardness and strength across the entire cross-section of large diameter bars.
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Extreme Toughness: High resistance to shock and impact, making it ideal for safety-critical components.
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Excellent Fatigue Strength: Engineered to withstand cyclic loading and heavy-duty mechanical stress.
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Versatile Finishing: Can be further surface hardened via nitriding or induction for maximum wear resistance.
Common Applications:
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Aerospace landing gear and high-stress structural parts.
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Heavy-duty power transmission gears and shafts.
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Forged steel crankshafts, axles, and spindles.
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High-pressure hydraulic components and oil & gas drilling tools.
Superior Mechanical Properties
These chrome-moly steel bars are engineered to deliver excellent strength, toughness, and ductility. With high tensile and yield values, combined with reliable elongation and impact resistance even at subzero temperatures, they suit high-stress environments. The Q&T condition further enhances the mechanical profile for critical automotive and aerospace parts.
Flexible Processing and Customization
Bars can be processed via hot-rolling or cold-drawing to different shapes and dimensions, from 10mm to 300mm diameter in lengths up to 6 meters. Customers may choose from Q&T, annealed, or normalized processing, with tailored heat treatment and tight dimensional tolerances (H8, H9, H10, or as required) to meet specific project needs.
Certifications and Quality Assurance
SAE AISI 4340 bars comply with international standards including ASTM A29/A29M, ASTM A322, JIS G4103, and EN 10083-3. Each bar undergoes thorough inspection for defect-free surfaces and can be ultra-sonic tested upon request. Export-worthy packaging ensures safe delivery globally, with supply available by manufacturers, dealers, exporters, and fabricators across India.
FAQ's of SAE AISI 4340 Alloy Steel Chrome Moly Bars:
Q: How are SAE AISI 4340 Alloy Steel Chrome Moly Bars produced and finished?
A: These bars are produced via hot-rolled or cold-drawn techniques and offered in round, square, and hexagonal forms. They undergo heat treatments like quenching and tempering, annealing, or normalizing, depending on customer specifications. Surface finishes include bright, black, peeled, turned, or polished, ensuring defect-free and precise products.Q: What applications benefit most from 4340 Q&T alloy steel bars?
A: SAE AISI 4340 bars are well suited for automotive, aerospace, forging, machinery shafts, gears, and other high-duty applications that demand excellent strength, good ductility, and high impact resistance, even at low temperatures. They are commonly used for components facing severe mechanical stress.Q: When is ultrasonic testing recommended for these bars?
A: Ultrasonic testing is recommended when critical structural integrity is required, such as in aerospace or safety-related automotive components. This testing can be provided upon request to ensure the bars are free from internal defects, offering additional reliability for demanding applications.Q: Where can these alloy steel bars be sourced in India?
A: SAE AISI 4340 alloy steel chrome moly bars are available from reputable manufacturers, suppliers, exporters, dealers, producers, and fabricators throughout India. Export-worthy packaging enables both domestic and international delivery.Q: What is the corrosion resistance level of these bars and can it be improved?
A: SAE AISI 4340 bars offer moderate corrosion resistance, which is usually sufficient for general use. For enhanced performance in corrosive environments, suitable coatings or treatments-such as plating or painting-can be applied to maximize longevity.Q: How do customers specify the size, length, and tolerance required?
A: Customers can order sizes between 10mm and 300mm diameter and lengths from 1 to 6 meters, or request a custom length. Tolerances such as H8, H9, H10, or custom tolerances can also be specified to fit particular application demands, ensuring precise fit and performance.Q: What are the key benefits of using SAE AISI 4340 alloy steel bars?
A: Key advantages include high strength, dependable impact toughness, good fatigue resistance, fine machinability, and the ability to tailor heat treatment. This makes them a preferred choice for high-stress, mechanically demanding components in automotive, aerospace, and heavy machinery sectors.Tell us about your requirement
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