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AISI 8640 Round Bar / SAE 8640 Rods / 8640 Alloy Steel Bar / 8640 Rings
385.0 INR/Kilograms
Product Details:
- Type Round Bar, Rods, Flats, Rings
- Material AISI 8640 Alloy Steel
- Tolerance H9, H11, K12 or as per customer
- Grade 8640
- Standard ASTM A29, ASTM A322, SAE J404
- Application Automotive, Engineering, Oil & Gas, Machinery Components, Shafts, Gears
- Diameter 6 mm to 350 mm
- Click to view more
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AISI 8640 Round Bar / SAE 8640 Rods / 8640 Alloy Steel Bar / 8640 Rings Price And Quantity
- 385.0 INR/Kilograms
- 100 Kilograms
AISI 8640 Round Bar / SAE 8640 Rods / 8640 Alloy Steel Bar / 8640 Rings Product Specifications
- AISI 8640 Alloy Steel
- Round Bar, Rods, Flats, Rings
- Forged, Rolled, Heat Treated, Annealed
- 2 to 6 meters (customized on request)
- Bright, Polished, Black, Peeled
- Hot Rolled / Cold Drawn
- 6 mm to 350 mm
- Automotive, Engineering, Oil & Gas, Machinery Components, Shafts, Gears
- ASTM A29, ASTM A322, SAE J404
- H9, H11, K12 or as per customer
- 8640
- Precision Components, Heavy-duty Parts
- 30 Joules (Min)
- Customized sizes available upon request
- 690 MPa (min)
- 197-241 HB (Annealed)
- 785 - 930 MPa (min)
- 16% (min)
- Annealed, Normalized, Quenched & Tempered
- C: 0.38-0.43%, Mn: 0.75-1.00%, Si: 0.15-0.30%, Cr: 0.40-0.60%, Ni: 0.40-0.70%, P: 0.035%, S: 0.040%
- Smooth, Scale-Free, Machined
- Hot Rolled/Cold Finished/Annealed
Product Description
Based on the product you are currently editing for JAYANT IMPEX on your Add/Edit Products page, here is the technical breakdown for AISI 8640 Alloy Steel Round Bars, Rods, and Rings.
This information is tailored to help you update your Product Description and Specifications to attract high-end industrial buyers.
Technical Overview
AISI 8640 is a medium-carbon Nickel-Chromium-Molybdenum alloy steel (often called "Triple Alloy" steel). It is designed for components requiring a high level of toughness and strength. The 0.40% carbon content allows it to be heat-treated to a higher hardness than the 8620 or 8630 grades, making it ideal for heavy-duty structural applications.
Key Specifications & Properties
| Feature | Details |
| Standard | ASTM A29 / SAE J404 |
| Material Type | Ni-Cr-Mo (Nickel-Chromium-Molybdenum) Alloy Steel |
| Chemical Composition | Nickel (0.40% 0.70%), Chromium (0.40% 0.60%), Molybdenum (0.15% 0.25%) |
| Tensile Strength | $850 - 1000 text{ MPa}$ (Quenched & Tempered) |
| Yield Strength | $ge 550 text{ MPa}$ |
| Hardness | $200 - 240 text{ HBW}$ (Annealed) |
Versatile Alloy Steel Solutions
AISI 8640 alloy steel products are engineered to deliver high performance across automotive, oil & gas, and heavy-duty machinery industries. The range, including round bars, rods, flats, and rings, is available in multiple thicknesses and customizable lengths. With precise mechanical strengths and superior surface finishes, these materials meet stringent industry demands for durability and accuracy.
Flexible Processing and Surface Finishes
These steel bars and rings undergo various processes such as forging, rolling, heat treatment, and annealing. Customers can select from hot rolled, cold drawn, bright, polished, black, peeled, or machined finishes for optimal appearance and performance. Strict tolerance controls (H9, H11, K12) ensure components fit seamlessly into precision assemblies.
FAQ's of AISI 8640 Round Bar / SAE 8640 Rods / 8640 Alloy Steel Bar / 8640 Rings:
Q: How is AISI 8640 alloy steel bar typically processed for optimal performance?
A: AISI 8640 bars are processed via forging, rolling, and then subjected to heat treatments like annealing, normalizing, quenching, and tempering. This ensures enhanced mechanical properties, tailored for heavy-duty and precision-demanding applications.Q: What applications benefit most from using 8640 alloy steel rods and rings?
A: Applications requiring high strength and good toughness-such as automotive gears, engineering machinery, oil and gas rigs, shafts, and heavy-duty components-benefit significantly from AISI 8640's superior properties and reliable performance.Q: When should a hot rolled versus a cold finished 8640 steel bar be selected?
A: Choose hot rolled bars for general engineering uses where dimensional tolerance is less critical. Cold finished or cold drawn bars are preferred for precision components or where a smooth, scale-free surface and tighter tolerances are required.Q: Where are AISI 8640 alloy steel products commonly supplied and used?
A: These steel products are widely supplied throughout India to manufacturers, fabricators, traders, and end-users in industries like automotive, engineering, and oil & gas who demand robust performance and customizable sizing options.Q: What are the advantages of using 8640 alloy steel bars over standard carbon steel bars?
A: 8640 alloy steel offers increased tensile and yield strengths, better impact resistance (30 Joules minimum), and superior toughness due to its precise alloying of chromium, nickel, and molybdenum, making it preferable for critical, high-load components.Q: How can the size and shape of 8640 alloy steel bars be customized?
A: Manufacturers and suppliers offer customization in diameter (6 mm to 350 mm), length (2 to 6 meters or as requested), as well as different cross-sections-round bars, rods, flats, or rings-suited to specific project requirements.Q: What is the typical supply condition and surface finish for AISI 8640 round bars?
A: Bars can be delivered hot rolled, cold finished, or annealed, with surface options such as bright, polished, black, peeled, or machined to customer needs. All products are supplied in a scale-free, smooth condition to ensure optimal usability.Tell us about your requirement
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