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Item #:
152218012
OnlineMetals 4340 Alloy Steel Round Bar, Unpolished (Mill) Finish, Cold Finish, Normalized, AMS 6415, 0.5" Diameter, 12" Length
Item #:
152218012
ZMW 1290
Price Details
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Imported from USA store
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4340 Alloy Steel Round Bar excels with high strength, toughness, wear resistance, and fatigue strength.
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What Stands Out
High Strength
The 4340 alloy offers exceptional strength and toughness, making it ideal for applications that require durability under high stress and extreme conditions.
Precision Sizing
With a precise 0.5-inch diameter and 12-inch length, this round bar is perfect for custom fabrication, ensuring compatibility with a wide range of projects and specifications.
Versatile Finish
The unpolished, cold-finished surface allows for better adhesion in coatings and finishes, providing flexibility for various machining and manufacturing applications without compromising quality.
Product Details
- 4340 steel is easily weldable, has high strength, toughness, wear resistance, and fatigue strength.
- 0.5" Diameter, 12" Length
- Normalized
- Alloy Steel 4130 is is typically used in structural applications, gears, fasteners, and aircraft exteriors.
- Meets ASTM-A29, ASTM-A108, ASTM-A322, AMS-6415, AMS-6484, AMS/MIL-S-5000
| Item Weight | 10.72 ounces (303.91 grams) |
| Item Shape | Round |
| Item Form | Bar |
| Material | Alloy Steel 4340 |
| Brand Name | Online Metals |
| Number of Items | 1 |
| Part Number | OM-7385120 |
| Manufacturer | OnlineMetals |
| Brand | Online Metals |
| Shape | Round |
Who Should Buy?
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Machinists
Ideal for machinists needing durable material for precision machining and fabrication of parts and components.
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Mechanical Engineers
Perfect for engineers who require high-strength steel for designing equipment or structural elements in mechanical systems.
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Hobbyist Projects
Great for hobbyists working on DIY projects that need strong and resilient materials for various applications.
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Lightweight Applications
Not suitable for projects where low-weight materials are required, such as light-duty structural applications.
Product Description
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Customer Questions & Answers
-
Question:
What is the composition of 4340 Alloy Steel?
Answer: 4340 Alloy Steel is primarily composed of iron, along with a mix of elements such as nickel (1.65-2.00%), chromium (0.70-0.90%), and molybdenum (0.20-0.35%). This specific composition enhances its strength and toughness, making it suitable for various applications. It possesses excellent hardenability and can withstand extreme loads, which is why it’s commonly used in automotive components, aerospace, and heavy machinery manufacturing. -
Question:
What are the main applications of 4340 Alloy Steel Round Bar?
Answer: The 4340 Alloy Steel Round Bar is widely utilized in manufacturing high-strength parts. Common applications include gears, shafts, crankshafts, and fasteners. Its ability to achieve high tensile strength while maintaining ductility makes it ideal for heavy-duty applications where reliability is critical. This alloy is also favored in tooling and machinery due to its machinability when properly treated. -
Question:
How is the 4340 alloy steel round bar processed?
Answer: The 4340 round bar is cold finished and normalized, which involves heating the steel to improve its microstructure. This processing increases the material's strength, toughness, and fatigue resistance. Once normalized, it undergoes cold working, creating a smoother finished surface and tighter tolerances, crucial for precision engineering applications where dimensional accuracy is paramount. -
Question:
Why is the unpolished (mill) finish important?
Answer: The unpolished (mill) finish allows the bar to maintain its ante-processing characteristics, retaining its structural properties. This finish is essential for applications that require the steel to be further machined or welded. Utilizing the unpolished surface can also help with achieving better mechanical bonds in subsequent applications, especially when additional coatings or surface treatments are required. -
Question:
What is AMS 6415 standard in relation to 4340 Alloy Steel?
Answer: AMS 6415 is a specification that outlines the engineering requirements for 4340 Alloy Steel used in aerospace applications. This standard ensures that the material meets stringent chemical composition and mechanical property criteria suitable for high-performance conditions. Complying with AMS 6415 certifies that the alloy has passed rigorous testing, making it reliable for critical components in the aerospace sector. -
Question:
How can I machine 4340 Alloy Steel effectively?
Answer: Machining 4340 Alloy Steel requires specific techniques due to its hardness. Using high-speed steel or carbide cutting tools, along with proper cooling methods, can achieve better results. It is recommended to employ slow speeds and high feeds to promote tool life and surface finish. Common machining methods include turning, milling, and drilling, tailored to meet desired tolerances and surface quality. -
Question:
Is 4340 Alloy Steel suitable for welding?
Answer: Yes, 4340 Alloy Steel can be welded, but it requires pre-heating and post-weld heat treatment to reduce the risk of cracking in the heat-affected zones. Understanding the welding technique and filler material selection based on the application is crucial. This steel's resilience makes it a great choice for applications where welded joints are present, particularly in high-stress environments. -
Question:
What makes normalized 4340 steel better than non-normalized?
Answer: Normalized 4340 steel shows improved uniformity in its mechanical properties when compared to non-normalized steel. This treatment enhances toughness and strength across the material while refining grain size, which is particularly beneficial in applications subjected to dynamic loads. By normalizing, the steel ensures consistency, reducing scenarios of brittle failure during operation. -
Question:
What benefits does cold finishing provide to round bars?
Answer: Cold finishing results in improved surface finish, tighter tolerances, and better mechanical properties compared to hot-rolled alternatives. This process enhances the strength and corrosion resistance of the 4340 round bar. Cold-finished steel is easier to machine, which is essential for precise applications requiring high reliability, such as in aerospace or automotive manufacturing. -
Question:
Where can I buy OnlineMetals 4340 Alloy Steel Round Bar in Zambia?
Answer: You can purchase OnlineMetals 4340 Alloy Steel Round Bar through Ubuy. They offer a wide selection of materials including this specific steel round bar, catering to customers looking for quality alloy steel for various industrial applications. Ubuy ensures that you have access to products that meet your fabrication needs, available for convenient online ordering from your location.
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Features & Benefits
- High strength and toughness for superior performance.
- Exceptional wear resistance and fatigue strength.
- Easily machined except when hardened.
- Perfect for military, automotive, and machining applications.
- Alloyed for enhanced properties compared to standard carbon steel.
- Meets rigorous ASTM and AMS specifications.
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