- Home Page /
- Industrial Supplies /
- Raw Materials /
- Metals & Alloys /
- Steel /
- Rods /
- 4340 Alloy Steel Round Bar, Unpolished (Mill)...
0 ratings
Item #:
125371402
4340 Alloy Steel Round Bar, Unpolished (Mill) Finish, Cold Finish, Normalized, AMS 6415, 0.375" Diameter, 12" Length, OnlineMetals
Item #:
125371402
MMK 138437
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Saturday, August 01
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
4340 steel offers exceptional strength, toughness, and wear resistance, making it the ideal choice for demanding applications.
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
High Strength
4340 alloy steel offers exceptional strength and durability, making it ideal for demanding applications in automotive, aerospace, and heavy machinery sectors.
Precision Sizing
With a 0.375" diameter and 12" length, this round bar allows for precision machining and fabrication, ensuring a perfect fit for various engineering projects.
AMS Certified
Conforming to AMS 6415 specifications, this steel round bar ensures reliability and quality, providing peace of mind for engineers and manufacturers seeking superior materials.
Product Details
| Item Weight | 0.5 lbs (230 grams) |
Who Should Buy?
-
Machinists
Ideal for machinists looking to manufacture precision components due to its excellent machinability and toughness.
-
Engine Builders
Perfect for engine builders requiring strong, durable steel to withstand high-stress applications in performance engines.
-
Structural Engineers
Useful for structural applications needing high-strength materials, ensuring reliability and safety in various engineering projects.
-
High Corrosion Environments
Not suitable for environments with high moisture or corrosive elements, as it lacks protective coatings.
-
Low Strength Requirements
Overkill for applications requiring low strength materials, leading to unnecessary weight and cost.
-
Recreational Crafts
Not ideal for casual crafting projects due to its industrial specifications and strength beyond typical craft needs.
Product Description
4340 Alloy Steel Round Bar, Unpolished (Mill) Finish, Cold Finish, Normalized, AMS 6415, 0.375" Diameter, 12" Length, OnlineMetals
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is the composition of OnlineMetals 4340 Alloy Steel Round Rod?
Answer: The OnlineMetals 4340 Alloy Steel Round Rod is composed primarily of iron, along with essential alloying elements such as chromium, nickel, and molybdenum. These elements enhance the steel's strength, hardness, and toughness, making it ideal for demanding applications. The specific ratios of these alloys contribute to improved wear resistance and fatigue strength. This is particularly useful in automotive and aerospace applications where high-stress durability is necessary. -
Question:
What applications are suitable for 4340 Alloy Steel?
Answer: The 4340 Alloy Steel is versatile and widely utilized in various industries. Its high strength makes it suitable for heavy-duty applications like gears, axles, and shafts in automotive manufacturing. Additionally, it's excellent for components in the aerospace sector, such as landing gear and engine mounts, where reliability and resistance to shock loading are critical. The rod's characteristics allow it to be heat treated for even greater performance in these demanding applications. -
Question:
Is the OnlineMetals 4340 Alloy Steel Round Rod easy to machine?
Answer: The OnlineMetals 4340 Alloy Steel Round Rod, while having high strength, can be machined with the right tools and techniques. It is recommended to use high-speed steel or carbide cutting tools and to apply proper cooling methods to prevent overheating. Adequate planning of your machining process, including speeds and feeds, will result in a smoother finish and reduce tool wear. This steel's machinability makes it popular for custom fabrication projects requiring precise dimensions. -
Question:
What are some finishing options for the 4340 Alloy Steel Rod?
Answer: After machining the 4340 Alloy Steel Rod, various finishing options can enhance its performance and aesthetics. Common post-processing methods include heat treatment to improve hardness, grinding for a finer surface finish, and coating applications to prevent corrosion. Depending on the end-use, you can choose to apply methods such as nitriding or phosphating to increase surface wear resistance, thus optimizing it for performance in challenging environments. -
Question:
How does the cold-finished feature affect the rod's properties?
Answer: Cold finishing improves the dimensional accuracy and surface finish of the OnlineMetals 4340 Alloy Steel Round Rod. By processing the steel at room temperature, stresses are reduced while achieving tighter tolerances and a more polished finish, enhancing its usability in precision applications. This makes the rod ideal for mechanical components that demand exact specifications and a smooth surface, contributing to better fitting and performance in assemblies. -
Question:
What is the significance of the AMS 6415 specification?
Answer: The AMS 6415 specification ensures that the OnlineMetals 4340 Alloy Steel Round Rod meets specific quality and performance standards required for high-stress aerospace applications. Adhering to this specification signifies that the material has been tested for its tensile strength, fatigue resistance, and impact properties, making it appropriate for critical components in the aerospace industry. Utilizing materials that comply with such specifications is essential for ensuring safety and reliability in aircraft manufacturing. -
Question:
What are the benefits of using an unpolished mill finish?
Answer: The unpolished mill finish on the OnlineMetals 4340 Alloy Steel Round Rod provides a raw, natural appearance while maintaining the steel's integrity. This finish is often preferred in various industrial applications where surface aesthetics are less important than functionality and strength. Additionally, the mill finish allows for easier subsequent machining and welding since there is no additional surface coating to interfere with these processes. -
Question:
How do I determine the correct size of the rod for my project?
Answer: To select the appropriate size of the OnlineMetals 4340 Alloy Steel Rod, consider the load requirements and space constraints of your project. Measure the dimensions needed for your application and think about how the rod will be used, whether for structural support, machine components, or custom parts. Consulting with engineering specifications or using design software can help ensure you choose the right diameter and length for optimal performance. -
Question:
Can the 4340 Alloy Steel Rod be welded?
Answer: Yes, the 4340 Alloy Steel Rod is weldable, although it requires proper techniques to maintain the material's beneficial properties. Preheating the rod before welding and using suitable filler materials can help reduce the risk of cracking and ensure a stronger joint. Post-weld heat treatment is often recommended to relieve stresses in high-strength applications. This makes it a viable choice for projects that require joining different components together effectively. -
Question:
Where can I buy the OnlineMetals 4340 Alloy Steel Round Rod in Myanmar?
Answer: You can conveniently purchase the OnlineMetals 4340 Alloy Steel Round Rod from Ubuy in Myanmar. Ubuy offers a variety of metal products, providing ease of access to quality materials for your projects. Their platform allows you to check availability, compare specifications, and order the right products directly online, making it a suitable choice for all your metal sourcing needs.
OnlineMetals Rods Editorial Review
No editorial reviews found
Customer Reviews & Ratings
1 customers ratings
-
5 Star
100%
-
4 Star
0%
-
3 Star
0%
-
2 Star
0%
-
1 Star
0%
Review this product
Share your thoughts with other customers
Platform Trust & Buyer Confidence
MT
Mohd
Verified buyer
“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
SJ
Shawati
Verified buyer
“Accurate delivery timing given”
16 June 2026 · via Trustpilot
YB
Youcef
Verified buyer
“Not madly expensive like I thought, and much quicker than promised.”
15 June 2026 · via Trustpilot
LM
Leila
Verified buyer
“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”
6/7/2026 · via Trustpilot
KA
Kwame
Verified buyer
“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
MMK 138437
Order now and get it around Saturday, August 01
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
Our Top Logistics Partners
Fastest cross-border delivery
Features & Benefits
- Made of high-performance 4340 alloy steel for superior toughness.
- Cold finished to achieve precise dimensions and high quality.
- Heat treatable for increased hardness and improved performance.
- Welcomes versatility with excellent machinability and weldability.
- Meets strict aerospace material specifications for reliability.
- Perfect for applications like gears, fasteners, and aircraft exteriors.
Ubuy Assurance
Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.