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Item #:
172255540
4140 Alloy Steel Round Bar, Unpolished (Mill) Finish, Annealed, Cold Finish, ASTM A108, 2" Diameter, 48" Length, OnlineMetals
Item #:
172255540
AUD 752
Price Details
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Imported from USA store
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Order now and get it around Friday, August 21
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4140 steel, also called 'Chromoly Steel', is known for strength, resistance to fracturing, abrasion, and impact in high stress applications.
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What Stands Out
High-Strength Material
Made from 4140 alloy steel, this round bar offers exceptional strength and durability, making it ideal for heavy-duty applications and ensuring long-lasting performance in demanding environments.
Precision Cold Finish
The cold finish provides a smooth, consistent surface that enhances precision machining capabilities, making it suitable for intricate parts and reducing the need for additional finishing processes.
Versatile Use
Available in a convenient 2.25-inch diameter and 12-inch length, this product is perfect for various applications, including automotive, tooling, and construction, catering to both hobbyists and professionals alike.
Product Details
| Item Thickness | 2 Inches (5.1 cm) |
| Item Weight | 42.68 Pounds (19.36 kg) |
| Item Shape | Round |
| Item Form | Rod |
| Material | Alloy Steel 4140/4142 |
| Grade Rating | 4140 |
| Specification Met | Astm A108 |
| Brand Name | Online Metals |
| Number of Items | 1 |
| Model Number | 120558 |
| Part Number | 10587 |
| Unit Count | 4.0 Feet |
| Manufacturer | OnlineMetals |
| Brand | Online Metals |
| Shape | Round |
Who Should Buy?
-
Machining Professionals
Ideal for machinists who need a durable material for custom parts and precision components.
-
Manufacturing Industry
Suitable for manufacturers looking for strong, versatile materials for production and fabrication processes.
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Custom Metal Projects
Perfect for hobbyists and engineers working on structural or mechanical design projects requiring strong steel.
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DIY Homeowners
Homeowners looking for easy-to-use materials for light repairs or projects may find this too heavy-duty.
Product Description
4140 Alloy Steel Round Bar, Unpolished (Mill) Finish, Annealed, Cold Finish, ASTM A108, 2" Diameter, 48" Length, OnlineMetals
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Customer Questions & Answers
-
Question:
What is Chromoly Steel?
Answer: Chromoly Steel is a type of alloy steel known for its high strength and resistance to fracturing. -
Question:
What are the common uses for 4140 steel?
Answer: 4140 steel is commonly used for gears, shafts, fixtures, bolts, and other high-stress components. -
Question:
Does this product meet any safety standards?
Answer: Yes, it meets ASTM-A108 standards, ensuring its reliability in industrial applications.
Online Metals Rods 120558 Editorial Review
**** The OnlineMetals 4140 Alloy Steel Round Bar has garnered positive feedback from various customers for its overall quality and versatility in different projects. Users appreciate the excellent quality of the metal, often comparing it to materials they’ve encountered in professional settings such as tool and die shops. Customers have employed this steel bar to create a range of tools and applications, from leveling feet for machines to bird feeder supports. The product meets expectations in terms of finish and dimensions, with several reviewers noting that the rod dimensions are accurate enough for their needs, and the surface finish aligns well with the product images on Amazon. It also machines well, which customers have found advantageous for their DIY projects. However, minor issues have been reported, including slight bends that can affect the bar's performance, particularly when used on a lathe. Despite this, the general sentiment remains favorable, with users expressing satisfaction with both the performance of the steel and the company's responsiveness to any issues that arise. **
Customer Reviews & Ratings
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Pros
- High-quality material comparable to professional-grade metal.
- Versatile for various DIY projects and tool-making.
- Accurate dimensions; good machining properties.
- Positive user experiences with product functionality.
Cons
- Occasional minor defects such as slight bends.
Platform Trust & Buyer Confidence
CJ
Chris
Verified buyer
“Promt delivery. Seems like a good product.”
22 July 2026 · via Trustpilot
SM
Scott
Verified buyer
“It was the best service ever received by any company from my online shopping experience in the last 10yrs”
11 July 2026 · via Trustpilot
TD
Terri
Verified buyer
“so easy to order delivery was way earlier than i expected”
3 July 2026 · via Trustpilot
GC
Gavin
Verified buyer
“Very impressed with the speed at which I received my package from the United States to Australia. Highly recommended.”
21-Jul-26 · via Trustpilot
J
Jeannie
Verified buyer
“Very efficient service. Hassle-free. Excellent product. Have ordered several times.”
17-Jul-26 · via Trustpilot
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Top selling 4140 Alloy Steel in Australia
Last Updated on August 4, 2026
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AUD 752
Order now and get it around Friday, August 21
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Features & Benefits
- Made from high-quality 4140 Chromoly Steel.
- Designed for superior strength and durability.
- Resistant to fracturing, abrasion, and impact.
- Ideal for high-stress applications like gears and shafts.
- Meets ASTM-A108 standards for reliability.
- Perfect for heavy-duty use in various industries.
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