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Item #:
99843812
4140 Alloy Steel Round Bar, Unpolished (Mill) Finish, Annealed, Cold Finish, ASTM A108, 0.75" Diameter, 36" Length, OnlineMetals
87% of respondents would recommend this to a friend
Item #:
99843812
€ 279
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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
The 4140 alloy steel offers exceptional strength and toughness, ideal for demanding applications such as automotive and machinery, outperforming standard steel in durability and reliability.
Precision Dimensions
With a diameter of 0.875 inches and a length of 12 inches, this round bar ensures precise dimensional control, making it perfect for custom fabrication and machine tooling.
Versatile Use
This annealed, cold-finished bar is suitable for various industries, allowing for easy machining and welding, providing flexibility for engineers and manufacturers to innovate freely.
Product Details
| Item Diameter | 0.75 Inches (1.9 cm) |
| Item Thickness | 0.75 Inches (1.9 cm) |
| Item Weight | 0.01 Ounces (0.28 grams) |
| Color | Silver |
| 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 | 120602 |
| Part Number | 15488 |
| Unit Count | 3.0 Feet |
| Manufacturer | OnlineMetals |
| Brand | Online Metals |
| Shape | Round |
Who Should Buy?
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Machinists
Ideal for machinists needing strong, durable materials for precision machining applications in various industries.
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Fabricators
Excellent for fabricators looking for high-strength steel bars for welding and fabrication projects.
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Engineers
Suitable for engineers designing components requiring high wear resistance and toughness in their applications.
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Hobbyists
May not be suitable for casual hobbyists who require lighter materials for simple crafts or projects.
Product Description
4140 Alloy Steel Round Bar, Unpolished (Mill) Finish, Annealed, Cold Finish, ASTM A108, 0.75" Diameter, 36" Length, OnlineMetals
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Customer Questions & Answers
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Question:
What are the benefits of using 4140 steel?
Answer: 4140 steel offers high strength, excellent machinability, and resistance to fracturing and abrasion, making it ideal for heavy-duty applications. -
Question:
Can the 4140 steel rod be customized?
Answer: Yes, its excellent machinability allows for simple cutting, shaping, and finishing based on your project requirements. -
Question:
Is 4140 steel resistant to wear?
Answer: Absolutely, 4140 steel is known for its wear resistance, making it suitable for high-stress applications.
Online Metals Rods 120602 Editorial Review
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Last Updated on July 19, 2026
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€ 279
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Features & Benefits
- Made from 4140 alloy steel, offering high strength and durability.
- Cold finished and annealed for enhanced formability and toughness.
- Meets ASTM A108 specifications, ensuring quality performance.
- Excellent machinability allows for easy customization and shaping.
- Versatile applications in gears, shafts, and heavy-duty parts.
- Can be heat treated for increased hardness and impact resistance.
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