A513 Cold Roll Carbon Steel Round Tubing 1/2 in OD - Durable Tubing

In this review of the A513 Cold Roll Carbon Steel Round Tubing, the bottom line is simple: this tube is for fabricators, machinists, and hobbyists who need a strong, rigid tubular stock that holds shape under load. Our review highlights the tubing's primary benefit - high strength and rigidity from A513/1018 carbon steel - which makes it well suited for pins, shafts, and structural uses where durability matters more than easy weldability. Buyers should expect solid material performance and reliable straightness for mechanical parts and repairs.

Key Features

• A513 construction: Provides high strength and rigidity, giving finished parts long service life under mechanical stress.
• Cold roll drawn over mandrel: Produces consistent OD and a smooth surface that reduces finishing time for machined components.
• 1/2 in outside diameter: Fits tightly in applications needing small-diameter tubular stock for pins, axles, or sleeved shafts.
• 1/4 in wall thickness: Offers substantial cross-section strength useful for load-bearing short spans and press-fit assemblies.
• 72 in length: Long bar length allows multiple parts to be cut from a single piece, reducing joint seams and waste.
• Meets ASTM-A513: Standard compliance helps ensure material properties and dimensional acceptability for industrial projects.

Who It's For

This tubing is aimed at metalworkers building or repairing mechanical components - people making pins, rods, shafts, spindles, and sprockets will find the material and dimensions appropriate. It also suits small shops and advanced hobbyists who need straight, strong stock for fixtures or fuel tank supports where strength and straightness are priorities.

Those who should look elsewhere include users who require high weldability or easy machining without preheat; A513/1018 has somewhat reduced machinability and weldability compared with low-carbon steels. Also, if an exact larger internal bore is critical, confirm fit first since a few customers reported a slightly smaller inner diameter than expected.

Pros & Cons

Pros

• High rigidity and strength from the A513/1018 alloy makes it reliable for load-bearing parts.
• Consistent OD and smooth finish from the drawn-over-mandrel process reduce finishing work.
• Long 72 in length lets you cut multiple components from one bar, improving value for money.
• Meets ASTM-A513, giving assurance about standardized material properties.

Cons

• Machinability and weldability are slightly lower than mild steels, so fabrication may require more care.
• Some customers report the inner diameter can be marginally smaller than expected, which may affect slip-fit applications.

Specifications

Standard	ASTM-A513
Material	1018 Carbon Steel (A513)
Outside Diameter	1/2 in
Inside Diameter	1 in
Wall Thickness	1/4 in
Length	72 in

Our Verdict

The A513 Cold Roll Carbon Steel Round Tubing is a practical, cost-effective choice for makers needing strong, straight tubular stock for mechanical components. Its strength, long length, and consistent finish make it a good value for fabrications and repairs, provided the slightly lower weldability and occasional tight ID are acceptable for the project.

Frequently Asked Questions

Is this tubing easy to weld?
Answer. It can be welded, but A513/1018 has slightly lower weldability than mild steels, so proper technique and preparation are recommended.

Will the inner diameter be exact for slip fits?
Answer. Most bars are within expected dimensions, but a few customers reported a slightly smaller ID, so verify fit before final assembly.

Can this be used for shafts and pins?
Answer. Yes; the material and wall thickness are commonly used for pins, rods, shafts, spindles, and sprockets where strength and rigidity are required.