A513 Cold Roll Carbon Steel Round Tubing 7/8in OD - Durable Drawn Tube

Our review of the A513 Cold Roll Carbon Steel Round Tubing finds it best suited for metalworkers, fabricators, and automotive hobbyists who need a short, strong length of tubular stock. The single biggest reason to buy is its combination of cold rolled strength and a drawn-over-mandrel bore, which gives a smoother interior and more consistent wall thickness than non-drawn welded tubing. Reviewers will appreciate the suitability for applications such as HVAC lines, automotive fittings, and shafts where rigidity and predictable dimensions matter.

Key Features

• Material: A513 cold rolled carbon steel delivers increased yield strength and hardness for durable structural use.
• Drawn Over Mandrel: The drawn-over-mandrel process provides a smoother bore and more consistent wall thickness for better fit and flow.
• Dimensions: The 7/8in outside diameter with a 0.563in inside diameter and 0.156in wall offers a robust cross section for pins, shafts, and structural components.
• Length: The 24in cut is convenient for short runs, prototypes, or multiple smaller parts without excessive waste.
• ASTM A513 Compliance: Meeting ASTM-A513 assures buyers of consistent manufacturing standards for mechanical and dimensional properties.
• Typical Uses: 1018 carbon steel chemistry makes this tubing suitable for pins, rods, spindles, and sprocket-related applications where strength is valued.

Who It's For

This tubing is aimed at professionals and experienced DIYers repairing automotive air conditioning lines, creating structural components, or fabricating custom shafts and pins. Its cold rolled, drawn construction is particularly useful when a smoother internal surface and uniform wall thickness are required for assembly or fluid transfer.

Those who need extremely tight inner diameter tolerances or exceptional weldability may want to evaluate alternative alloys or processes, because A513 and 1018 carbon steel trade slightly reduced machinability and weldability for greater strength and hardness.

Pros & Cons

Pros

• Good material strength and rigidity suitable for load-bearing uses.
• Smoother bore and consistent wall thickness from the drawn-over-mandrel process improves fit and flow.
• Meets ASTM-A513 for repeatable quality and dimensions.
• Well regarded by customers for steel quality and value for money.

Cons

• Inner diameter can be slightly smaller than expected in some pieces, which may affect tight-fit applications.
• A513/1018 has somewhat lower machinability and weldability compared with softer steel grades.

Specifications

Standard	ASTM A513
Material	Cold rolled carbon steel (1018 chemistry)
Outside Diameter	7/8in
Inside Diameter	0.563in
Wall Thickness	0.156in
Length	24in

Our Verdict

The A513 Cold Roll Carbon Steel Round Tubing is a practical choice for fabricators and automotive hobbyists who need strong, consistent tubular stock with a smooth bore. It offers solid value and reliable mechanical properties for pins, shafts, HVAC lines, and short structural runs; buyers who require ultra-precise inner diameters or maximum weldability should consider other alloys or custom tolerances.

Frequently Asked Questions

Is this tubing suitable for automotive fuel or AC lines?
Yes, the tubing is commonly used in automotive and HVAC applications and is suitable for AC lines; verify inner diameter fit for specific fittings.

Can this tubing be welded and machined easily?
It can be welded and machined, but A513/1018 has slightly lower weldability and machinability than softer steels, so adjust techniques accordingly.

Does the product meet any industry standards?
Yes, the tubing meets ASTM-A513 specifications for dimensional and manufacturing quality.