A513 Cold Roll Carbon Steel Round Tubing 1.5in OD - Durable, Accurate

In this review of the A513 Cold Roll Carbon Steel Round Tubing the bottom line is simple: this tubing is built for strength and consistency, making it a solid pick for automotive, HVAC, and fluid-transfer projects where rigidity and predictable wall thickness matter. The reviewer found the tubing's cold-rolled, drawn-over-mandrel construction delivers a smoother bore and reliable dimensions, and its conformity to ASTM A513 gives confidence for mechanical and transport uses. It is best for fabricators and mechanics who need durable 1018 carbon steel tubing rather than for projects that demand the easiest machinability or welding.

Key Features

• Construction: Drawn over mandrel welding produces a smoother inner bore and more consistent wall for improved fit and flow control.
• Material Strength: Cold rolled 1018 carbon steel gives greater yield strength and hardness than hot-rolled alternatives, making it suitable for load-bearing parts.
• Dimensional Specs: The tubing provides a precise 1.5in outside diameter with a 0.12in wall that supports accurate component fits and predictable clearances.
• Standards: Meets ASTM A513, which ensures a baseline of quality for mechanical and HVAC applications.
• Length and Versatility: Supplied at 72in length, it is long enough for many runs or can be cut to size for pins, rods, shafts, and spindles.

Who It's For

This tubing is aimed at tradespeople and hobbyists who need a strong, dimensionally consistent metal tube for mechanical components, automotive fuel or air lines, HVAC runs, and structural pins or shafts. The combination of cold rolled processing and drawn-over-mandrel welding gives a balance of hardness and bore smoothness valuable to fabricators and repair shops.

Those who should look elsewhere include users requiring maximum weldability or ease of cutting and forming for very complex weld jobs, and projects that need stainless corrosion resistance or softer materials for extensive machining. The steel's machinability and weldability are slightly lower than some alternatives.

Pros & Cons

Pros

• Strong, durable material suited for load-bearing parts and mechanical components.
• Consistent wall thickness and smoother inner bore thanks to drawn-over-mandrel construction.
• Meets ASTM A513 for quality assurance and predictable performance in HVAC and automotive lines.

Cons

• Machinability and weldability are slightly reduced compared with lower-carbon steels, which may slow some fabrication tasks.
• Some users note the inner diameter can be marginally smaller than expected, requiring test fitting for tight-tolerance projects.

Specifications

Material	1018 cold rolled carbon steel
Standard	Meets ASTM A513
Outside Diameter	1.5in
Inside Diameter	1.26in
Wall Thickness	0.12in
Length	72in

Our Verdict

The A513 Cold Roll Carbon Steel Round Tubing is a practical, value-minded choice for anyone needing sturdy, dimensionally consistent tubing for automotive, HVAC, or mechanical uses. Its ASTM A513 compliance and drawn-over-mandrel finish make it particularly useful where a smooth bore and reliable wall thickness matter, though fabricators who prioritize ease of welding or corrosion resistance should evaluate alternatives.

Frequently Asked Questions

Is this tubing suitable for automotive fuel lines?
Yes, the tubing is used in automotive applications including air conditioning and fuel tank work, though fittings and sealing methods should match the material properties.

Can it be welded and machined easily?
It can be welded and machined, but the 1018 cold rolled composition has slightly lower weldability and machinability than some softer steels, so expect modest adjustments in technique.

Are the dimensions reliable for tight-tolerance parts?
Dimensions are generally accurate and consistent, but some users report a slightly smaller inner diameter; test fitting is recommended for very tight tolerances.