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

In this review the A513 cold rolled carbon steel round tubing is evaluated for workshop and HVAC use, and the bottom line is that it is a practical, heavy-duty option when strength and consistent wall thickness matter. Our review finds it best for fabricators, mechanics, and HVAC technicians who need a weldable, drawn-over-mandrel tube with a smooth bore and reliable dimensional stability. The tubing's cold rolled 1018-style carbon steel construction gives greater yield strength and hardness than hot rolled equivalents, making it a solid choice where rigidity and wear resistance are priorities.

Key Features

• Material: Cold roll carbon steel provides increased yield strength and hardness compared with hot rolled steel, so components hold up under load.
• Manufacturing: Drawn over mandrel welding produces a smoother bore and more consistent wall thickness, benefiting fluid flow and precision fits.
• Dimensions: The 1-1/2in outside diameter with a 1in inside diameter and 1/4in wall gives a sturdy profile suitable for pins, shafts, and structural uses.
• Standards: Meets ASTM A513 specification, offering buyers assurance of consistent quality and material properties for industrial applications.
• Length: The 36in length is convenient for cutting to size in shop and field projects without excessive waste for many common repairs and builds.
• Typical uses: 1018-style carbon steel composition is appropriate for mechanical parts like rods and sprockets where hardness and strength are needed.

Who It's For

This tubing suits fabricators, automotive restorers, HVAC technicians, and hobby machinists who need a strong, drawn welded tube that machines and fits reliably into assemblies. It is especially useful for projects that require consistent wall thickness and a smoother internal bore than undrawn welded tubing.

Those who need excellent weldability for thin-gauge, high-alloy applications or who require stainless corrosion resistance should look elsewhere, as this is a cold rolled carbon steel product with slightly reduced weldability compared with lower carbon steels or stainless options.

Pros & Cons

Pros

• Strong, rigid 1018-style carbon steel that resists bending under load and suits pins, shafts, and spindles.
• Drawn over mandrel process yields a smoother bore and consistent wall for better fluid flow and dimensional accuracy.
• Cold rolled finish increases yield strength and hardness versus hot rolled tubing for durable parts.
• Meets ASTM A513, giving confidence in material consistency for industrial use.

Cons

• Higher carbon content means slightly lower machinability and weldability compared with some other tubing grades.
• Some users report the inner diameter can be marginally smaller than expected, which may affect tight-fit applications.

Specifications

Product Standard	ASTM A513
Outside Diameter	1-1/2in
Inside Diameter	1in
Wall Thickness	1/4in
Length	36in
Material Type	Cold roll carbon steel (1018-style)

Our Verdict

The A513 cold roll carbon steel round tubing is a practical, value-oriented choice for mechanics, fabricators, and HVAC professionals who need a rigid, consistent tube for structural and fluid-transfer applications. It is worth buying when strength, a smoother bore, and ASTM A513 compliance matter, but those needing maximum weldability or corrosion resistance should consider alternate alloys.

Frequently Asked Questions

Is this tubing suitable for automotive fuel lines?
Yes, customers report it works well in some automotive fuel and HVAC lines, though confirm dimensional fit and compatibility with fuel system fittings before installation.

Can this tube be welded and machined easily?
It can be welded and machined, but the higher carbon content means slightly lower weldability and machinability compared with lower carbon or stainless grades.

Does the tube meet industrial standards?
Yes, the tubing meets ASTM A513, providing assurance of consistent manufacturing and material properties.