A513 Cold Roll Carbon Steel Round Tubing 1-1/4 in OD - Strong, Precise

In this review the focus is on practicality: the A513 cold roll carbon steel round tubing is a straightforward choice for metalworkers and fabricators who need rigid, reliably sized tube stock for shafts, pins, or repair projects. The single biggest reason to buy is its strength and dimensional consistency as drawn over mandrel tube that meets ASTM-A513, which makes it useful where stiffness and fit matter more than ease of welding. The review is based on the product description and customer feedback about fit and material performance.

Key Features

• A513 steel construction: Provides high strength and rigidity for load-bearing applications where deflection must be minimized.
• Drawn over mandrel finish: Gives improved surface quality and consistent wall thickness for better fits and smoother machining.
• 1-1/4 in outside diameter: A common nominal size that fits many standard fixtures and fittings without custom adapters.
• 0.75 in inside diameter and 0.25 in wall: A thick wall profile that suits shafts, spindles, and components requiring torsional strength.
• 48 in length: Long enough for multiple cuts or longer projects, reducing the need to join sections in many applications.
• Meets ASTM-A513: Offers buyers a recognized standard for mechanical and dimensional expectations.

Who It's For

This tubing is best for machinists, hobbyists, and small fabrication shops that need sturdy tube stock for pins, rods, shafts, spindles, sprockets, or structural elements where steel quality and rigidity are priorities. It fits projects where a tight outer diameter and thick wall will resist bending and hold bearings or press-fit components reliably.

Those who require excellent weldability or the easiest machinability might look elsewhere or plan for preheating and specific welding procedure adjustments, since A513 and 1018-like carbon steel have only modest weldability and slightly lower machinability compared with softer alloys.

Pros & Cons

Pros

• Good material strength and rigidity, suitable for load-bearing applications.
• Drawn over mandrel finish yields accurate outer dimensions and smooth surface for bearings and sleeves.
• Thick 0.25 in wall supports shafts and spindles with reduced deflection.
• Long 48 in length allows multiple uses from a single piece.

Cons

• Lower machinability and weldability compared with low-carbon steels, which can require more effort or special procedures.
• Some customers report the inner diameter can be slightly smaller than expected, which may affect tight-fit assemblies.

Specifications

Standard	ASTM-A513
Material	A513 cold roll carbon steel (1018-like)
Outside Diameter	1-1/4 in
Inside Diameter	0.75 in
Wall Thickness	0.25 in
Length	48 in

Our Verdict

The A513 cold roll round tubing is a pragmatic, value-oriented option for anyone needing stiff, consistent tube stock for shafts, pins, or structural uses. Its drawn over mandrel finish and thick wall make it a dependable raw material when strength and dimensional stability matter, though buyers should account for slightly reduced machinability and check internal fit tolerances before final assembly.

Frequently Asked Questions

Is this tubing welded or seamless?
This is drawn over mandrel cold roll tubing manufactured to ASTM-A513, providing a consistent finished tube intended for structural and machining uses.

Will it be easy to weld?
Weldability is moderate; A513/1018-like carbon steel can be welded but may require appropriate preheat and technique compared with lower-carbon steels.

Are the dimensions accurate for press-fit bearings?
Outer diameter is consistent due to the mandrel draw, but customers have noted the inner diameter can be slightly smaller, so verify fit before committing to press-fit assemblies.