A513 Cold Roll Carbon Steel Round Tubing 2-3/4in OD - Durable, Precise

In this review of the A513 Cold Roll Carbon Steel Round Tubing, the bottom line is straightforward: this tube is for fabricators and machinists who need a rigid, close-tolerance steel tube for shafts, pins, or structural sleeves. The reviewer found the item meets ASTM-A513 expectations and delivers the main benefit-strength and dimensional consistency-making it a reliable choice for mechanical applications where rigidity matters more than easy weldability or high machinability.

Key Features

• A513 cold roll construction: provides enhanced rigidity and straightness, making it suitable for rotating components and structural supports.
• 2-3/4in outside diameter: fits common housings and fixtures that require a near 3in OD for clearance and mounting.
• 2.25in inside diameter with 0.25in wall: creates a robust wall thickness that resists bending under load and suits shafts and heavy pins.
• 24in length: is long enough for short shafts, sleeves, or to cut multiple parts while minimizing waste.
• 1018 carbon steel composition: offers good strength and wear resistance for pins, rods, spindles and sprockets used in light to moderate duty machines.
• Meets ASTM-A513: gives confidence the tubing conforms to a recognized structural tubing standard for mechanical use.

Who It's For

This tubing is ideal for hobby machinists, restoration shops, and small fabricators who need a stiff, dependable tube for mechanical components like shafts, bushings, or fuel tank fittings. Buyers replacing or repairing driveline or structural parts that require solid steel properties will appreciate the 1018 composition and the ASTM-A513 conformance.

Those who need excellent weldability, very high machinability, or lighter-weight materials should look elsewhere; A513 cold roll steel has slightly lower weldability and machinability compared with some mild steels and is not intended where corrosion resistance or minimal weight are primary requirements.

Pros & Cons

Pros

• High rigidity and strength suitable for mechanical parts that see torsion or bending.
• Accurate outside diameter and consistent wall thickness for predictable fits.
• Good value for the material type and length supplied for machining or cutting to size.
• ASTM-A513 conformity offers specification-level assurance for structural projects.

Cons

• Inner diameter can be slightly smaller than expected for some pieces, so tight-fit applications should be measured before final assembly.
• Lower machinability and weldability compared with softer mild steels, which may slow production work.

Specifications

Standard	ASTM-A513
Construction	Cold roll, drawn over mandrel
Outside diameter	2-3/4in
Inside diameter	2.25in
Wall thickness	0.25in
Length	24in
Material	1018 carbon steel

Our Verdict

The A513 Cold Roll Carbon Steel Round Tubing is a solid choice for anyone needing a stiff, specification-grade tube for mechanical components; it offers good strength, consistent OD and wall thickness, and reasonable value. Buy it if you prioritize rigidity and spec compliance; avoid it if weldability or lightweight materials are your top concerns.

Frequently Asked Questions

Is this tubing welded or seamless?
This product is cold roll drawn over mandrel and manufactured to ASTM-A513, providing a precision tube suitable for mechanical use rather than a basic welded tube.

Will the inner diameter always match 2.25in exactly?
Most pieces are accurate, but some customers report the inner diameter can be slightly smaller than expected, so measure critical bores before final assembly.

Can this steel be welded easily?
1018 A513 cold roll tubing has slightly lower weldability than softer mild steels; welding is possible but may require attention to technique and pre/post heat as appropriate.