1/2 in OD A513 Cold Roll Carbon Steel Round Tubing - 72 in Length

Our review of the 1/2 in OD A513 Cold Roll Carbon Steel Round Tubing summarizes who will benefit most and why this piece of drawn-over-mandrel tubing is worth considering. For fabricators and hobbyists needing a durable, straight shaft material, the single biggest reason to buy is its combination of high strength and consistent dimensions in a ready-to-use 72 in length. The review focuses on real-world fit, material behavior, and dimensional accuracy so readers can decide if this 1018 carbon steel tube suits projects such as pins, shafts, or fuel tank fittings.

Key Features

• Material: A513 grade 1018 carbon steel offers reliable strength and rigidity for mechanical components that demand durability.
• Precise OD: The 1/2 in outside diameter provides a common, easy-to-fit size for collars, bushings, and connectors.
• Inner diameter and wall: A 0.37 in inner diameter with a 0.065 in wall gives a solid balance between stiffness and weight for shafts and spindles.
• Length: The full 72 in length arrives ready for long runs or cut-to-length jobs without the need to join sections.
• Manufacturing: Drawn over mandrel cold rolling produces a straight, smooth surface that helps with consistent fits and bearings.
• Standards: Meeting ASTM-A513 ensures the tube conforms to recognized mechanical and dimensional expectations for metal tubing.

Who It's For

This tubing is best for machinists, metal fabricators, and hobbyists looking for a stiff, high-strength 1018 carbon steel round tube suitable for pins, rods, shafts, spindles, and sprockets. Its 1/2 in OD and 72 in length make it practical for repair work, custom shafting, and structural supports where a continuous length is valuable.

Those who need superior weldability or the highest machinability should consider alternate alloys, as customers note A513 steel sacrifices a bit of ease in welding and cutting in exchange for rigidity. If inner diameter tolerances must be exact for press fits, verify fit first because some users reported a slightly smaller ID than expected.

Pros & Cons

Pros

• High material strength makes it suitable for load-bearing shafts and mechanical parts.
• Consistent 72 in length and cold-rolled finish reduce straightening and prep work.
• Good value for the quality, with customers praising steel quality and functionality.

Cons

• Weldability and machinability are slightly reduced compared with lower-carbon steels, so fabrication may require more effort.
• Inner diameter can be marginally smaller than nominal, which may affect tight press-fit applications.

Specifications

Our Verdict

The 1/2 in OD A513 cold roll round tubing is a practical, cost-effective choice for anyone needing strong, straight 1018 carbon steel in a ready 72 in length. It is especially well suited to shafting, pins, and spindles where rigidity and consistent OD matter; just be mindful of modestly reduced machinability and the occasional slightly tight inner diameter when planning press-fit assemblies.

Frequently Asked Questions

Is this tubing good for shafts and spindles?
Yes, the 1018 A513 material and 0.065 in wall provide the strength and stiffness typically required for shafts and spindles.

Will it weld easily?
It can be welded, but customers report slightly lower weldability than lower-carbon steels, so use appropriate filler and preheat as needed.

Are dimensions accurate out of the box?
The OD and wall are generally accurate, but some buyers have found the inner diameter slightly smaller than expected, so check fit before final assembly.