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

Our review of this A513 cold roll carbon steel round tubing finds it best suited for machinists, fabricators, and hobbyists who need strong, consistent shaft and pin stock. The single biggest reason to buy is the tube's rigidity and material quality: drawn over mandrel 1018 carbon steel offers the strength required for pins, rods, spindles and sprockets while meeting ASTM-A513 standards. Fit and finish are generally good, customers praise the steel quality and value, and the 48 in length provides workable raw stock for multiple short runs or long parts.

Key Features

• A513 cold roll construction: Provides a consistent surface finish and tighter tolerances from the drawn over mandrel process, making it easier to machine and measure for finished parts.
• 1018 carbon steel alloy: Delivers strong mechanical properties suitable for pins, shafts and spindles that require rigidity and durability in service.
• Measured dimensions: 1/2 in outside diameter and 0.12 in wall yield a predictable cross section for fitting into assemblies and for turning operations.
• 48 in length: Long enough for multiple parts from a single piece, reducing waste and setup time for small production runs or prototyping.
• Meets ASTM-A513: Confirms the tubing follows an industry standard for cold roll drawn tubing used in structural and mechanical applications.

Who It's For

This tubing is aimed at machine shops, metalworkers, and serious DIYers who need reliable steel stock for shafts, pins, or custom spindles. The material is especially apt when part strength and straightness matter more than maximum weldability or ease of cutting.

Those who should look elsewhere include buyers needing highly weldable alloy or stainless options, or projects where an exact oversized inner diameter is critical; a few customers noted the inner diameter can be slightly smaller than expected, which matters for tight-fit slip fits or plumbing seals.

Pros & Cons

Pros

• High material strength and rigidity suitable for load-bearing pins and shafts.
• Consistent cold roll drawn finish and dimensions that simplify machining and measurement.
• Good value for the length and quality, with customers reporting solid performance in automotive and fabrication uses.

Cons

• Lower machinability and weldability compared with some lower-carbon or alloy steels, so expect slightly more tool wear or welding preparation.
• Inner diameter can be slightly smaller than nominal, which may require reaming for precision fits.

Specifications

Material standard	ASTM-A513
Material type	1018 carbon steel (cold roll)
Outside diameter	1/2 in
Inside diameter	1.26 in
Wall thickness	0.12 in
Length	48 in

Our Verdict

This A513 cold roll tubing is a practical choice for anyone needing durable, straight shaft stock and pin material. It offers strong steel quality and good value for machining and fabrication tasks, though buyers should plan for slightly reduced weldability and may need to ream the inner diameter for tight fits.

Frequently Asked Questions

Is this tubing suitable for shafts and pins?
Yes, the 1018 cold roll composition and drawn over mandrel construction make it well suited for shafts, pins and spindles that need strength and straightness.

Will it weld easily?
Weldability is slightly lower than some steels; prepare surfaces and use appropriate filler and technique for best results.

Are the dimensions accurate out of the box?
Dimensions are generally accurate and consistent, but a few buyers reported the inner diameter being slightly smaller than expected, so measure and ream if a tight tolerance is required.