1.375 in OD A513 Cold Roll Carbon Steel Round Tubing - 12 in

In this review of the 1.375 in OD A513 Cold Roll Carbon Steel Round Tubing, the bottom line is straightforward: this tube is for builders, fabricators, and hobby machinists who need a short length of rigid, high-strength steel for pins, shafts, or structural fittings. The reviewer found the single biggest reason to buy is its combination of heavy wall thickness and compliance with ASTM A513, which delivers predictable strength and form for small-run projects or repairs where a ready-made steel tube avoids time-consuming machining from bar stock.

Key Features

• Material and grade: High-carbon A513/1018 steel provides strong, rigid performance for load-bearing short runs and mechanical parts.
• Precise outer size: The 1.375 in outside diameter fits common fixtures and bearings without extensive modification in many retrofit tasks.
• Substantial wall: The 0.375 in wall thickness gives excellent resistance to bending and wear when used as a shaft sleeve or spacer.
• Useful inner bore: The 0.625 in inside diameter can accept medium-size pins and rods, though careful measurement is advised for tight tolerances.
• Ready length: Supplied in a 12 in length for easy handling and multiple short cuts without excess waste.
• Standards compliance: Meets ASTM-A513 so buyers get consistent material properties for mechanical applications.

Who It's For

This tubing is aimed at metalworkers who need a short, heavy-wall round tube for repairs, prototyping, or machine parts. It suits makers building pins, shafts, spindles, or sprocket hubs who want a ready-made tube with predictable strength and minimal setup time.

Those who need superb weldability or very high machinability for intricate internal features should look elsewhere, since A513/1018 has slightly lower machinability and weldability compared with some alloyed steels. Also, buyers needing exact inner-diameter fits for precision bearings should allow for minor variation in the bore and consider reboring if tolerance is critical.

Pros & Cons

Pros

• High strength and rigidity from A513/1018 steel make the tube suitable for load-bearing mechanical parts.
• Substantial 0.375 in wall thickness provides durability and resistance to deformation.
• 12 in ready length is convenient for multiple uses and reduces cutting waste.
• Customers report good overall steel quality and value for money in practical applications.

Cons

• Inner diameter can measure slightly smaller than nominal, so reboring or careful measuring may be needed for tight fits.
• Slightly lower machinability and weldability than some steels, which can slow advanced fabrication tasks.

Specifications

Material	A513 / 1018 carbon steel
Outside diameter	1.375 in
Inside diameter	0.625 in
Wall thickness	0.375 in
Length	12 in
Standard	Meets ASTM-A513

Our Verdict

The 1.375 in OD A513 cold roll tubing is a practical, value-minded choice for fabricators and hobbyists who need a short, heavy-wall steel tube that behaves predictably under load. It is best when used as pins, shafts, or structural sleeves where strength and durability matter, though buyers with exact bore tolerances or demanding welding needs should plan for finish machining or select a more weldable grade.

Frequently Asked Questions

Is this tubing ready to use as a shaft sleeve?
Yes, its 0.375 in wall offers strong support for shaft sleeve applications, but check bore size and ream if a precise inner diameter is required.

Can this be welded easily?
It can be welded, but A513/1018 has slightly lower weldability than some steels, so standard precautions and appropriate filler materials are recommended.

Is the listed size accurate?
Customers generally report accurate outer dimensions and good quality, though a few note the inner diameter can be slightly undersized.