1-3/4 in OD A513 Cold Roll Carbon Steel Round Tubing - 48 in

Our review of the 1-3/4 in OD A513 cold roll carbon steel round tubing finds it best suited for fabricators and hobbyists who need a straight, strong steel tube for shafts, pins, or custom repair work. The single biggest reason to consider this tube is its combination of rigidity and standardized manufacturing to ASTM A513, which gives predictable mechanical behavior for projects that demand strength more than ease of machining. The review highlights fit, steel quality, and length accuracy as consistent strengths while noting the inner bore can be slightly undersize on occasion.

Key Features

• ASTM A513 construction: Provides a manufacturing standard that ensures consistent mechanical properties and suitability for structural or rotating parts.
• 1-3/4 in outside diameter: A common OD that fits many couplings and brackets without excessive modification.
• 1.56 in inside diameter: Offers a predictable inner bore for shafts and adapters where close tolerances are beneficial.
• 0.095 in wall thickness: Balances strength and weight so the tube resists bending while remaining workable for many fixtures.
• 48 in length: A full 4 ft length that reduces the need to join pieces for medium-length projects and simplifies cuts.
• 1018 carbon steel material: Gives the tube good strength and wear resistance for pins, rods, and sprocket shafts commonly found in mechanical work.

Who It's For

This tubing is aimed at machinists, metalworkers, and repair technicians who need a reliable steel tube that meets ASTM A513 and performs well under load. It is a practical choice for building shafts, spindles, pins, and fixtures where rigidity and standard dimensions matter more than easy welding or maximum machinability.

Those who should look elsewhere include fabricators who require superior weldability or users who need exceptionally tight internal bores every time; the tubing's inner diameter is reported by some buyers to be slightly smaller than nominal, so precision-bore applications may need additional finishing.

Pros & Cons

Pros

• Good material strength and stiffness from 1018 carbon steel, suitable for load-bearing parts.
• Consistent outer dimensions make it easy to fit into standard mounts and couplers.
• Full 48 in length saves time and joints for medium-length assemblies.
• Meets ASTM A513 standard, giving confidence in manufacturing consistency.

Cons

• Inner diameter can be slightly under nominal on some pieces, which may require reaming for tight tolerance fits.
• Lower machinability and weldability compared with low-carbon steels, so expect more effort when fabricating.

Specifications

Material	1018 carbon steel (A513)
Standard	Meets ASTM A513
Outside Diameter	1.75 in
Inside Diameter	1.56 in
Wall Thickness	0.095 in
Length	48 in

Our Verdict

The 1-3/4 in OD A513 cold roll tubing is a solid choice for anyone building shafts, pins, or structural assemblies where strength and standardized dimensions matter. It represents good value when steel quality and predictable performance are priorities, though projects requiring immaculate internal bores or easy welding should plan for additional finishing.

Frequently Asked Questions

Is this tubing welded or seamless?
The listing references A513 cold roll tubing, which is a drawn over mandrel product made to that specification rather than being described as seamless.

Will the inner diameter fit a 1.5 in shaft?
The nominal 1.56 in ID should clear a 1.5 in shaft, but some customers report the bore can be slightly smaller, so verify and ream if a very tight fit is required.

Can this be welded easily?
This is 1018 carbon steel with slightly lower weldability than lower carbon grades, so use appropriate welding procedures and pre/post-heat if welding is critical.