A513 Cold Roll Carbon Steel Round Tubing 2in OD 0.50in Wall - Durable

In this review of the A513 cold roll carbon steel round tubing, the bottom line is simple: it is a workhorse choice for repair and fabrication tasks that need strength and consistent wall thickness. Built to meet ASTM A513, this 2in outside diameter, 1in inside diameter tube with a 0.50in wall and 24in length is aimed at users who need rigid, predictable tubing for mechanical applications. The tubing's drawn over mandrel construction and cold rolling give it a smoother bore and higher yield strength than hot rolled alternatives, making it the go-to option for applications where durability matters.

Key Features

• ASTM A513 compliance: Provides confidence in material quality and manufacturing consistency for industrial or automotive projects.
• Drawn over mandrel: Ensures a smoother internal bore and more consistent wall thickness than non-drawn welded tubing, improving fit and flow.
• Cold rolled finish: Delivers greater yield strength and hardness compared with hot rolled tubing, which helps resist deformation under load.
• Thick 0.50in wall: Offers exceptional rigidity and strength for shafts, pins, or structural supports where high section modulus is needed.
• Dimensional sizes 2in x 1in: Matches fractional tubing needs for fittings and assemblies commonly used in HVAC and automotive lines.
• 1018 carbon steel characteristics: Makes the tube well suited to pins, rods, spindles and sprockets where machinability and strength are balanced.

Who It's For

This tubing is intended for fabricators, mechanics, and HVAC technicians who need a high-strength, consistent-dimension tube for fluid transfer lines, structural supports, or mechanical components. Its drawn and cold rolled construction suits users who prioritize a smooth bore and reliable wall thickness for assemblies and repairs.

It is less appropriate for projects that require maximum weldability or the easiest possible machining; A513 high-carbon variants trade a bit of weldability and machinability for strength. If the application requires austenitic stainless corrosion resistance or exotic alloy properties, those users should look elsewhere.

Pros & Cons

Pros

• High strength and rigidity from cold rolling and a 0.50in wall provide durable performance in load-bearing uses.
• Consistent wall thickness and a smoother bore from drawn over mandrel construction improve fit and flow in assemblies.
• Meets ASTM A513 so buyers can expect consistent manufacturing quality and traceable specification compliance.
• Good value for money given the material properties and finished condition reported by customers.

Cons

• Machinability and weldability are slightly lower than softer steels, so some fabricators may need adjusted procedures.
• Some users report the inner diameter can be marginally smaller than nominal, which may affect tight-fitting components.

Specifications

Standard	ASTM A513
Material	Cold roll carbon steel (1018 characteristics)
Outside diameter	2.00 in
Inside diameter	1.00 in
Wall thickness	0.50 in
Length	24 in

Our Verdict

The A513 cold roll carbon steel round tubing is a solid, cost-effective choice for mechanics and fabricators who need a stiff, reliably manufactured tube for automotive, HVAC, and general industrial use. Its drawn over mandrel bore and cold rolled strength make it especially suitable where consistency and durability matter, though users who prioritize weldability or corrosion resistance should consider alternative alloys.

Frequently Asked Questions

Is this tubing suitable for automotive fuel lines?
Yes, customers report successful use in fuel tank and related automotive applications, though care should be taken with fittings if the ID is near tolerance.

Can this tubing be welded easily?
It can be welded, but A513 carbon steel has slightly reduced weldability compared with lower carbon steels, so suitable welding procedures are recommended.

Will the inner diameter accept standard 1in fittings?
Most customers find the dimensions accurate, but a few have noted the inner diameter can be slightly smaller than nominal, so verify fit before final assembly.