In response to the COVID-19 pandemic, Totten Tubes is considered an essential business and will remain open to serve the needs of our valuable customers. Totten Tubes is taking the necessary measures to ensure the safety of our employees while serving our customers. Thank you for your business and support during these uncertain times. Please take care, stay well and know Totten Tubes is committed to the vital industries and customers we serve. Please give us a call at 800-882-3748 if you have any additional questions.

Carbon Steel Square Tubing

Totten Tubes is committed to supplying the right carbon steel tubing for any application in any industry. With that in mind, we maintain one of the industry’s largest in-stock inventories of square steel tubing, with structural steel square tubing and mechanical steel square tubing available in a wide range of sizes, from 3/8” x 3/8” to 20” x 20”. And, if we don’t have the square steel tubing you need on hand, we’ll find it for you and ship it out right away.

Structural Steel Square Tubing

Structural steel square tubing is used to provide support for all sorts of buildings and rigid structures. Structural-grade square steel tubing can be found in countless applications, from small, simple signposts or handrails to massive, multipart supports for bridges or stadiums. Totten Tubes stocks a huge inventory of sizes and grades to help you find the right structural steel square tubing for your specific needs. 
Follow the links below to view our inventory of structural carbon steel tubing, or use the filters at left to narrow your search results. Then, request a quote or contact Totten Tubes for the structural steel square tubing your project requires.

Structural Steel Square Tubing Options

  •  A500B FR
  • A500B HSS
  • A500C HSS
  • A1085 HSS
Totten Tubes stocks a wide variety of smaller ornamental sizes in A500 Grade B. These are often used in the Transportation, Ladder and Lift Industries, as well as for handrails in the Construction Industry. Give us a call today at 800-882-3748 with your project requirements.


Mechanical Steel Square Tubing

From cars and trucks to construction equipment and heavy machinery, carbon steel tubing is a key component in all sorts of dynamic applications. The bigger the machine, the more mechanical steel square tubing you’re likely to find. With our extensive, comprehensive inventory of carbon square tubing, we’re sure to have the right option for your mechanical application—whatever it may be.
Follow the links below to view our inventory of mechanical steel square tubing, or use the filters at left to pinpoint your search. Then, request a quote or contact Totten Tubes for the mechanical-grade carbon steel square tubing you need.

Mechanical Steel Square Tubing Options

  • A513-1 BLACKKOTE
  • A513-1 CREW
  • A513-1 HREW
  • A513-1 HREW/CREW
All A513 Type 1 mechanical steel square tubing is produced from 1008-1015 steel.

The Right Square Steel Tubing for Your Needs

Most companies offer carbon square tubing in a limited range of “standard” sizes. To meet every customers’ specific needs, Totten Tubes maintains a large, in-stock inventory of sizes that other suppliers can’t provide, including hard-to-find sizes. With our selection of sizes and grades, we’re sure to have the right square steel tubing for your application.

Value Added Services for Carbon Steel Square Tubing

To provide carbon steel tubing that better matches our customers’ unique specifications, we offer numerous value-added secondary tubing services. We can provide:

Contact Us for Square Steel Tubing & More

Totten Tubes stocks North America’s most diverse inventory of structural steel square tubing and mechanical steel square tubing. Request a quote for square steel tubing or contact us to learn more.

We also offer stainless steel square tubinggalvanized square tubing, carbon and stainless rectangular tubinground tubing, and more.