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Tubing Tubing by Shape Square

Square Mechanical Steel Tubing

Structural steel tubing is designed to provide strength and rigidity to structures while minimizing weight. Square tubing has a square cross-section, which makes it suitable for use in applications where rectangular shapes are needed, such as the construction of frames, supports, and other structures. It is often used to create complex structures or shapes. 

  • Lock Joint Tube has created a variety of square structural & mechanical steel tubing in the following shapes:
    • Square Tubing with Sharp Corners
    • Square Tubing with Large Corners
  • We also carry steel tubing in rectangle, round, oval, non-symmetrical, & specialty shapes in over 350 different OD’s company-wide.
  • All tubes are produced to ASTM 513 if uncoated or 787 if it is coated. LJT is also able to meet customized requirements and specialty projects. 
  • LJT offers square tubing in custom-cut lengths ranging from 96” - 600”.

Partner with us to develop the perfect steel tubing for your needs. We're ready to discuss any size, shape, or material based on your unique needs.

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Several sizes of square steel tubing offered by Lock Joint Tube.

Square Steel Tubing Capabilities

Our square tubing is available in a variety of sizes, thicknesses, and materials, making it versatile and suitable for a wide range of applications.

Outside Diameter: 0.375” – 6.0”

Wall Thickness: 0.03” – 0.375”

Material Types:

 

Square Tubing Specifications

  • ASTM A513
  • ASTM A500
  • ASTM A1011
  • ASTM A1008
  • ASTM A787
  • JIS G3445
  • SAE J1392
  • SAE J2340
  • European Equivalents /EU equivalents of above

 

Specifications in Alloy:

  • 4140 Square Steel Tubing 
  • 4130 Square Steel Tubing
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Square Steel Tubing Sizes

Square Size Thickness Min. Thickness Max. Gauge Range Cut To Length Range
1/2" 0.191 0.389 16 - 22 GA 96” - 600”
5/8" 0.251 0.646 14 - 22 GA 96” - 600”
3/4" 0.291 0.964 12 - 22 GA 96” - 600”
0.790" 0.361 0.361 20 GA 96” - 600”
13/16" 0.311 1.037 12 - 22 GA 96” - 600”
27/32" 0.384 1.109 12 - 20 GA 96” - 600”
7/8" 0.407 1.183 12 - 20 GA 96” - 600”
1" 0.454 1.328 12 - 20 GA 96” - 600”
1" 0.478 1.401 12 - 20 GA 96” - 600”
1 1/8" 0.501 1.474 12 - 20 GA 96” - 600”
1 1/4" 0.571 1.848 11 - 20 GA 96” - 600”
1.260" 0.594 1.929 11 - 20 GA 96” - 600”
1 3/8" 0.641 2.089 11 - 20 GA 96” - 600”
1.49 0.697 2.085 12 - 20 GA 96” - 600”
1 1/2" 0.697 2.281 11 - 20 GA 96” - 600”
1 5/8" 1.021 2.409 11 - 18 GA 96” - 600”
1.732" 1.086 2.570 11 - 18 GA 96” - 600”
1.740" 1.135 2.689 11 - 18 GA 96” - 600”
1 3/4" 1.152 2.730 11 - 18 GA 96” - 600”
1 7/8" 1.217 2.890 11 - 18 GA 96” - 600”
2" 4.220 5.432 4 - 7 GA 96” - 600”
1.989" 1.254 2.980 11 - 18 GA 96” - 600”
1.968" 1.283 3.050 11 - 18 GA 96” - 600”
2" 1.283 4.115 8 -  18 GA 96” - 600”
2.205 2.419 2.419 14 GA 96” - 600”
2 1/4" 1.951 3.923 10 - 16 GA 96” - 600”
2.362" 2.037 3.691 11 - 16 GA 96” - 600”
2.425" 4.102 5.421 7 - 10 GA 96” - 600”
2.480" 4.102 4.102 10 GA 96” - 600”
2 1/2" 2.037 7.021 4 - 16 GA 96” - 600”
2.480" 2.728 2.728 14 GA 96” - 600”
2 1/2" 2.149 6.908 5 - 16 GA 96” - 600”
2 1/2" 2.167 4.369 10 - 16 GA 96” - 600”
2 3/4" 2.385 3.029 14 -  16 GA 96” - 600”
2.980" 6.317 8.294 5 - 8 GA 96” - 600”
3" 2.558 8.927 4 - 16 GA 96” - 600”
3.023" 2.558 8.927 4 - 16 GA 96” - 600”
3.544" 7.463 9.821 5 - 8 GA 96” - 600”
4" 4.359 11.231 5 - 14 GA 96” - 600”
4.845" 4.917 9.630 8 - 14 GA 96” - 600”
5.170" 6.858 10.282 8 - 12 GA 96” - 600”
5.250" 7.018 12.867 6 - 12 GA 96” - 600”
5.170" 7.989 8.902 10 - 11 GA 96” - 600”

 

Industries

Square structural steel tubing is commonly used in construction and manufacturing industries. Its square shape makes it ideal for building frames, supports, and other structures that require strength and stability. Some of the specific uses of square structural steel tubing include:

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