Stainless Steel Square Tube

Stainless steel square tube is widely used for architectural ornament, metalwork, machine building, furniture, sanity tools, stainless steel grades have 201, 304, 304L, 316L, 321, we offer square tube with large range of sizes and dimensions, there are small diameter and large diameter sizes square tubes.

We are manufacturer & supplier of stainless steel square tube more than 10 years of experience, production lines have strong capacity to offer welded tubes and pipes, so than they can meet a lot of applications, like ornamental and structural field, corrosion and high temperature field.

  • Type: welded tube
  • Specification: A554
  • Grades: TP201, TP304, TP304l, TP316L, TP321
  • OD: 1/2“ x 1/2″ – 12″ x 12″
  • Thickness: 0.035″ – 0.12″
  • Surface: annealed pickling, polishing, brushed
  • Application: decorative, ornamental purpose

Square tube has mill finishes and polished finishes to offer, polishing tubing finishes include 180 Grit (#4 polish), 240 Grit, 320 Grit and a #8 mirror finish. they are often used in mechanical applications where appearance, mechanical properties, or corrosion resistance is needed.

ASTM A554 304 316L Square Tube

ASTM A554 specification is for welded stainless steel tubing, beside square sharp tubing, and round tubing, rectangular tubing and special forms tubes. All tubes are produced with automatic welding process, no addition metal added.

Both as welded and annealed condition are available, square mechanical tubing should be cold worked, usually, stainless steel square tube is polished in many grit to get bright surface, brushed finishes square tubing also have.

SS square tubing dimensional tolerance list as follow, it is also rectangular tubing tolerance requirement.

Outside Diameter (in/mm)OD Tolerance (in/mm)WTH
To 1 1⁄4 (31.8), incl0.015 (0.38)±10%
Over 1 1⁄4 to 2 1⁄2 (31.8 to 63.5), incl0.020 (0.51)
Over 2 1⁄2 to 5 1⁄2 (63.5 to 139.7), incl0.030 (0.76)
Over 5 1⁄2 to 8 (139.7 to 203.2), incl0.060 (1.52)
stainless steel square tube stainless steel square tubing

stainless steel square tube sizes chart

size(mm)0.40.50.60.70.80.91.01.21.52.02.53.04.0
10X10      
12.7X12.7     
15X15     
19X19     
22X22     
25X25    
30X30     
38X38    
40X40     
50X50      
60X60       
80X80         
90X90          
100X100          
150X150