Stainless Steel Square & Rectangular Tube

Square Tube has a cross-section with equal width and height, while Rectangular Tube has a cross-section with differing widths and heights. 

Stirlings stocks a range of Square and Rectangular Tube in Austenitic Grades 304 and 316 manufactured to ASTM A554. 

  • Square Tube is available in Wall Thicknesses 1.2mm, 1.5mm, 1.6mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm and 6.0mm in sizes from 12.70mm x 12.70mm to 200.0mm x 200.0mm.

  • In addition, Rectangular Bar in sizes from 40.0mm x 12.0mm x 1.6mm to 200.0mm x 100.0mm x 5.0mm.

  • Also, Rectangular Flat Bar in sizes from 50.0mm x 10.0mm x 1.5mm to 40.0mm x 10.0mm x 1.6mm.

Everything currently in stock is specified in the tables below.   

Square and Rectangular Tube is available in the following finishes: 

  • Unpolished (mill finish) 

  • 180# grit polish 

  • 320# grit polish 

  • 400# grit polish 

  • Mirror finish 

● Stocked Item ○ Market Available

Anything not currently in stock/Market Available can be obtained via indent. 

Square Tube
Square Sections 304 304 Weight
Wall Size #180 Grit Mirror kg/ mtr
     TS304 TS304+MP   
1.2 12.7 x 12.7 ● ○ 0.441
  15.88 x 15.88 ○ ○ 0.631
  19.05 x 19.05 ● ○ 0.673
  22.22 x 22.22 ● ○ 0.883
  25.4 x 25.4 ● ○ 0.824
  31.8 x 31.8 ● ○ 1.085
  38.1 x 38.1 ● ○ 1.440
  50.8 x 50.8 ● ○ 1.900
1.5 12.0 x 12.0 ○ ○ 0.55
  12.7 x 12.7 ○ ○ 0.55
  15.0 x 15.0 ○ ○ 0.90
  19.0 x 19.0 ○ ○ 1.17
  25.4 x 25.4 ○ ○ 1.552
  31.8 x 31.8 ○ ○ 1.849
  38.1 x 38.1 ○ ○ 1.875
  50.8 x 50.8 ○ ○ 2.489
1.6 12.7 x 12.7 ● ○ 0.670
  19.05 x 19.05 ● ○ 1.174
  22.22 x 22.22 ○ ○ 1.396
  25.4 x 25.4 ● ○ 1.552
  31.8 x 31.8 ● ○ 1.849
  38.1 x 38.1 ● ● 1.875
  50.8 x 50.8 ● ○ 2.489
  60.0 x 60.0 ● ○ 3.058
  80.0 x 80.0 ● ○ 4.078
2.0 25.4 x 25.4 ● ○ 1.470
  31.8 x 31.8 ● ○ 1.890
  38.1 x 38.1 ● ○ 2.350
  50.8 x 50.8 ● ○ 3.400
3.0 25.4 x 25.4 ● ○  2.100
  38.1 x 38.1 ● ○ 3.300
  40.0 x 40.0 ● ○ 3.400
  50.8 x 50.8 ● ○ 4.480
  60.0 60.0 ● ○ 5.491
  80.0 x 80.0 ● ○ 7.300
  100.0 x 100.0 ● ○ 9.600
  150.0 x 150.0 ● ○ 13.760
4.0 50.0 x 50.0 ● ○ 6.000
5.0 50.0 x 50.0 ● ● 5.556
  80.0 x 80.0 ● ● 11.700
  100.0 x 100.0 ● ○ 14.820
  150.0 x 150.0 ● ○ 22.620
6.0 200.0 x 200.0 ● ○ 36.320

 

Square Tube
Square Sections 316 316 316 316 Weight
Wall Size Mill #180 Grit #320 Grit Mirror kg/mtr
    TS316 TS316+P TS316+P TS316+MP  
1.2 12.7 x 12.7 ○ ● ○ ○ 0.441
  15.88 x 15.88 ○ ○ ○ ○ 0.631
  19.05 x 19.05 ○ ○ ○ ○ 0.673
  22.22 x 22.22 ○ ○ ○ ○ 0.883
  25.4 x 25.4 ○ ○ ○ ○ 0.824
  31.8 x 31.8 ○ ○ ○ ○ 1.085
  38.1 x 38.1 ○ ○ ○ ○ 1.440
  50.8 x 50.8 ○ ○ ○ ○ 1.900
1.5 12.0 x 12.0 ○ ○ ○ ● 0.55
  12.7 x 12.7 ○ ● ○ ○ 0.55
  15.0 x 15.0 ○ ○ ○ ● 0.90
  19.0 x 19.0 ○ ○ ○ ● 1.17
  25.4 x 25.4 ○ ○ ○ ● 1.552
  31.8 x 31.8 ○ ○ ○ ● 1.849
  38.1 x 38.1 ○ ○ ○ ● 1.875
  50.8 x 50.8 ○ ○ ○ ● 2.489
1.6 12.7 x 12.7 ○ ○ ○ ○ 0.670
  19.05 x 19.05 ○ ○ ○ ○ 1.174
  22.22 x 22.22 ○ ○ ○ ○ 1.396
  25.4 x 25.4 ○ ● ○ ○ 1.552
  31.8 x 31.8 ○ ● ○ ○ 1.849
  38.1 x 38.1 ○ ● ○ ○ 1.875
  50.8 x 50.8 ○ ● ○ ○ 2.489
  60.0 x 60.0 ○ ○ ○ ○ 3.058
  80.0 x 80.0 ○ ○ ○ ○ 4.078
2.0 25.4 x 25.4 ○ ○ ○ ○ 1.470
  31.8 x 31.8 ○ ○ ○ ○ 1.890
  38.1 x 38.1 ○ ○ ○ ○ 2.350
  50.8 x 50.8 ○ ○ ○ ○ 3.400
3.0 25.4 x 25.4 ○ ○ ○ ○ 1.470
  38.1 38.1 ○ ● ○ ○ 3.300
  50.8 x 50.8 ● ○ ● ● 4.480
  60.0 60.0 ○ ○ ○ ○ 5.491
  80.0 x 80.0 ● ○ ● ● 7.300
  100.0 x 100.0 ● ● ● ○ 9.60
  150.0 x 150.0 ○ ○ ○ ○ 13.760
4.0 50.0 x 50.0 ○ ○ ○ ○ 6.000
5.0 50.0 x 50.0 ○ ● ○ ○ 5.556
  80.0 x 80.0 ○ ● ○ ○ 11.700
  100.0 x 100.0 ○ ● ○ ○ 14.820
  150.0 x 150.0 ○ ● ○ ○ 22.620
6.0 200.0 x 200.0 ○ ○ ○ ○ 36.320
10.0 150.0 x 150.0 ● ○ ○ ○ 45.400
  200.0 x 200.0 ● ○ ○ ○ 61.300

 

 

 

Rectangular Tube
Size 304 304 316 316 316 316 316 WT
#180 #320 #180 #320 #400 Mirror Mill kg/
Grit Grit Grit Grit Grit Finish mtr
  TSB304 TSB304 TSB316 TSB316 TSB316 TSB316 TSB316  
40 x 20 x 1.6 ○ ● ○ ○ ○ ○ ○ 1.42
50 x 25 x 1.5 * ○ ○ ○ ○ ○ ● ○ 1.90
50 x 25 x 1.6 * ● ○ ● ○ ○ ○ ○ 1.90
50 x 25 x 3.0 * ○ ○ ○ ○ ● ○ ○ 3.30
60 x 40 x 1.5 ○ ○ ○ ○ ○ ● ○ 1.90
60 x 40 x 2.0 ○ ○ ○ ○ ○ ● ○ 4.50
65 x 38 x 3.0 ○ ○ ○ ○ ○ ○ ○ 5.42
75 x 25 x 1.6 ○ ○ ○ ● ○ ○ ○ 2.42
80 x 40 x 1.5 ○ ○ ○ ○ ○ ● ○ 3.00
80 x 40 x 1.6 ● ○ ○ ○ ○ ○ ○ 3.05
80 x 40 x 3.0 ● ○ ○ ● ○ ○ ● 5.58
100 x 50 x 3.0 ○ ● ○ ● ○ ○ ● 7.36
100 x 50 x 5.0 ● ○ ● ○ ○ ○ ○ 10.80
150 x 75 x 5.0 ● ○ ○ ○ ○ ○ ○ 16.77
150 x 100 x 5.0 ● ○ ● ○ ○ ○ ○ 18.72
200 x 100 x 3.0 ○ ○ ○ ○ ○ ○ ○ 13.76
200 x 100 x 5.0 ● ○ ● ○ ○ ○ ○ 22.62

  

 

"Flat" Rectangular Tube

Size Grade Grit Availability
TSB31615050010P 50 x 10 x 1.5mm 316 316 Mirror Finish ●
TSB31617050010P 70 x 10 x 1.5mm 316 #600 ●
TSB31615050010 50 x 10 x 1.5mm 316 #320 ●
TSB30416040010P 40 x 10 x 1.6mm 304 #320 ●

 



Manufactured to ASTM A554 Available in welded grade 316 # 600 grit polish