We offer stainless steel square tubing in a wide range of stainless steel grades, having 201, 304, 304L, 316L, 321 etc, stainless steels are ideal material for square tubing due to high strength, durability, and excellect corrosion resistance, square tubing is widely used for architectural and structural applications, such as architectural ornament, metalwork, machine building, furniture and sanity tools.
Stainless steel square tubing sizes and dinmensions, SS304 Square Tubing, Stainless Steel Square Pipe, Structural-grade stainless steel square tubing, stainless steel square tubing supplier.
DINGSHANG stainless produces welded square tubing with large range of sizes and dimensions, it is measured by outside diameter, the wall thickness and length, ASTM A554 is a standard specification to specify stainless steel square tubing manufacturing, Mill Finish, Polished and Not Polished surfaces are availble on request.
| Type | Welded Tube |
| Form | Square Tubing |
| Standard | ASTM A554 |
| Grades | SS 304, 316, 316L |
| OD | 1/2“ X 1/2″ – 12″ X 12″ |
| Thickness | 0.035″ – 0.12″ |
| Surface | Mill finish, Polishing, Brushed |
| Application | Decorative, Ornamental Purpose |
ASTM A554 Square Tubing
ASTM A554 specification is a common standard for welded stainless steel mechanical tubing, beside square shape tubing, and round tubing, rectangular tubing. Both as welded and annealed condition are available, square mechanical tubing can be dull mill finish and polished finish, stainless steel square tubing is polished in various grits to achieve bright surface, polishing tubing finishes include 180 Grit (#4 polish), 240 Grit, 320 Grit and a #8 mirror finish.
ASTM A554 specified stainless steel grade with prefix MT, like MT201, MT304, MT316, MT316L.
Square Tubing Dimensional Tolerances
Below are dimensional tolerances for stainless steel square tubing.
Outside Diameter Tolerances
| Outside Diameter (In/Mm) | OD Tolerance (In/Mm) |
| To 1 1⁄4 (31.8), Incl | 0.015 (0.38) |
| Over 1 1⁄4 To 2 1⁄2 (31.8 To 63.5), Incl | 0.020 (0.51) |
| Over 2 1⁄2 To 5 1⁄2 (63.5 To 139.7), Incl | 0.030 (0.76) |
| Over 5 1⁄2 To 8 (139.7 To 203.2), Incl | 0.060 (1.52) |
Wall Thickness Tolerances
± 10 % of specified wall thickness
Maximum Radii Of Corners
Stainless Steel Square Tube has inside and outside radius corners, with a protruding interior weld seam.
| Wall Thickness, In. (Mm) | Radii Of Corners, Max, In. (Mm) |
| Over 0.020 To 0.049 (0.51 To 1.24), Incl | 3⁄32 (2.4) |
| Over 0.049 To 0.065 (1.24 To 1.65), Incl | 1⁄8 (3.2) |
| Over 0.065 To 0.083 (1.65 To 2.11), Incl | 9⁄64 (3.6) |
| Over 0.083 To 0.095 (2.11 To 2.42), Incl | 3⁄16 (4.8) |
| Over 0.095 To 0.109 (2.42 To 2.77), Incl | 13⁄64 (5.2) |
| Over 0.109 To 0.134 (2.77 To 3.40), Incl | 7⁄32 (5.6) |
| Over 0.134 To 0.156 (3.40 To 3.96), Incl | 1⁄4 (6.4) |
| Over 0.156 To 0.200 (3.96 To 5.08), Incl | 3⁄8 (9.5) |
| Over 0.200 To 0.250 (5.08 To 6.35), Incl | 1⁄2 (12.7) |
| Over 0.250 To 0.375 (6.35 To 9.53), Incl | 3⁄4 (19.1) |
304 Stainless Steel Square Tubing
304 stainless steel grade is the most used material for square tubing, 304 offers good corrosion resistance and overall properties including good weldability, and formability to meet the most requirements, it is a economical selection.
316 Stainless Steel Square Tubing
316 stainless steel square tubing is more resistant to corrosion and pitting than 304 stainless steel and offers higher strength at elevated temperatures. In addition, 316L is an extra low carbon variation that helps avoid carbide precipitation due to welding.
Stainless Steel Square Tubing Dinmension
We offer stainless steel square tubing in in a variety of sizes and gauges, small diameter and large diameter sizes of square tubes are available, the smallest diameter is 8 mm. All stainless steel square ornamental tubing can be cut to your specific length.
Square tubing weight can be calculated as following formula in kg per meter
Square tubing weight formula: (OD x 4 / 3.14 -T) x T x 0.0031416 x Density
Stainless Steel Square Tubing Sizes Chart, Weight Per Meter
| External Dimensions | Wall Thickness mm | |||||||
| A x A mm | 1 | 1,2 | 1,5 | 2 | 2,5 | 3 | 4 | 5 |
| 10 x 10 | 0,294 | 0,347 | 0,422 | |||||
| 15 x 15 | 0,453 | 0,538 | 0,661 | 0,857 | ||||
| 16 x 16 | 0,485 | 0,576 | 0,709 | 0,921 | ||||
| 20 x 20 | 0,613 | 0,729 | 0,901 | 1,176 | ||||
| 25 x 25 | 0,772 | 0,921 | 1,140 | 1,495 | 1,837 | 2,167 | ||
| 30 x 30 | 0,932 | 1,112 | 1,379 | 1,814 | 2,236 | 2,645 | ||
| 35 x 35 | 1,091 | 1,304 | 1,618 | 2,133 | 2,635 | 3,124 | ||
| 40 x 40 | 1,251 | 1,495 | 1,858 | 2,452 | 3,033 | 3,602 | 4,703 | |
| 45 x 45 | 1,410 | 1,686 | 2,097 | 2,771 | 3,432 | 4,081 | 5,341 | |
| 50 x 50 | 1,878 | 2,336 | 3,090 | 3,831 | 4,559 | 5,979 | 7,349 | |
| 60 x 60 | 2,814 | 3,728 | 4,628 | 5,516 | 7,255 | 8,943 | ||
| 70 x 70 | 3,293 | 4,366 | 5,426 | 6,473 | 8,531 | 10,538 | ||
| 80 x 80 | 3,771 | 5,004 | 6,223 | 7,430 | 9,807 | 12,133 | ||
| 100 x 100 | 4,728 | 6,279 | 7,818 | 9,344 | 12,359 | 15,323 | ||
| 120 x 120 | 7,555 | 9,413 | 11,258 | 14,910 | 18,513 | |||
| 150 x 150 | 9,469 | 11,805 | 14,129 | 18,738 | 23,298 | |||
| 200 x 200 | 12,659 | 15,793 | 18,913 | 25,118 | 31,272 | |||
| 250 x 250 | 23,698 | 31,497 | 39,247 | |||||