120x120mm Thick Wall Stainless Steel Square Tube SS201 304 316 | VVINSCO
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LARGE-SIZE WELDED STAINLESS STEEL TUBING
120×120mm Thick Wall Stainless Steel Square Tube
SS201 / SS304 / SS316 | 1.0-6.0mm Wall | Custom Length
Manufactured for equipment frames, architectural metalwork, machinery and made-to-drawing fabrication. Dimensions, tolerance, finish and processing are confirmed against the approved quotation or drawing.
What Is a 120×120mm Stainless Steel Square Tube?
A 120×120mm stainless steel square tube is a welded hollow section with equal outside dimensions on all four sides. VVINSCO supplies this size in SS201, SS304 and SS316, with wall thicknesses from 1.0 to 6.0mm and lengths of 5.85m, 6m, 6.1m, 7m or cut-to-length. Surface options include 2B, BA, No.1, No.4, hairline and polished finishes.
Why Buyers Specify This Tube
Large Square Profile
The 120×120mm section provides a clean, balanced geometry for frames and fabricated structures.
Multiple Wall Options
Select 1.0-6.0mm wall thickness according to fabrication and engineering requirements.
Grade Selection
SS201, SS304 and SS316 support different budgets and service environments.
Custom Fabrication Review
Cutting, drilling, punching and welding can be reviewed from drawings; bending depends on wall, radius and finish.
Product Specifications
| Specification |
Details |
| Brand |
VVINSCO |
| Product Type |
Large-size welded stainless steel square tube / hollow section |
| Outside Size |
120 ×120mm |
| Wall Thickness |
1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 5.0 and 6.0mm; custom combinations subject to review |
| Material Grades |
SS201, SS304 / 304L, SS316 / 316L |
| Manufacturing Type |
Formed and longitudinally welded; welding method confirmed by order specification |
| Reference Standards |
ASTM A554, JIS G3446 or EN 10296-2; final standard confirmed before production |
| Surface Finish |
BA, 2B, No.1, No.4, hairline, brushed or polished |
| Length |
5.85m, 6m, 6.1m, 7m or cut to length |
| Tolerance |
According to the selected standard, approved drawing or purchase order |
| Processing Service |
Cutting, drilling, punching and welding; other fabrication reviewed by drawing |
| Inspection Document |
EN 10204 3.1 material test certificate available when specified in the order |
| Packing |
Protective film and woven bag bundles; wooden-case packing available for LCL or project orders |
| Manufacturer |
Foshan Winsco Metal Products Co., Ltd. |
| Place of Origin |
Foshan, Guangdong, China |
120×120mm Theoretical Weight Reference
Calculated using a stainless-steel density of 7.93g/cm³ and a simplified square-corner formula. Actual weight varies with grade, corner radius and permitted wall tolerance.
| Nominal Wall |
1.0mm |
1.5mm |
2.0mm |
2.5mm |
3.0mm |
3.5mm |
4.0mm |
5.0mm |
6.0mm |
| Approx. kg/m |
3.77 |
5.64 |
7.49 |
9.32 |
11.13 |
12.93 |
14.72 |
18.24 |
21.70 |
| Approx. kg/6m |
22.65 |
33.83 |
44.92 |
55.91 |
66.80 |
77.60 |
88.31 |
109.43 |
130.18 |
Reference formula: 4 × wall thickness × (outside size - wall thickness) × 0.00793. Use confirmed theoretical or actual weight for commercial settlement.
Actual Product Detail Views
These close-up production photos show the open section, nominal wall profile, formed corners and longitudinal weld area. Final dimensions, tolerances and finish are manufactured to the confirmed order specification.
Welded Square Tube Stock
Heavy-Wall Cut-End Detail
Wall and Corner Profile
Material Selection Guide
SS201
A cost-focused option for suitable indoor or mild environments.
SS304 / 304L
A common choice for balanced fabrication performance and general corrosion resistance.
SS316 / 316L
Selected for more demanding chloride or corrosive service conditions.
Can the Tube Be Cut, Drilled or Welded?
Yes. VVINSCO can review cutting, drilling, punching and welding from your drawing. Bending feasibility depends on the outside size, wall thickness, bend radius, grade and finish. For close-tolerance fabrication, confirm the drawing and approve a sample before mass production.
Frequently Asked Questions
What material grades are available for 120 ×120mm square tubing?
VVINSCO offers SS201, SS304 / 304L and SS316 / 316L, subject to specification and order quantity.
What wall thicknesses can be supplied?
The listed range is 1.0-6.0mm. Confirm the exact size-and-wall combination before ordering.
How much does a 120 ×120mm stainless steel square tube weigh?
Weight depends on wall thickness, grade, corner radius and tolerance. The table above provides theoretical reference values; commercial weight is confirmed in the quotation.
Can length and surface finish be customized?
Yes. Standard project lengths and cut-to-length service are available, with mill, 2B, brushed, hairline or polished finishes subject to confirmation.
What information is required for a quotation?
Send the outside size, wall thickness, grade, length, finish, quantity, standard, tolerance, processing details, destination port and application.
Request a Quote from VVINSCO
With 23+ years of stainless steel manufacturing and export experience, VVINSCO supports specification confirmation, inspection documentation and custom fabrication review for international buyers.
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