Stainless Steel Square Tube

Stainless Steel Square Tube | ASTM A554 304 / 304L / 316L

Our Stainless Steel Square Tubing is manufactured according to ASTM A554 and is available in grades 201, 304, 304L, and 316L. It offers excellent corrosion resistance, high strength, and a clean appearance, making it suitable for both structural and decorative applications.

We specialize in the production of cold drawn seamless stainless steel tubes and precision welded stainless steel tubing. In addition to standard square and rectangular tubes, we also manufacture a wide range of special-shaped stainless steel tubes, including:

• Hexagonal Tubing

• Octagonal Tubing

• Triangular Tubing

• Twelve-Point Steel Tubes

• Diamond-Shaped Tubing

• D-Shaped Tubing

• Oval & Elliptical Tubes

• Custom Non-Standard Shaped Tubes

Custom sizes and OEM/ODM production are available according to your drawings or samples.

✅ Product Types Available

• Welded Stainless Steel Square Tubing

• Seamless Stainless Steel Square Tubing

• Rectangular Stainless Steel Tubing (Welded & Seamless)

• Elliptical / Oval Stainless Steel Tubing

• Custom Special-Section Tubes

✅ Technical Specifications

Size Range

• Outer Diameter (OD): 1/2″ to 8″

• Wall Thickness: 0.062″ to 0.375″

• Length: 6m standard or custom cut-to-length

Surface Finish

• 2B

• Pickled

• Mill Finish

• 180 Grit / 240 Grit Polish

• Mirror Polish (upon request)

Material Grades

• 201 / SUS201 / S20100

• 304 / SUS304 / 1.4301

• 304L / SUS304L / 1.4306

• 316L / SUS316L / 1.4404

Standards

• ASTM A554 – Mechanical Stainless Steel Tubing

• ASTM A312 / A249 – Welded Stainless Steel Tubes

• ASTM A500 – Structural Tubing

• ASTM A813 – Seamless Stainless Steel Pipe

✅ Manufacturing Process

• Welded pipe formed from stainless steel strip

• Seam welding + online bright annealing

• Cold drawn reshaping for accurate dimensions

• Straightening & polishing

• Eddy current / hydrostatic testing before delivery

✅ Product Features

• Excellent corrosion resistance

• Smooth surface, uniform thickness

• High dimensional accuracy

• Strong mechanical properties

• Easy to weld, cut and fabricate

• Available in customized design/section shapes

✅ Applications

Stainless Steel Square Tubing is widely used in:

• Architectural and structural applications

• Furniture frames and metal fabrication

• Automotive and transportation components

• Marine hardware

• Medical and food equipment

• Agricultural machinery

• Handrails and support frames

✅ Ordering Options

To get a quotation, please confirm the following:

1. Quantity (meters, tons, or pieces)

2. Material grade

3. Size (OD × Wall Thickness)

4. Length

5. Surface finish

6. Seamless or welded

7. Standard requirement (ASTM, DIN, GOST, etc.)

Marking: Heat No. / Grade / Size / Standard
HS Code:

• 730640 – Welded Stainless Steel Tubing

• 730441 – Seamless Stainless Steel Tubing