Square & Rectangle Tube
Atlantic Stainless stocks and supplies a full range of stainless steel square and rectangular tubing in multiple grades, finishes, and sizes. These versatile structural products are used in everything from architectural frameworks to mechanical support systems due to their excellent strength, clean aesthetics, and corrosion resistance.
Whether you’re looking for off-the-shelf tubing or need cut-to-length custom orders, we provide precision processing, competitive pricing, and fast delivery.
Common Applications
Stainless steel square and rectangular tubes are trusted in industries where strength, hygiene, and durability are critical:
- Architecture & Design
- Construction
- Food Processing
- Marine Applications
- Automotive & Transportation
- Fabrication & Manufacturing
Atlantic Stainless offers both standard mill finish and polished tubing in stock to meet aesthetic and functional requirements.
Available Grades
Grade: 304 Characteristics: Excellent corrosion resistance, easy to fabricate and weld Common Applications: Architecture, furniture, fabrication
Grade: 304L Characteristics: Low carbon content for improved weldability Common Applications: Sanitary and welded structures
Grade: 316 Characteristics: Superior resistance to chlorides and harsh chemicals Common Applications: Marine, chemical processing, coastal installations
Grade: 316L Characteristics: Lower carbon version for enhanced corrosion and welding integrity Common Applications: Food-grade and marine applications
Finish Options
Mill Finish: As-produced surface with no added polishing Best For: Industrial and structural applications
Polished (180–320 grit): Brushed or mirror finish for clean, decorative appearance Best For: Architectural and sanitary uses
Pickled & Passivated: Chemically cleaned to remove scale and enhance corrosion resistance Best For: Food, marine, and chemical applications
Polishing is available on one or multiple sides, depending on project specifications.
Tubing Sizes & Tolerances
- Square Tube Sizes: ½” x ½” to 8″ x 8″ OD
- Rectangular Tube Sizes: 1″ x ½” to 12″ x 6″ OD
- Wall Thickness: 0.035″ (20 gauge) to ½” wall
- Length: Standard 20′ lengths; custom lengths upon request
- Tolerances: Per ASTM A554 or A312 (depending on process)
- Available Forms: Welded and seamless; cold drawn or hot rolled
We can cut tubing to precise lengths, polish to specified finishes, and deburr all edges upon request.
Request a Quote or Custom Length
Whether you’re fabricating a frame, building a sanitary system, or designing an architectural feature, Atlantic Stainless has the stainless steel tubing you need. Our high-quality tubing is available in various sizes and finishes, ensuring it meets the demands of your specific project. Each piece is carefully cut, polished, and shipped to your exact specifications, so you can count on precision and reliability every time.
Need assistance choosing the right tubing for your application? Our team is here to help. Request a quote today!