.375″od x .035″wall Stainless Steel Round Tube T-316 Seamless
Stainless Steel Round Tube – Type 316, Seamless
Our Type 316 stainless steel round tube is a hollow cylindrical section that combines high strength with low weight and excellent corrosion resistance. Seamless tube is produced without a weld seam, providing uniform strength around the circumference and making it well suited to demanding, higher-pressure or critical applications.
Round tubing is a go-to material for railings, frames, furniture, exhaust and fluid systems, and equipment fabrication, thanks to its smooth shape, ease of bending and attractive appearance.
Key Features
Hollow round section with a smooth, consistent profile
High strength-to-weight ratio
Excellent corrosion resistance for indoor and outdoor use
Easy to cut, bend, notch and weld
Clean surface that is simple to sanitize and maintain
Offered in multiple outside diameters, wall thicknesses and lengths
About Type 316 Marine-Grade Stainless Steel
Type 316 is a molybdenum-bearing austenitic stainless steel (about 2–3% molybdenum) that is often called marine-grade stainless. The molybdenum greatly improves resistance to pitting and crevice corrosion caused by chlorides, making Type 316 the preferred choice for coastal installations, saltwater exposure, de-icing salts, chemical processing, pharmaceutical and demanding food-processing environments.
Like Type 304, it offers excellent formability, good weldability and a clean appearance, and it is essentially non-magnetic in the annealed condition. It also performs better than Type 304 in many acidic and high-temperature service conditions.
The extra alloy content makes Type 316 more expensive than Type 304, so it is best specified where the added corrosion resistance is truly needed.
Finish
Seamless construction: the absence of a weld seam gives uniform wall properties and a consistent surface, which is valuable for critical, high-integrity and precision applications.
Why Stainless Steel?
Stainless steel is an iron-based alloy containing at least 10.5% chromium. The chromium forms a thin, invisible, self-healing oxide layer on the surface that protects the metal from rust and corrosion, so stainless steel keeps its strength and appearance for years with minimal upkeep and without paint or coatings.
Common Applications
Handrails, guardrails and stair railings
Furniture, tables and display frames
Exhaust, fluid and process lines
Food, beverage and pharmaceutical equipment
Marine, automotive and trailer fittings
Architectural elements and general fabrication
Fabrication and Handling
Round tube can be cut with a tube cutter, band saw or abrasive saw and bent with a mandrel or roll bender. Use a mandrel or sand-filled technique on tight radii to prevent kinking, and weld with TIG for clean, strong joints.
Type 316 is readily welded with TIG, MIG or resistance methods using 316L filler to preserve corrosion resistance. It work-hardens, so use sharp tools, moderate speeds and good cooling when machining, and allow for springback when forming. After welding, clean and passivate the area to restore the protective surface.
Care and Maintenance
To keep stainless steel looking its best, clean it periodically with warm water, mild detergent and a soft cloth or non-abrasive pad, rinse thoroughly and dry. Always wipe in the direction of the grain or polish lines, avoid chlorine bleach and chloride-based cleaners, and do not use carbon-steel wire brushes or tools on the surface, as embedded iron particles can cause rust spots. If surface contamination does occur, a stainless steel cleaner or passivation treatment will restore the protective layer.
Sizes and Ordering
Round tube is specified by outside diameter (OD) × wall thickness. Select the OD, wall and length for your application. All dimensions listed are nominal and standard mill tolerances apply. For critical fits, structural or code-driven projects, we recommend confirming the exact dimensions and tolerances you need before ordering. If you require a size, length or quantity that is not listed, please contact us and we will be glad to help.
Type 316 stainless steel round tube (seamless) for railings, frames, furniture, process equipment and structural uses. Corrosion-resistant, strong and available in multiple…
Select options
This product has multiple variants. The options may be chosen on the product page
Type 316 stainless steel round tube (seamless) for railings, frames, furniture, process equipment and structural uses. Corrosion-resistant, strong and available in multiple…
Select options
This product has multiple variants. The options may be chosen on the product page
Type 316 stainless steel round tube (seamless) for railings, frames, furniture, process equipment and structural uses. Corrosion-resistant, strong and available in multiple…
Select options
This product has multiple variants. The options may be chosen on the product page
We provide a comprehensive selection of high-quality metal construction materials including structural steel, aluminum profiles, stainless steel sheets and tubing, carbon steel products, copper and brass materials, iron fittings, and hardware components. Our inventory is regularly updated to meet the demands of construction professionals, manufacturers, and DIY enthusiasts across North America.
Absolutely! We offer competitive bulk pricing for contractors, construction companies, and businesses. The more you order, the better your price per unit. For orders exceeding $5,000, we recommend contacting our sales team directly for a customized quote. We can also arrange special pricing for recurring orders and long-term partnerships.
We offer standard ground shipping throughout the continental United States, with typical delivery times of 5-10 business days. Expedited 2-3 day shipping is available for orders in major metropolitan areas. For heavy or bulk items, we work with specialized freight carriers to ensure safe delivery. Shipping costs vary based on weight, destination, and product type. International shipping to Canada and Mexico can be arranged upon request.
Yes, we offer custom cutting and fabrication services for many of our products. Whether you need specific lengths, widths, or custom shapes, our team can accommodate your requirements. Custom orders typically require 7-14 business days for completion, depending on complexity. Contact our customer service team with your specifications for a detailed quote and timeline.
All our metal materials meet or exceed North American standards including ASTM, ASME, and CSA certifications. Our products undergo rigorous quality control testing and come with certified test reports upon request. We maintain compliance with industry regulations and environmental standards. All materials come with documentation verifying composition, strength, and other key specifications to ensure they meet your project requirements.
We stand behind the quality of our products with a 30-day return guarantee on unused, unopened items in original packaging. All materials are warranted to be free from defects in manufacturing for one year from purchase. If you receive damaged materials or discover defects, notify us immediately. We’ll arrange replacement or refund at no charge. Custom cut or fabricated items are non-returnable unless defective.
Our experienced team is happy to provide technical guidance on material selection, specifications, and best practices for your project. Whether you need help choosing the right type of steel, calculating load capacity, or understanding coating options, we’re here to help. Contact us via email, phone, or live chat to discuss your specific needs. For complex projects, we can arrange a consultation call with our technical specialists.
Ordering is easy through our website using your preferred payment method. We accept all major credit cards (Visa, MasterCard, American Express), bank transfers, and digital payment platforms. For business accounts and bulk orders, we offer net 30 terms upon approval. You can also place orders by phone or email if you prefer personalized service. All transactions are secure and encrypted to protect your information.
