Stainless Steel Seamless Tube Your Trusted Supplier for Seamless Tubing in Titanium, Alloy, Stainless, Nickel, and Nitronic When your project calls for seamless tubing, Stainless Shapes, Inc. is the supplier you can count on. We stock and source stainless steel tubes in a wide range of grades, sizes, and specifications across titanium, alloy, stainless, nickel, and Nitronic materials, so whatever your application requires, we can get it to you fast. With over 25 years in the metal distribution industry, strong mill relationships, and an ISO 9001:2015 certified quality management system, we deliver the right product, the right documentation, and the right experience every time. Call us at (800) 748-9811 or request a quote through our contact form to get started. What We Supply We carry seamless tubing in the most commonly requested grades, including 304/304L, 316/316L, 321, 347, duplex alloys, and more. Our inventory spans standard ASTM A213 and A269 tubing as well as specialized specs, and we offer options ranging from polished stainless tube for sanitary and aesthetic applications to precision stainless tubing for projects that demand tight tolerances and exact dimensions. We also supply square stainless tube for structural, architectural, and mechanical applications. Whether you need stainless seamless tube for chemical processing, nickel alloy tubing for extreme environments, titanium for aerospace, or Nitronic for high-wear applications, our sales team will match the right material and specification to your project. Need a size or alloy that’s hard to track down? That’s what we do best. Our sourcing team specializes in hard-to-find items and can often locate what you need faster than you’d expect. Industries We Serve Our stainless steel tubes and seamless tubing reach customers across oil and gas, chemical processing, hydraulic systems, power generation, mechanical and structural applications, and aerospace and defense. Whether you need precision stainless tubing for a critical build or polished stainless tube for a sanitary system, we understand the specs and standards your project demands, and we’re ready to supply the material to meet them. Why Choose Stainless Shapes as Your Seamless Tube Supplier? We’re a family-owned company, and we treat every order like it matters, because it does. When you work with us, here’s what you get: Broad material availability across titanium, alloy, stainless, nickel, and Nitronic seamless tubing Full product range, including polished stainless tube, precision stainless tubing, and square stainless tube options Competitive pricing backed by strong mill relationships Mill certifications and full documentation included with every shipment Fast shipping from multiple U.S. locations, with next-day delivery available A dedicated sales team that knows the material, understands your specs, and sees your order through from quote to delivery Get a Quote Today Ready to order or need help identifying the right stainless steel tubes for your application? Our experienced team is standing by. Call (800) 748-9811 or reach out through our contact form. Let us show you why customers keep coming back to Stainless Shapes! METAL WEIGHT ID & WALL METAL WEIGHT CALCULATOR Select Your Metal: 15-5 PH Stainless Steel 17-4 PH Stainless Steel Stainless 300 Series Stainless 400 Series Nickel 200 Nickel 201 Nickel 400 Nickel 600 Nickel 625 Nickel 718 Nickel X750 Nickel 800 Nickel 800H Nickel 825 Nickel 904L Titanium Monel Nitronic Select a Shape: Round Bar Square Bar Flat Bar Sheet Plate Circle Ring Hexagon Bar Round Tubing Square Tubing Rectangular Tubing Number of Pieces: Enter size information: in ft in ft in ft in ft Calculated Weights Approx. weight in lbs* *These weights should be used for estimation purposes only. Plate weight does not allow for kerf. Calculator to get ID from OD and Wall of stainless steel tube OD: Wall: ID Calculated Calculator to get Wall from OD and ID of stainless steel tube OD: ID: Wall Calculated *These results should be used for estimation purposes only. Contact us now! Whether you need a few feet or full truckloads, StainlessShapes.net delivers quality 304 stainless I beams. Standard and custom sizes available with fast shipping across the U.S. and expert service and quotes in under 24 hours. Δ Furthermore, for a prompt and accurate quote, call us today. Call - 800-748-9811 Frequently Asked Questions What are seamless tubes used for? + Seamless stainless steel tubes are used in high-pressure hydraulic systems, instrumentation lines, heat exchanger tubes, boiler and superheater tubes, chemical injection lines, cryogenic systems, aircraft hydraulics, and precision fluid handling -- wherever the absence of a weld seam is critical for pressure integrity and reliability. Which is better welded tube or seamless tube? + Seamless tubing is superior to welded tubing for high-pressure, high-cycle fatigue, and critical fluid service because there is no weld seam to be a potential failure point. Welded tube is adequate for low-to-moderate pressure structural and process applications and is less expensive. What is the difference between seamless and non-seamless? + Seamless tubes are produced with no seam -- they are extruded or pierced from solid billet stock. Non-seamless (welded) tubes are formed from flat strip and seam-welded longitudinally. Beyond the seam, there is no specific alternate designation -- both are just called welded or ERW (electric resistance welded) tube. What are the common problems with seamless pipe? + Common problems with seamless pipe/tube include wall thickness variation (seamless is harder to produce with perfectly uniform wall than welded), higher cost, and longer lead times for non-standard sizes. Seamless also requires more raw material input (starting billet), contributing to the cost premium over welded tube. What is the difference between steel pipe and seamless pipe? + The difference between steel pipe and seamless pipe is that standard pipe includes both welded (seamed) and seamless variants. Seamless pipe specifically has no weld seam. For high-pressure service, seamless pipe is specified. For structural or low-pressure fluid service, welded pipe is accepted and less expensive. What is stronger, seamless or welded pipe? + Stainless Shapes distributes seamless stainless steel tube in Grade 304, 304L, 316, and 316L. Specialty grades including 321 and 347 for elevated-temperature service are available on inquiry. All material is supplied with certified mill test reports. What industries use seamless pipes? + Stainless steel seamless tube is sized by outside diameter (OD) and wall thickness. Standard ODs range from 1/8" through several inches; wall thicknesses from 0.028" (light gauge) through heavy wall for high-pressure applications. Contact Stainless Shapes to confirm current stock in your required OD and wall combination. What is the difference between ERW and seamless tube? + The key difference between seamless and welded tubing is the presence or absence of a longitudinal weld seam. Seamless tube: no weld, manufactured by extrusion or rotary piercing; higher cost, better pressure rating. Welded tube: has a seam weld; lower cost, adequate for most structural and moderate-pressure applications. What are the properties of seamless tube material? + Stainless steel seamless tube performs well at elevated temperatures. Grade 321 (titanium-stabilized) and Grade 347 (niobium-stabilized) are the standard specifications for elevated-temperature service above 800 F where weld sensitization is a concern. Is seamless tubing the same as DOM? + Seamless stainless steel tube is specified under ASTM A269 (general service), ASTM A213 (boiler and heat exchanger tube), and ASTM A632 (small-diameter instrumentation tubing). Contact Stainless Shapes for material certified to your required specification with full CMTR documentation.
