Duplex Welded Tube

The Specialty Pipe and Tube division of Penn Stainless Products carries both stock and nonstandard welded tube in duplex alloys in both light-gauge and heavy-wall thickness. We can provide:

  • Custom sizes and lengths
  • Rapid Delivery of custom orders, thanks to our large inventory of sheet and plate products
  • An extensive list of value added services for duplex welded tube
  • Welded tube per customer specification
  • Extensive Processing and Testing services

Made-to-Order Duplex Welded Tube Capability Overview

Outside Diameter Range for Duplex Tube

Duplex Welded Tube diameters up to 96″ can be supplied. More Info Get a Quote

Wall Thickness Range for Duplex Tube

Depending on the diameter of the tube and the type of duplex, tube wall thicknesses can range from .010″ to 3″. More Info Get a Quote

Lengths for Duplex Tube

Duplex tubes up to 60″ long are possible depending on the nominal tube size, the wall thickness and the material type. Butt welding may be required to produce some longer lengths. More Info Get a Quote

Duplex Grades Available in Welded Tube

2003 - 2101 - 2205 - 2304 - 2507 - Zeron 100 More Info Get a Quote

Welded Duplex Tube Supply Highlights

Custom Orders of Specialty Duplex Tubes in as fast as 1 or 2 weeks.

Penn Stainless stocks an extensive inventory of plate and sheet in some duplex alloys. Thanks to our large inventory and our mill partners, we ensure fast lead times for even for hard to find duplex alloys that have nonstandard wall thicknesses, lengths, or chemistries. Quick turn delivery times vary based on specific product requirements. Get a Quote

More Info

Technical Question?

Large Diameter & Heavy Gauge Welded Tube

Penn Stainless can supply made-to-order welded tube up to 96″ diameter with up to 3″ thick walls! We also offer non standard diameters like 7-1/2″ or 9″ for many duplex alloys. Get a Quote More Info Technical Question?

Custom Processing & Quick Delivery of Off the Shelf Duplex Alloys

Our extensive inventory of welded tube in a variety of sizes and grades enables us to cut, pack and ship your order quickly from a number of conveniently located stocking locations. Get a Quote More Info Technical Question?

Duplex Tube Cutting Services 

Penn Stainless has in-house tubular cutting services for diameters ranging from 1/16″ to 28″. Products with larger diameters can be cut with our partner pipe and tube mills. More Info Technical Question?

Duplex Tube Value Added Services

Value added processing services available include polishing, beveling, honing/turning, heat treating and annealing. Tubes can be polished per customer request in #4 polish, #6 polish, #7 polish and/or #8 mirror finish. Some ID Sizes can also be polished. More Info Technical Question?

Testing Services

We can deliver welded tube that meets any of the following testing requirements: positive material identification, liquid penetrant testing, radiographic testing, ultrasonic testing, charpy impact testing and corrosion testing. More Info Technical Question?

Duplex Tube Technical Resources

Penn Stainless has over 30 years of technical service and project management experience. Our resources include metallurgists, welding experts, specification developers, a rapid delivery team, and inventory management services. More Info Technical Question?

Duplex Alloy Grades

Duplex 2003

Duplex 2003 lean duplex stainless steel is a molybdenum-enhance, proprietary duplex stainless steel alloy available through ATI metals. More Info Get a Quote

Duplex 2101

LDX 2101 is a duplex (austenitic-ferritic) stainless steel with relatively low contents of alloying elements. The grade has high mechanical strength, similar to that of other duplex grades. Its good corrosion resistance is on par with that of most standard stainless steel grades. More Info Get a Quote

Duplex 2205

 Duplex 2205 is a two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades. More Info Get a Quote

Duplex 2304

Duplex 2304 is a 23% chromium, 4% nickel, molybdenum-free duplex stainless steel whose structure is a balance of ferritic and austenitic. It has general corrosion resistance similar or better than Alloys 304L and 316L but with yield strength nearly double that of austenitic stainless steels.  More Info Get a Quote

Duplex 2507

Duplex 2507 (UNS S32750) is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. More Info  Get a Quote

Please refer to our stainless steel welded tube data sheets, which inclue our duplex products.  Or, contact Penn Stainless for current availability.

Duplex Welded Tube Specifications


This specification discusses  grades of seamless, welded, and heavily cold worked austenitic and ferritic/austenitic stainless steel sanitary tubing. More Info  Technical Question?


This specification discusses seamless stainless tubing for use in mechanical applications where corrosion-resistant or high-temperature strength is needed. More Info Technical Question?


This specification discusses standard requirements for grades of nominal wall thickness, stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking.  More Info
Technical Question?

Call us at 1-800-222-6144 for more information