Duplex Seamless Tube

Penn Stainless stocks some seamless duplex alloy tube, and we can also ship from our mill depot location.  For pipes with diameters of 1.5″ and under, custom orders can be produced in a few weeks depending on quantities and the alloy.

Penn Stainless also provides Processing and Testing services, which are completed in-house to ensure reduced delivery times.

Duplex Seamless Tube Overview


Standard duplex seamless tube sizes  from 1/8″ OD thru 24″ OD. Custom sizes are also available. More Info Get a Quote

Lengths for Seamless Duplex Tube

Seamless duplex tube lengths can be catered to customer specification. More Info Get a Quote

Duplex Grades Available in Seamless Tube

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

Seamless Duplex Tube Supply Highlights

Custom Sizes

Please let us know your requirements. Quick turn delivery times vary based on specific product requirements. Get a Quote

More Info

Technical Question?

Custom Processing & Quick Delivery of Off the Shelf Duplex Alloys

Our inventory of seamless pipe and tube, along with our mill partnerships, allow us to pack and ship your order quickly. 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 pipe and 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 the inventory tab on the stainless seamless tube page, or contact Penn Stainless for current availability.

Duplex Seamless 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