Duplex Seamless Pipe

Penn Stainless stocks some seamless duplex alloy pipe, and we can also ship from our mill depot locations.  For pipes with diameters of 1.5″ and under, custom orders can be produced in a few weeks depending on quantities and the grade.  Also, see our non standard seamless page for additional information on custom size requirements., 

We also provide extensive Processing Services and Testing Services. All services are performed in-house, allowing for reduced lead times in addition to improved products.

Duplex Seamless Pipe Overview

Product availability

Standard sizes range from 1/4″ to 12″.   Penn Stainless also provides custom sizes. More Info Get a Quote

Lengths for Seamless Duplex Pipe

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

Duplex Grades Available in Seamless Pipe

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

Seamless Duplex Pipe Supply Highlights

Custom Product

Let us know if you need custom sizes 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 Pipe 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 Pipe Value Added Services

Value added processing services available include polishing, beveling, honing/turning, heat treating and annealing. Pipes 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 Pipe 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 contact Penn Stainless for current availability.  Also, for standard Duplex sizes, please see the inventory tab on our stainless steel seamless pipe page.

Duplex Seamless Pipe Specifications


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


The specification discusses seamless and straight-seam welded ferritic/austenitic steel pipe for general corrosive service, with special emphasis on resistance to stress corrosion cracking.  More Info
Technical Question?


This specification discusses centrifugally cast ferritic/austenitic steel pipe intended for general corrosive service. More Info  Technical Question?

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