What are the specifications of Duplex 2304 Seamless Pipe?

Available in UNS S32304 (ASTM A790), OD 1/2"-20" NB, Sch 10S-80S, hot finished or cold drawn seamless construction.

How does Duplex 2304 compare to Duplex 2205?

2304 has lower nickel and no intentional molybdenum addition, giving somewhat lower corrosion resistance than 2205 but comparable strength at a lower alloy cost.

Is Duplex 2304 a suitable substitute for 316L?

In many general and moderately corrosive services, yes - it offers meaningfully higher strength at similar or better corrosion resistance than 316L, though 316L remains preferable for the most demanding welding/fabrication-flexibility requirements.

Does 2304 require the same welding care as 2205?

Broadly yes, heat input and phase balance control remain important, though 2304's lower alloy content makes it somewhat more tolerant of welding parameter variation than higher-alloyed duplex grades.

Does Sakshi Forge provide Material Test Certificates (MTC) for Duplex 2304 Seamless Pipe?

Yes, MTC as per EN 10204 3.1 is provided with every dispatch along with inspection reports.

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Duplex 2304 Seamless Pipe - Lean-Alloyed Duplex Stainless Steel Pipe | Sakshi Forge

Lean-Alloyed Duplex Pipe Delivering Double 316L Strength at Economical Alloy Cost

Double the yield strength (≥400 MPa) of standard 304/316L for wall thickness and weight reduction

General corrosion and pitting resistance (PREN ~25) comparable to or exceeding 316L

Lower nickel/moly alloy design reduces raw material cost and price volatility

EN 10204 3.1 MTC100% PMI TestedISO 9001:2015 CertifiedHydrostatic Tested

Hygienic Steel Grade

Request Price Quote

MTC EN 10204 3.1 Included

Global Sea & Air Freight

Electro-Chemical Finish Certificate

Response turnaround: Under 2 hours

Product Profile

Duplex 2304 (UNS S32304 / EN 1.4362) is a lean-alloyed dual-phase stainless steel seamless pipe engineered as a high-strength, cost-effective alternative to standard 304L and 316L austenitic stainless steels. It omits the intentional molybdenum addition found in 2205 (carrying only trace Mo ≤ 0.60%) while maintaining a 23% Chromium and 4% Nickel dual-phase austenite-ferrite structure stabilized by nitrogen (0.05%-0.20%). This lean composition delivers double the yield strength (≥400 MPa) of 316L alongside general corrosion resistance and PREN (~25) comparable to 316L. By minimizing expensive nickel and molybdenum additions, Duplex 2304 reduces raw material cost and market price volatility. Sakshi Forge manufactures Duplex 2304 seamless pipes via hot extrusion and cold drawing, followed by solution annealing. It is widely specified for storage tank piping, structural marine frames, pulp digesters, and moderate-corrosion industrial process lines.

Terminology & Abbreviations

UNS S32304|S32304

Werkstoff 1.4362|1.4362

Lean Duplex 2304|2304

ASTM A790 S32304|S32304

Key Technical Facts

Dual-phase austenite-ferrite microstructure (~50/50 balance) without deliberate molybdenum addition

Yield strength (0.2% offset ≥ 400 MPa) is nearly double that of standard 304L / 316L stainless steel

PREN value (~25) provides general and pitting corrosion resistance equivalent to or exceeding 316L

Superior resistance to stress corrosion cracking (SCC) compared to 304L and 316L in neutral chloride media

Lower nickel (3.0-5.5%) content minimizes cost sensitivity to global nickel market fluctuations

Hot extruded and cold drawn seamless construction per ASTM A790 Grade S32304

Solution annealed at 980°C - 1060°C and rapid water quenched to lock in target phase balance

Supplied 100% hydrotested and PMI verified with full EN 10204 3.1 test certification

Why Choose Sakshi Forge

Our commitment to sterile, high-purity processing makes us a trusted manufacturing partner globally.

100% Heat Lot Traceability

Every pipe stamped with heat number matching EN 10204 3.1 MTC

Positive Material Identification (PMI)

Handheld XRF testing on every length prior to dispatch

Advanced NDT Inspection

Hydrostatic test and Eddy Current / Ultrasonic flaw detection on all orders

Precision Cold Drawing

Tighter wall thickness tolerances and superior internal bore smoothness

Custom Cut Lengths

Fixed lengths up to 12 meters or custom cut-to-length options to eliminate jobsite scrap

Ferrite & Phase Balance Testing

Ferritescope testing for duplex and super duplex grades to ensure 40-60% phase balance

High-Temperature Stabilization

Controlled heat treatment to fully precipitate carbides and optimize creep life

Pan-India & Export Freight

Fast dispatch across India and seaworthy export packing for global projects

Extensive Mill Stocking

Immediate inventory availability in standard schedules from Sch 10S to Sch 160

Third-Party Inspection Approved

Full support for TUV, SGS, DNV, Bureau Veritas, and Lloyds audits

Frequently Asked Questions

Common technical and pricing queries regarding specifications and ordering.

Duplex 2304 seamless pipe is manufactured under UNS S32304 / ASTM A790. It features 23% Chromium, 4% Nickel, 400 MPa yield strength, and a lean alloy formulation without deliberate molybdenum.

Partner with Sakshi Forge for Reliable Industrial Steel Solutions

Delivering precision-engineered flanges, pipes, and forged steel components designed for strength, durability, and performance in critical high-pressure industrial applications.