What are the specifications of Lean Duplex 2101 Seamless Pipe?

Available in UNS S32101 (ASTM A790), OD 1/2"-20" NB, Sch 10S-80S, hot finished or cold drawn seamless construction, with nickel held around 1.35-1.7%.

Why is Duplex 2101 called "lean"?

It substitutes costly nickel with manganese and nitrogen, reducing alloy cost while still delivering strength and corrosion resistance competitive with standard austenitic grades.

Does the low nickel content affect weldability?

Filler metal selection typically compensates with slightly higher nickel content than the base metal to ensure adequate austenite formation in the weld, a standard practice for lean duplex grades.

Is 2101 suitable for chloride-containing water systems?

Yes, for moderate chloride levels typical of many water and wastewater applications, though for seawater or high-chloride brine service, standard or super duplex grades remain preferable.

Does Sakshi Forge provide Material Test Certificates (MTC) for Lean Duplex 2101 Seamless Pipe?

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

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Lean Duplex 2101 Seamless Pipe - Economical Duplex Stainless Steel Pipe | Sakshi Forge

Ultra-Low Nickel (1.5%) High-Strength Duplex Pipe Insulated from Nickel Price Volatility

Ultra-low nickel content (1.35-1.7%) substituted with manganese and nitrogen for price stability

High yield strength (≥450 MPa) allowing major pipe wall thickness reductions over 304/316

General corrosion resistance comparable to 304/316 in water and neutral process media

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

Hygienic Steel Grade

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MTC EN 10204 3.1 Included

Global Sea & Air Freight

Electro-Chemical Finish Certificate

Response turnaround: Under 2 hours

Product Profile

Lean Duplex 2101 (UNS S32101 / EN 1.4162 / LDX 2101) is an ultra-economical dual-phase stainless steel seamless pipe engineered to minimize nickel dependency by substituting costly nickel with manganese (4.0%-6.0%) and nitrogen (0.20%-0.25%). Its nickel content is reduced to just 1.35%-1.7% (compared to 8% in 304 and 10% in 316L), providing exceptional protection against global nickel market price volatility. Despite its low nickel content, Lean Duplex 2101 maintains a balanced austenite-ferrite structure with a yield strength (≥450 MPa) more than double that of 304 and 316L. Its general corrosion resistance tracks standard 304/316 in many neutral water and chemical environments. Sakshi Forge manufactures Lean Duplex 2101 seamless pipes via hot extrusion and cold drawing, followed by solution annealing. It is an ideal solution for water treatment piping, storage tanks, structural hollow sections, and transport tanker piping.

Terminology & Abbreviations

UNS S32101|S32101

Werkstoff 1.4162|1.4162

LDX 2101|LDX2101

ASTM A790 S32101|S32101

Key Technical Facts

Alloyed with 21.0-22.0% Cr, 1.35-1.7% Ni, 4.0-6.0% Mn, and 0.20-0.25% Nitrogen

Manganese and nitrogen additions stabilize the austenite phase, compensating for reduced nickel

Yield strength (0.2% offset ≥ 450 MPa) is double that of 304L and 316L austenitic stainless steels

Insulates project budgets from raw material cost surcharges driven by nickel market fluctuations

PREN rating (~26) delivers pitting and general corrosion performance matching or exceeding 304L

Manufactured via seamless hot piercing/extrusion and precision cold drawing per ASTM A790 S32101

Solution annealed at 1020°C - 1080°C followed by rapid water quench to preserve phase balance

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

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.

Lean Duplex 2101 seamless pipe is specified under UNS S32101 / ASTM A790. It features 21.5% Chromium, 1.5% Nickel, 5% Manganese, 0.22% Nitrogen, and 450 MPa yield strength.

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.