What are the specifications of Hyper Duplex S32707 Seamless Pipe?

Available in UNS S32707 (ASTM A790), OD 1/2"-20" NB, Sch 10S-80S/XXS, hot finished or cold drawn seamless construction, with PREN > 49.

What defines a "hyper duplex" grade?

Hyper duplex grades push PREN above 49 through extreme chromium (~27%), molybdenum (~4.5%), and nitrogen (~0.35%) alloying, exceeding super duplex performance in localized corrosion resistance and mechanical strength.

Why choose Hyper Duplex S32707 over Super Duplex 2507?

S32707's higher yield strength (650+ MPa) and PREN > 49 allow further wall-thickness reductions in extreme high-pressure, ultra-deepwater subsea lines where weight and extreme corrosion performance are both vital.

Does Sakshi Forge provide Material Test Certificates (MTC) for Hyper Duplex S32707 Seamless Pipe?

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

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Hyper Duplex S32707 Seamless Pipe - Extreme Performance Duplex Pipe | Sakshi Forge

Extreme-Performance Hyper Duplex Pipe with PREN ≥ 49 & 650 MPa Yield Strength

Extreme alloy formulation (27% Cr, 7% Ni, 4.5% Mo, 0.35% N) achieving an extraordinary PREN ≥ 49

Unrivaled 650 MPa yield strength enabling dramatic wall thickness and weight reduction for deepwater subsea lines

Maximum localized pitting and crevice corrosion resistance in severe high-temperature chloride/sour 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

Hyper Duplex S32707 (UNS S32707 / SAF 2707 HD) represents the absolute pinnacle of duplex stainless steel metallurgy. It is an extreme-performance dual-phase seamless pipe engineered specifically for the most punishing deepwater subsea, ultra-sour gas, and hot high-chloride chemical environments. Its heavily alloyed chemistry contains 26.0%-29.0% Chromium, 5.5%-9.5% Nickel, 4.0%-5.0% Molybdenum, and 0.30%-0.40% Nitrogen, achieving an extraordinary PREN ≥ 49. Hyper Duplex S32707 delivers unprecedented mechanical strength, with a minimum yield strength of 650 MPa (over 3 times standard 316L and 40% higher than 2205). This extreme strength allows engineers to specify ultra-thin wall schedules, enabling major weight and cost savings in subsea tie-backs and deepwater risers. Sakshi Forge manufactures Hyper Duplex S32707 seamless pipes via high-precision hot extrusion and cold drawing, followed by stringent solution annealing and rapid water quenching. It is purpose-engineered for severe subsea umbilical tubing, ultra-deepwater flowlines, and aggressive organic/inorganic acid heat exchangers.

Terminology & Abbreviations

UNS S32707|S32707

Hyper Duplex 2707|SAF2707HD

PREN 49 Duplex|PREN49

ASTM A790 S32707|S32707

Key Technical Facts

Alloyed with 26-29% Cr, 5.5-9.5% Ni, 4.0-5.0% Mo, and 0.30-0.40% Nitrogen

Pitting Resistance Equivalent Number (PREN ≥ 49) is among the highest of any commercial stainless steel alloy

Yield strength (0.2% offset ≥ 650 MPa / 94 ksi) permits ultra-thin wall design under ASME B31.3 / B31.8

Engineered for deepwater subsea environments operating under extreme hydrostatic pressure and sour fluids

Exceptional resistance to crevice corrosion in hot seawater and concentrated chloride solutions up to 90°C

High-precision hot extrusion and cold drawing process ensuring flawless seamless bore geometry

Solution annealed at 1050°C - 1140°C and rapid water quenched to prevent intermetallic phase formation

Supplied with complete heat lot traceability, EN 10204 3.1 MTC, and ASTM G48 CPT pitting 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.

Hyper Duplex S32707 seamless pipe is specified under UNS S32707 / ASTM A790 (SAF 2707 HD). It features 27% Cr, 7% Ni, 4.5% Mo, 0.35% N, 650 MPa yield strength, and PREN ≥ 49.

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.