ASTM / ASME / EN Certified

Super Duplex Steel Pipes & Tubes Manufacturer & Supplier in India

Unicorn Metal Industries is a premier Super Duplex Steel Pipes & Tubes Manufacturer in India, engineering high-strength piping built for extreme industrial environments. In applications where standard stainless steel quickly corrodes or cracks under heavy stress, super duplex alloys provide double the strength and maximum resistance to chemical damage.

As a trusted Super Duplex Steel Pipes & Tubes Supplier in India, we supply mill-certified seamless, welded, and ERW piping directly from our production units. Facilities in subsea oil production, seawater desalination, and heavy chemical processing rely on our stock for long-term operational safety. Every order is delivered with complete technical reports, including EN 10204 3.1 MTC certificates and NACE sour service compliance.

We maintain a ready inventory of certified Super Duplex Steel Pipes & Tubes under ASTM/ASME A790 specifications for high-stress projects. Our stock includes UNS S32750 and UNS S32760 Duplex Steel Pipes & Tubes. Every order is custom-cut, end-protected, and fully traceable to keep your project moving forward without delay.

Request an Instant RFQ →

1/2″ NB to 24″ NBSize Range

UNS S32750 / UNS S32760Available Grades

Seamless / Welded / ERW / EFWManufacturing Types

ASTM A790 Super Duplex Steel Pipes UNS S32750 and UNS S32760

Datasheet

Technical Specifications for Super Duplex Steel Pipes & Tubes

Specification Parameter	Technical Details
Standard Specifications	ASTM A790 / ASME SA790, ASTM A928, ASTM A240
Material Grades	UNS S32750 (2507 / 1.4410), UNS S32760 (F55 / Zeron 100 / 1.4501)
Outer Diameter (OD)	1/2" NB to 8" NB (Seamless), 6" NB to 24" NB (Welded / EFW)
Wall Thickness / Schedule	SCH 10S, SCH 40S, STD, SCH 80, SCH 160, XXS (Up to 45 mm WT)
Form & Types	Seamless, Welded, ERW, EFW, Honed, Hydraulic Tubes
Quality Documentation	MTC (EN 10204 3.1 / 3.2), NACE MR0175/MR0103, TPI Clearance

UNS S32750 & UNS S32760 Super Duplex Grade Selection Overview

Choosing between UNS S32750 Duplex Steel Pipes & Tubes and UNS S32760 Duplex Steel Pipes & Tubes depends on your project's pressure limits, fluid temperature, and environmental exposure. Both grades are engineered with enhanced chromium and molybdenum levels to outperform standard metals in saltwater and acidic solutions.

As an established Super Duplex Steel Pipes & Tubes Manufacturer in India, Unicorn Metal Industries offers direct factory pricing and custom cut lengths for both major grades:

Selection Criteria	UNS S32750 Duplex Steel Pipes & Tubes	UNS S32760 Duplex Steel Pipes & Tubes
Common Trade Names	Super Duplex 2507	Super Duplex Zeron 100 / F55
Corrosion Defense Level	Exceptional protection against salt & chemical corrosion	Max protection (Enhanced with Copper & Tungsten)
Load Bearing Strength	Double the strength of regular 316L stainless steel	Double the strength of regular 316L stainless steel
Available Types	Seamless & Welded	Seamless & Welded
Seamless & Welded Stock	1/2" NB to 24" NB Ready Stock	1/2" NB to 24" NB Ready Stock
Best Used For	Subsea pipelines, RO water plants, high-pressure risers	Acid processing lines, flue-gas scrubbers, marine systems

Selecting the correct grade prevents premature pipe failure and ensures full compliance with global engineering standards. All available sizes are packaged safely and shipped with complete heat traceability for easy on-site identification.

As a leading Super Duplex Steel Pipes & Tubes Supplier in India, we ensure all products pass strict quality checks before reaching your job site.

Request Instant Wholesale Quote

Chemical Composition of UNS S32750 & S32760 Pipes

The balanced combination of chromium, nickel, and nitrogen gives super duplex piping its exceptional durability. Additional elements like copper and tungsten in S32760 provide extra shielding against aggressive chemical pitting.

Key Element	UNS S32750 (2507)	UNS S32760 (F55 / Zeron 100)
Chromium (Rust Defense)	24.00 – 26.00%	24.00 – 26.00%
Molybdenum (Pitting Protection)	3.00 – 5.00%	3.00 – 4.00%
Nickel (Structural Toughness)	6.00 – 8.00%	6.00 – 8.00%
Nitrogen (Strength Booster)	0.24 – 0.32%	0.20 – 0.30%
Copper & Tungsten Additions	—	0.5 to 1.0% each
Iron Base	Balance	Balance

Mechanical Properties of UNS S32750 & S32760 Pipes

Super duplex piping offers exceptional strength, allowing engineers to specify thinner pipe walls. This reduces overall piping weight while fully maintaining safety under high operating pressures.

Performance Attribute	Material Value	Practical User Benefit
Yield Strength (Min)	550 MPa (80 ksi)	Handles extreme internal fluid pressure without deforming.
Tensile Strength (Min)	750 MPa (109 ksi)	Resists heavy external loads and structural stress.
Pitting Resistance (PREN)	>40	High immunity to localized pinhole leaks in saltwater.
Operating Temperature	-50°C to 250°C	Reliable performance in freezing subsea or hot industrial setups.

Applications

Practical Applications of Super Duplex Steel Pipes & Tubes

These high-strength alloy profiles withstand constant wear and high fluid speeds, making them ideal for high-demand industrial systems. They are widely implemented across several core sectors for critical infrastructure and industrial systems.

APP / 01

Subsea Oil & Gas Infrastructure

UNS S32750 Duplex Steel Pipes & Tubes used in deepwater flowlines, umbilical lines, risers, and high-pressure manifold networks.

APP / 02

Marine & Desalination Utilities

UNS S32760 Duplex Steel Pipes & Tubes preferred in high-pressure reverse osmosis (RO) pumps, headers, and seawater intake lines.

APP / 03

Chemical Processing Plants

UNS S32760 Duplex Steel Pipes & Tubes essential for carrying hot acids, organic compounds, and aggressive chloride mixes.

APP / 04

Environmental Infrastructure

UNS S32750 Duplex Steel Pipes & Tubes applied in pollution scrubbers, industrial wastewater loops, and offshore cooling piping.

Super Duplex Steel Pipes Industrial Applications

Quality Assurance

Quality Testing Protocols & Certified Credentials

To guarantee total reliability on site, every batch of piping undergoes strict testing prior to factory dispatch:

Inspection / Test Type	Purpose & Field Advantage
ISO 9001:2015 Certification	Ensures reliable, standardized manufacturing quality.
EN 10204 3.1 Mill Test Report (MTC)	Verifies exact material strength and chemical makeup.
Pitting & Microstructure Checks	Confirms high resistance to corrosion and structural defects.
Non-Destructive Testing (NDT)	Hydrostatic and ultrasonic tests confirm 100% leak-free pipes.
Export & Trade Clearances	Fully certified for hassle-free customs and international shipping.

View & Download Our Full-Resolution Quality Certificates

FAQ

Frequently Asked Questions

What makes Super Duplex steel pipes better than standard stainless steel?

Super duplex steel has roughly double the strength of regular 316L stainless steel and contains much higher levels of chromium and molybdenum. This gives it far superior protection against saltwater corrosion, chemical pitting, and stress cracking.

What is the main difference between UNS S32750 and UNS S32760?

Both grades offer top-tier strength and corrosion defense. However, UNS S32760 includes added copper and tungsten, making it even more resistant to hot acidic environments and aggressive industrial chemicals.

Can Super Duplex Steel Pipes & Tubes be welded easily on site?

Yes, super duplex pipes can be welded using standard industrial techniques like TIG or MIG welding. Welders simply use matching 2509 filler material and follow standard heat guidelines to keep the weld joint strong and corrosion-resistant.

How does using Super Duplex pipes help lower project costs?

Because super duplex is so strong, engineers can use pipes with thinner walls while keeping the same pressure safety rating. Thinner pipes reduce total metal weight, making transportation, handling, and installation significantly cheaper.

What temperature range can Super Duplex Steel Pipes handle?

Super duplex pipes perform safely in temperatures ranging from -50°C up to 250°C (-58°F to 482°F). They are ideal for subsea freezing conditions as well as moderately hot chemical lines.

What sizes are available for immediate delivery from India?

We maintain ready factory stock for standard sizes (1/2" to 12" NB) in common schedules (SCH 10S, SCH 40S, SCH 80) for dispatch within 24 to 48 hours. Custom cut lengths and extra-large welded sizes are supplied on order.

Why source directly from an Indian super duplex steel pipe manufacturer?

Direct factory sourcing eliminates middleman markups, gives you access to custom cut lengths, and guarantees authentic mill test certificates with full heat traceability. You also benefit from rapid dispatch and direct technical support.

What documents are included with each shipment?

Every shipment includes EN 10204 3.1 Mill Test Reports (MTC) confirming chemical composition and mechanical properties, NACE compliance certifications where applicable, and Third-Party Inspection clearances for critical applications.