What is Duplex Steel?

Duplex steel is a stainless steel with ferritic and austenitic microstructure offering high strength and corrosion resistance.

What is ASTM A182 F51?

ASTM A182 F51 is the most widely used duplex steel grade for piping components.

Is duplex steel better than 316 stainless steel?

Duplex steel offers higher strength and better chloride stress corrosion cracking resistance.

Can duplex steel be used in seawater?

Yes, duplex steel is widely used in marine and seawater systems.

Can duplex steel be welded?

Yes, using appropriate welding procedures.

Does Nascent Fittings & Piping Inc. export worldwide?

Yes, we supply industrial piping products globally.

Material · DSS

Duplex Steel
Piping Solutions.

Duplex & super duplex fittings and flanges in F51/F53/F55/F60. High-strength chloride-resistant supply with MTCs and global project export support.

Discover

EN 10204 3.1NACE MR0175ISO 9001PEDIBR

Get a Quote Talk to Sales

Overview

About Nascent Fittings & Piping Inc.

Nascent Fittings & Piping Inc. is a global manufacturer, supplier and exporter of duplex steel fittings, flanges, forged fittings and piping components.

Available Forms

Pipe FittingsForged FittingsFlangesOutletsReducersCapsTeesElbowsStub EndsPipe Nipples

Duplex Steel

Precision-engineered for critical service

Specifications

Material Properties

Material Family

Duplex Stainless Steel

Corrosion Resistance

Excellent

Oxidation Resistance

Excellent

Strength

Very High

Weldability

Good

Machinability

Moderate

Heat Resistance

Excellent

Cryogenic Service

Performance

Key Advantages

Excellent resistance to chloride stress corrosion cracking
Higher strength than 304 and 316 stainless steel
Excellent pitting and crevice corrosion resistance
Reduced wall thickness requirements
Long service life
Excellent fatigue resistance
Suitable for offshore and marine service

Use Cases

Industries & Applications

Oil & GasPetrochemicalChemical ProcessingPower GenerationMarineDesalinationOffshore PlatformsSubsea PipelinesFPSO SystemsHeat ExchangersPressure VesselsWater Treatment

Why Nascent Fittings Inc.

Global exporter
Third-party inspection support
Fast delivery
Custom manufacturing
Technical support

Grades

Available Grades

Specs shown for reference — confirm exact grade and standard with our technical team for your duty conditions.

F44

High alloy duplex stainless steel.

UNS: S31254
Werkstoff: 1.4547

F45

Duplex stainless steel with excellent corrosion resistance.

UNS: S31803
Werkstoff: 1.4462

F51

Most common duplex grade.

UNS: S31803
Werkstoff: 1.4462

F60

High strength duplex steel.

UNS: S32205
Werkstoff: 1.4462

F61

Premium duplex steel for aggressive service.

UNS: S32550
Werkstoff: 1.4507

UNS S31803

Standard duplex stainless (22Cr) commonly supplied to ASTM A815 / A182 F51.

UNS: S31803
Werkstoff: 1.4462
Best For: General duplex piping

UNS S32205

Modern dual-certified duplex chemistry aligned with F60 / 2205 practice.

UNS: S32205
Werkstoff: 1.4462
Best For: High-strength duplex service

UNS S32750

Super duplex 25Cr grade for severe chloride and high-strength applications.

UNS: S32750
Werkstoff: 1.4410
Best For: Super duplex chloride resistance

UNS S32760

Super duplex with tungsten additions for aggressive seawater and process media.

UNS: S32760
Werkstoff: 1.4501
Best For: Aggressive seawater and process fluids

Product Range

Duplex Steel Products

View all products

Duplex Steel

Duplex Steel Customised Bends

View product

Duplex Steel

Duplex Steel Customised Bends

Duplex Steel

Duplex Steel Flanged Reducer

View product

Duplex Steel

Duplex Steel Flanged Reducer

Duplex Steel

Duplex Steel Barred Tee

View product

Duplex Steel

Duplex Steel Barred Tee

Duplex Steel

Duplex Steel 180 degree Return Cap

View product

Duplex Steel

Duplex Steel 180 degree Return Cap

Duplex Steel

Duplex Steel Buttweld Fittings

View product