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Duplex Pipe

Duplex Pipe

What is Duplex Pipe used for?

A Duplex Pipe is composed of a microstructure of ferritic and austenitic grade of components this gives these pipes excellent strength and stability. These pipes are typically utilized in

  • Pollution control applications
  • Pulp and paper manufacturing systems
  • Chemical processing of fluids and gases
  • Oil and gas exploration and refining
  • Marine applications
  • Chemical process plants
  • Communication networks

Is 2205 Stainless Steel Tube expensive?

The price of stainless steel 2205 is expensive due to its unique manufacturing process, which is very complicated. The pipes in this grade are composed of two grains of stainless steel material namely austenitic and ferritic. The two-phase microstructure component offers higher strength and considerable corrosion resistance properties. These modules are stronger than normal grades of ferritic or austenitic components further, validating its higher costs.

UNS S31803 Pipe vs ASTM A790 UNS S32205 Material

A UNS S31803 Pipe and ASTM A790 UNS S32205 material have more similar characteristics than differences. The products from both these grades are used in some of the hardest and inhospitable production systems and applications. The major or the most noticeable difference between these grades is the higher nitrogen content in the S32205 grade. The nitrogen acts as an extra safety shield to the existent surface from corrosion and oxidation.

What are Alloy 2205 Pipes?

Alloy 2205 pipes are composed of an austenitic and ferritic grain microstructure with a 50-50 balance composition. These pipes are able to merge the qualities of both these structures and eliminate any weakness. Their unique composition gives these pipes superior mechanical strength and high resistance against pitting and cracking due to corrosion. These alloys have high strength if they are alloyed with nitrogen. Apart from this, the pipes in this grade have good abrasion, resistance to erosion, and good fatigue resistance. They possess a high-energy absorption rate with low thermal expansion.

2205 Duplex Steel Seamless Pipe Welding Process

Duplex steel pipes have excellent weldability and can be welded by most general procedures which are used in a standard austenitic grade of stainless steel. Most of the steel in this grade possess an alloyed filler which has 2% extra nickel concentration. These fillers ensure that the product doesn’t have to be heat treated after the fabrication process. Some of these processes include

  • Shielded metal arc welding
  • Gas tungsten arc welding TIG
  • Gas metal arc welding MIG
  • Flux-cored arc welding
  • Submerged arc welding
  • Laser welding
  • Resistance welding
  • High-frequency welding
  • Plasma arc welding

Duplex Tube Corrosion

Duplex Tubes are high-grade austenitic modules that are highly resistant to stress corrosion cracking. They possess the same resistances as standard grades of stainless steel. These tubes can be used in a range of alkaline and acidic environments. Their high tolerance to intergranular corrosion gives them enhanced protection in chlorine sulfide systems.

Duplex Steel Tubing Characteristics

Some of the features of Duplex Steel Tubing include

  • Two-phase microstructure containing austenitic and ferritic microstructure.
  • Twice as strong as standard austenitic and ferritic grades
  • Excellent toughness, mechanical strength, and ductility.
  • Lower in costs compared to austenitic grade tubes
  • Superior resistance against corrosion and cracking due to acids
  • Good weldability

2205 Duplex Steel Seamless And Welded Tubes Supplier In India

Duplex Seamless Pipe Sizes

  • Size: 4 - 219mm
  • Thickness: 0.5 - 20mm
  • Length: Single, Double Random & Cut Length

Sizes of Duplex UNS S31803 Welded Pipe

  • Size chart: 5.0 - 1219.2 Milimeter
  • Thickness Chart: 0.5 - 20 Milimeter
  • Length: Double, Single Random, Cut Length

Duplex pipes

Know More About Astm A790 Uns S32205 Material Specification, Properties And Price In India

Duplex Pipe Specification

SpecificationASTM A790 / ASME SA790
FinishPolished, AP (Annealed & Pickled), BA (Bright & Annealed), MF
OriginEuropean, Japanese, Korean, US, Russian, Indian (Strictly No Chinese Material)
Material Test Certificate (MTC) provided by duplex smls Pipe suppliers

ISO 14001:2015, PED, ISO 9001:2005, Ultrasonic Testing (UT), NDE, EIL, Radiographic Testing (RT), IBR,

MarkingAll Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer’s request.)
Thicknessexact 0.25, 0.28, 0.32, 0.37, 0.41, 0.51, 0.61, 0.71, 0.91, 1.11, 1.15, 1.41 mm
size5.0 mm – 1219.2 mm
Supplier of Duplex 2205 Pipes offer various shapesRound, Oval, Triangle, Semi-Round, Semi-oval, Rhomboid, Square, Rectangle, Hollow, Elliptical, Hollow, Semi-Rhomboid,
Outside Dia.6.00 Milimeter OD up to 914.4 Milimeter OD, Sizes up to 24 Inch NB available stock, Outside Dia Size Steel pipe available Ex-stock
TypeERW / Seamless / Fabricated / Welded / CDW
Thickness Range0.3 milimerer – 50 milimerer, SCH10, SCH 5, SCH 80, SCH 40, SCH 160, SCH 80S,SCH XXS, SCH XS
FormSquare Pipes, Round Pipes, Rectangular Pipe
Length Double Random ,Single Random & Required Length End: Beveled, Plain,Treaded
Dual certified supplier Dual certified Duplex Tube suppliers in India, accordance to certify ASME SA790 and ASTM A790 American specifications
End Protection of pipesPlastic Caps
Surface Finish:2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Pipes, Finish as per customer Requirements
Delivery ConditionAnnealed and Pickled, Polished, Bright Annealed, Cold Drawn
Inspection, Test ReportsMill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports
PackingPacked in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests
SpecialsSizes and Specifications other than above can be manufactured on request
Our PresenceUSA, Canada, Australia, UK, Malaysia, Poland, Iran, Italy, Singapore, UAE
Material Test Certificates (MTC)Material Test Certificates (MTC) as per EN 10204/ 3.1B and EN 10204 3.2
Seamless Pipe size5.0 mm – 1219.2 mm
ScheduleSCH5, SCH10, SCH40, STD, SCH80, SCH160 Supplier
Pipe EndPlain End, Beveled End, Treaded.
Size4 to 219mm W. T.: 0.5 to 20mm
Duplex Pipe Suppliers in India

Duplex Pipe

Duplex Pipe

2205 Stainless Steel Tube

2205 Stainless Steel Tube

Equivalent of Duplex 2507 Tube

LDX 2101 Pipe1.4162/ S32101Lean
DX22021.4062/ S32202Lean
RDN 9031.4482/ S32001Lean
LDX 2304

1.4362/ S32304

2205 Pipe1.4462/ S31803/ S32205Standard
2507 Pipe1.4410/ S32750Super Duplex
Zeron 100 Pipe1.4501/ S32760Super Duplex
Ferrinox 255/ Uranus 2507Cu Pipe1.4507/ S32520/ S32550Super Duplex
Ferralium 255 Pipe1.4501/ UNS S32760Super Duplex
Hyper1.4658/ S32707 / S33207HDSS

Duplex Stainless Tube Chemical Composition

2101 LDX21.
RDN 903201.
Zeron 1002573.20.25-0.70.7
Uranus 2507Cu

2205 Stainless Steel Tube Mechanical Properties

S31803 / S32205DensityMelting PointYield Strength (0.2%Offset)Tensile StrengthElongation
7.8 g/cm31350 °C (2460 °F)Psi - 80000 , MPa - 550Psi - 116000 , MPa - 80015 %

Physical Properties of SAF 2205 Pipe

Physical propertyValue
Melting Range:2525-2630°F

Specific Heat Capacity at 212°F

0.119 Btu/lb/°F

Thermal Conductivity at 212°F

8.4 Btu/hr-ft-°F

Poisson's Ratio


Elastic Modulus at 72°F

29 x 10 psi

India's Biggest Stockist And Exporter Of Uns S31803 Pipe, Check Duplex 2205 Seamless Pipe Price List Ex Mumbai

Duplex Pipe Price

DescriptionPrice in USDPrice in INRPrice in UAE Dirham
DUPLEX PIPES (TST-SAF2205-3-SCH10)(101.32 MTR)$8.3762730.75
DUPLEX 2205 SMLS PIPE : 2 SCH 80S X 39.37L$29.862,263109.73

Duplex Pipe Material Grade

  • Duplex 2205 Pipe
  • Duplex 2205 Tube
  • Super Duplex 2507 Pipe
  • Super Duplex 2507 Tube
  • ASTM A789 UNS 32520
  • ASTM A789 UNS 32900
  • ASTM A789 UNS 31260

Duplex Tubing Roughness

Outside surface roughnesInside surface roughness
RA 20 defect level max. 50 μmRA 20 defect level max. 20 μm

Duplex SS Tubing Uses

  • Off-Shore Oil Drilling Companies
  • Petrochemicals Plants
  • DSS Pipes for production and transportation of oil and gas
  • Condensers
  • Power Generation
  • Gas Processing
  • Heat exchangers
  • Structural and mechanical components
  • Cooling pipes
  • Sea Water Equipment
  • Chemical and Pharmaceutical Equipment

Duplex pipe uses

Types of Duplex Stainless Steel Tubing

UNS S31803 Pipe
UNS S31803 Pipe
UNS S32205 Pipe
UNS S32205 Pipe
Duplex Seamless Pipe
Duplex Seamless Pipe
Duplex Tubes
Duplex Tubes
Duplex 2205 Seamless Pipe
Duplex 2205 Seamless Pipe
Duplex Welded Pipe
Duplex Welded Pipe
Duplex Stainless Steel Pipe
Duplex Stainless Steel Pipe
Duplex Tubing
Duplex Tubing
Duplex Round Pipe
Duplex Round Pipe

Get instant delivery Of 2 Inch Duplex 2205 Pipe, Weight Chart Of Duplex Stainless Steel Pipe, Duplex Pipe Suppliers in India.

Never Buy Duplex Steel Tubing Without Checking The Mill Test Report And En 10204/3.1b Certificate

Duplex Stainless Steel Pipe Test Certificate

  • EN 10204/3.1B
  • Raw Materials Certificate
  • 100% Radiography Test Report
  • Third Party Inspection Report, etc

Duplex 2205 Pipe Pressure Rating

Pipe O.D.
Wall Thickness Of Pipe (Inches)
Working Pressure (Psig)

Characterisitcs of Duplex 2205 Pipe

  • High resistance to stress corrosion cracking, fatigue, and erosion
  • Higher heat conductivity and lower thermal expansion compared to austenitic steels
  • Outstanding and uniform resistance to pitting and crevice corrosion
  • Good sulfide stress corrosion cracking resistance
  • Useful up to 600°F
Stock Of Alloy 2205 Pipes And Tubes In Schedule 10 To Sch 40 In Smls And Erw, Cut To Length Facility Available Without Paying For Extra And Waste Material

Duplex Steel Tube Supplier

Duplex 2205 Pipe4 inch ASTM A790 Duplex Steel Seamless Pipes
ASTM A790 Duplex Steel PipesDuplex Stainless Steel 2205 Welded Pipes
Duplex Steel 1.4462 Seamless Steel PipeS32205 Duplex Steel Cold Drawn Welded Pipes
ASTM A790 Duplex Steel Welded PipesDuplex Ss 2205 Cold Drawn Pipes
Duplex Stainless Steel 2205 ERW PipesSchedule 5S Duplex S32205 Seamless Pipes
Duplex Ss 2205 EFW PipesSchedule 40 Duplex Steel 2205 Pipes
Duplex S32205 Cold Drawn Seamless PipesDuplex Stainless Steel 2205 Precision Pipes
Duplex 2205 Seamless Steel Precision PipesHigh pressure Steel 1.4462 Pipes
Duplex Steel 2205 Cold Drawn Seamless PipesUNS S32205 Electropolished Pipes
Duplex Stainless Steel 2205 Custom PipesDuplex 2205 Cold Drawn Pipes
UNS S32205 Round PipesSS 2205 Exhaust Pipes
Duplex S32205 Square PipesS32205 Duplex Steel Thin Wall Pipes
UNS S32205 Rectangular PipeSmall diameter Stainless Steel 2205 pipe
Steel 1.4462 Cold Drawn PipeCold Drawn 2205 Welded Pipe

Value Added Services of Duplex 2507 Pipe

duplex pipe value

UNS S31803 Pipe Thickness

TypesOut diameterWall thicknessLength
NB Sizes (in stock)1/8” ~ 8”SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160Upto 6 Meters
Duplex 2205 Seamless Pipe (Custom Sizes)5.0mm ~ 203.2mmAs per requirementUpto 6 Meters
Duplex 2205 Welded Pipe (in Stock + Custom Sizes)5.0mm ~ 1219.2mm1.0 ~ 15.0 mmUpto 6 Meters

Stock Range of Duplex 2205 Tube

Pipe FormSize RangeThicknessDimension Standards
2205 Duplex Seamless Pipe, Duplex Steel 2205 Seamless Pipe1/8" to 16" inchesSch 5, Sch 5s, Sch 10, Sch 10s, Sch 20, Sch 30, Sch 40s, Sch 40, Sch STD, Sch 60, Sch 80s, Sch 100, Sch 120, Sch XS, Sch XXS, Sch 160ANSI B36.10, ANSI B36.19, ANSI B36.19M

Duplex Welded Pipe Advantage

  • More hard to machine and form than austenitics material
  • Double design strength of austenitic and ferritic stainless steels
  • Weldable with extra care in thick material
  • Temperature limit 300 °C maximum
  • Better toughness down to minus 80 °C but not suitable for cryogenic applications
  • Various range of corrosion resistance to match application
  • Best for resistance to stress corrosion cracking

Duplex Pipe Astm Code

ASTMA182 / ASME SA182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61.

Grade Comparison Chart of 2205 Duplex Stainless Steel Pipe

China GBISO Unified Digital CodeASTM / ASMEUNS codeEN CodeCompany Commercial Grade
022Cr23Ni4MoCuNS23043S32304S323041.4362SAF2304 (Sandvik)
022Cr23Ni5Mo3NS22053S32205S322051.4462SAF2205 (Sandvik)

Prestige quality Duplex Seamless Pipe Supplier in India offer in EN, DIN, ISO, BS, JIS or ANSI standard.

UNS S32205 Pipe Astm Standard

  • ASTM A789(ASME SA789) Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
  • ASTM A790(ASME SA790) Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
  • ASTM A923Standard Test Methods for Detecting Detrimental Intermetallic Phase in Duplex Austenitic/Ferritic Stainless Steel
  • ASTM A928Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal
  • EN 10216-5Seamless steel tubes for pressure purposes
  • GB/T 21832-2008 Austenitic–Ferritic(duplex) grade stainless steel welded tubes and pipes
  • GB/T 21833-2008 Austenitic-Ferritic (duplex) grade stainlee steel seamless tubes and pipes

Heat Treatment of Astm A790 Uns S32205 Material

UNS DesignationTemperatureQuenching
S318031870-2010 °F [1020-1100°C]Rapid cooling in air or water
S322051870-2010 °F [1020-1100°C]Rapid cooling in air or water
S315001800-1900 °F [980-1040°C]Rapid cooling in air or water
S325501900 °F [1040°C] min.Rapid cooling in air or water
S312001920-2010 °F [1050-1100°C]Rapid cooling in water
S312601870-2010 °F [1020-1100°C]Rapid cooling in water
S320011800-1950 °F [982-1066°C]Rapid cooling in air or water
S320031850-2050 °F [1010-1120°C]Rapid cooling in air or water
S321011870 °F minQuenched in water or Rapidly cooling in other means
S322021870-1975 °F [1020-1080°C]Rapid cooling in air or water
S325061870-2050 °F [1020-1120°C]Rapid cooling in air or water
S323041700-1920 °F [925-1050°C]Rapid cooling in air or water
S327501880-2060 °F [1025-1125°C]Rapid cooling in air or water
S327602010-2085 °F [1100-1140°C]Rapid cooling in air or water
S329501820-1880 °F [990-1025°C]Rapid cooling in water
S325201975-2050 °F [1080-1120°C]Rapid cooling in air or water

SP Metals is an ISO certified Duplex 2205 Seamless Pipe Supplier in India & Duplex S31803 Seamless Pipe distributor in Mumbai

Duplex Pipe Hs Code

HSN CodeProduct Description
7307Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel
73072300Butt welding fittings
7306Other tubes, pipes and hollow profiles (for example, open seam or welded, riveted or similarly closed), of iron or steel
7306110Line pipe of a kind used for oil or gas pipelines:
73061100Welded of stainless steel
7304Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel
73042400Other of stainless steel

Alloy 2205 Pipes Corrosion Resistance

Duplex stainless steel are extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulphide environments, Duplex stainless steel exhibit very high resistance to stress corrosion cracking.

Duplex 2205 Seamless Pipe Heat Resistance

The high chromium content of Duplex stainless steel that p rotects against corrosion, causes embrittlement at temperatures over about 300°C.

At low temperatures duplex stainless steels have better ductility than the ferritic and martensitic grades. Duplex grades can readily be used down to at least -50°C.

Duplex S31803 Seamless Pipe Hardness

Hardness, Max BrinellGradeYield strength, min., ksi [MPa]Tensile strength, min., ksi [MPa]Elongation in 2 in., or 50mm, min, %
290S3220570 [485]95 [655]25
290S3180365 [450]90 [620]25
297S3255080 [550]110 [760]15
290S3150064 [440]92 [630]30
290S3126065 [450]100 [690]25
280S3120065 [450]100 [690]25
310S3252080 [550]112 [770]25
290S3230465 [450]100 [690]25
290S3200165 [450]90 [620]25
300S3276080 [550]109 [750]25
310S3275080 [550]116 [800]15
290S3295070 [480]100 [690]20

Duplex Pipe Thermal Conductivity

W/(m °C)
Sandvik SAF 22051420171619
Temperature, °F68800400200600
Btu/(ft h °F)
Sandvik SAF 220581210911

Packaging of Seamless Duplex Stainless Steel Pipe

  • waterproof paper and plastic coverage
  • Wooden pallets or cases
  • Or as per customer need

Elasticity Properties of Duplex Stainless Steel Tube

Modulus of elasticity194200186180
psi x 10-6

Duplex 2205 Seamless Tube Features

  • Packaging list (laminated) placed with box/crate.
  • End of Duplex 2205 Seamless Pipe protected by plastic caps.
  • Each bundle covered with plastic for protection against extreme weather.
  • Bundles strapped with plastic strips.
  • Each radius of U-Bend tube separated by a separator.

Alloy 2205 Tubes Testing

  • IGC and PMI test
  • Pitting resistance test
  • Radiography test
  • Hydrostatic test
  • Flattening/flaring test
  • Chemical/Mechanical test

ASTM A790 Uns S31803 Duplex Seamless Tube Surface Finish

Cold drawnCDPolishedP
Bright drawnBDSlit rolled edgeSRE
Centreless groundCGHot finishedHF
Cold finishedCFHot rolled annealed and pickledHRAP
Peeled and turnedP And TRough turned/peeledRT
Smooth turnedSTPeeled and reeledPR

2205 Stainless Steel Tube Marking

  • Specification
  • Heat Number
  • Schedule (Wall Thickness)
  • Nominal tube Size
  • Manufacturer’s Symbol/ Name
  • Grade
  • Manufacturing Method

Duplex pipe marking

ASTM A790 Duplex Heat Exchanger Tubes Density


Standards of Werkstoff Nr. 1.4462 Seamless Tubes

  • DFARS Compliant
  • EN 10028-7
  • ASME SA240
  • RR SABRe Edition 2
  • ASTM A240
  • GE-S400/S1000
  • UNS S32205
  • W.NR. 1.4462

Duplex pipe standards