Duplex Steel S31803 Pipes Tubes Supplier, Exporter & Manufacturer in Mumbai, India

Duplex Steel S31803 Pipes and Tubes are manufactured from a duplex stainless steel alloy designed for industrial applications that demand high mechanical strength, corrosion resistance, and dependable performance in challenging operating environments. Duplex Steel S31803 primarily contains chromium, nickel, and molybdenum, along with controlled amounts of nitrogen and other elements within the applicable material specifications. Its balanced austenitic-ferritic microstructure provides a combination of strength and corrosion resistance, helping the material withstand exposure to chloride-containing environments and resist pitting, crevice corrosion, and chloride-induced stress corrosion cracking under suitable service conditions. Duplex Steel S31803 Pipes and Tubes are available in different outside diameters, wall thicknesses, lengths, dimensional tolerances, and surface finishes to accommodate engineering drawings, fabrication requirements, and industrial project specifications.

Specification	Duplex Steel S31803 Pipes & Tubes Details
Material Grade	Duplex Stainless Steel S31803
UNS Number	S31803
Common Name	Duplex 2205
Werkstoff Number	1.4462
European Designation	X2CrNiMoN22-5-3
Pipe Specification	ASTM A790 / ASME SA790
Tube Specification	ASTM A789 / ASME SA789
Seamless Pipes	Available according to size, wall thickness, and order requirements
Welded Pipes	Available subject to manufacturing capability and specification
Seamless Tubes	Available for industrial piping and heat-exchanger applications
Welded Tubes	Available according to project requirements
Nominal Pipe Size	Commonly supplied in a range of NPS sizes, subject to availability
Outer Diameter	Standard and custom diameters as per applicable product standards
Wall Thickness	Available in various schedules and specified wall thicknesses
Pipe Length	Single random, double random, and cut-to-length options, subject to availability
Tube Length	Standard, random, and specified lengths
Manufacturing Process	Hot forming, cold drawing, rolling, and welding, depending on product form
Chemical Composition	Chromium: 21.0–23.0%; Nickel: 4.5–6.5%; Molybdenum: 2.5–3.5%; Nitrogen: 0.08–0.20%; Carbon: 0.030% max
Other Chemical Limits	Manganese: 2.00% max; Silicon: 1.00% max; Phosphorus: 0.030% max; Sulfur: 0.020% max
Tensile Strength	Minimum 620 MPa
Yield Strength	Minimum 450 MPa
Elongation	Minimum 25%, subject to applicable product standard and test requirements
Heat Treatment	Solution annealing followed by rapid cooling, as required by the applicable specification
Corrosion Resistance	Good resistance to pitting, crevice corrosion, and chloride stress corrosion cracking
Testing & Inspection	Tensile testing, flattening or flaring tests as applicable, hardness testing, and hydrostatic or nondestructive electrical testing according to the standard
Certification	Mill Test Certificate (MTC) with chemical analysis, mechanical test results, and traceability
Additional Documentation	EN 10204 Type 3.1, third-party inspection, and sour-service documentation where specified
End Finishes	Plain end, beveled end, or other specified end preparation
Surface Finish	Pickled, annealed, or other finish as applicable to the product
Packaging	Bundled, capped, strapped, and protected for transportation and storage
Applications	Oil and gas pipelines, chemical plants, desalination systems, heat exchangers, marine equipment, and pressure piping

Specification

Duplex Steel S31803 Pipes & Tubes Details

Material Grade

Duplex Stainless Steel S31803

UNS Number

S31803

Common Name

Duplex 2205

Werkstoff Number

1.4462

European Designation

X2CrNiMoN22-5-3

Pipe Specification

ASTM A790 / ASME SA790

Tube Specification

ASTM A789 / ASME SA789

Seamless Pipes

Available according to size, wall thickness, and order requirements

Welded Pipes

Available subject to manufacturing capability and specification

Seamless Tubes

Available for industrial piping and heat-exchanger applications

Welded Tubes

Available according to project requirements

Nominal Pipe Size

Commonly supplied in a range of NPS sizes, subject to availability

Outer Diameter

Standard and custom diameters as per applicable product standards

Wall Thickness

Available in various schedules and specified wall thicknesses

Pipe Length

Single random, double random, and cut-to-length options, subject to availability

Tube Length

Standard, random, and specified lengths

Manufacturing Process

Hot forming, cold drawing, rolling, and welding, depending on product form

Chemical Composition

Chromium: 21.0–23.0%; Nickel: 4.5–6.5%; Molybdenum: 2.5–3.5%; Nitrogen: 0.08–0.20%; Carbon: 0.030% max

Other Chemical Limits

Manganese: 2.00% max; Silicon: 1.00% max; Phosphorus: 0.030% max; Sulfur: 0.020% max

Tensile Strength

Minimum 620 MPa

Yield Strength

Minimum 450 MPa

Elongation

Minimum 25%, subject to applicable product standard and test requirements

Heat Treatment

Solution annealing followed by rapid cooling, as required by the applicable specification

Corrosion Resistance

Good resistance to pitting, crevice corrosion, and chloride stress corrosion cracking

Testing & Inspection

Tensile testing, flattening or flaring tests as applicable, hardness testing, and hydrostatic or nondestructive electrical testing according to the standard

Certification

Mill Test Certificate (MTC) with chemical analysis, mechanical test results, and traceability

Additional Documentation

EN 10204 Type 3.1, third-party inspection, and sour-service documentation where specified

End Finishes

Plain end, beveled end, or other specified end preparation

Surface Finish

Pickled, annealed, or other finish as applicable to the product

Packaging

Bundled, capped, strapped, and protected for transportation and storage

Applications

Oil and gas pipelines, chemical plants, desalination systems, heat exchangers, marine equipment, and pressure piping

Specification	Duplex Steel S31803 Pipes & Tubes Forms and Availability
Material Grade	Duplex Stainless Steel S31803
UNS Number	S31803
Common Designation	Duplex 2205
Applicable Pipe Standard	ASTM A790 / ASME SA790
Applicable Tube Standard	ASTM A789 / ASME SA789
General Requirements	ASTM A999/A999M or ASTM A1016/A1016M, as applicable to the product standard
Pipe Forms	Seamless pipes, welded pipes, ERW pipes, and electric-fusion-welded pipes, subject to the applicable specification
Tube Forms	Seamless tubes, welded tubes, instrumentation tubes, and heat-exchanger tubes
Section Types	Round, square, rectangular, and custom-profile sections, subject to manufacturing capability
Seamless Pipe Size	Commonly available in a range of outside diameters, including sizes up to approximately 250 mm OD from some suppliers
Welded Pipe Size	Larger diameters available, subject to manufacturer capability and project requirements
Tube Size	Small-diameter precision tubing and larger industrial tube sizes, depending on manufacturing route
Wall Thickness	Multiple wall thicknesses and pipe schedules available according to the required dimensions
Pipe Schedules	Schedule 5S, 10S, 40S, 80S, and other specified schedules, subject to size and availability
Length Availability	Single random, double random, standard, and cut-to-length options
Delivery Condition	Solution-annealed and rapidly cooled, as required by the applicable standard
Surface Finish	Annealed and pickled, bright annealed, mill finish, or polished finish, as specified
End Finishes	Plain end, beveled end, or other agreed end preparation
Dimensional Tolerances	According to the applicable product standard and customer drawings
Inspection & Testing	Chemical analysis, tensile testing, hardness testing, dimensional inspection, and hydrostatic or nondestructive testing as applicable
Additional Inspection	Positive material identification (PMI), radiographic testing, and third-party inspection when specified
Certification	Mill Test Certificate (MTC) with heat-number traceability and applicable test results
Additional Documentation	EN 10204 Type 3.1 certification and other project-specific inspection documents, where ordered
Packaging	Bundled pipes, protective end caps, strapped tubes, and wooden-box packaging where required
Customization	Special diameters, wall thicknesses, lengths, finishes, and fabrication requirements, subject to feasibility
Applications	Oil and gas, petrochemical plants, marine equipment, desalination, chemical processing, and heat-exchanger systems
Order Availability	Standard sizes, project quantities, and custom orders, subject to stock and production capacity

Specification

Duplex Steel S31803 Pipes & Tubes Forms and Availability

Material Grade

Duplex Stainless Steel S31803

UNS Number

S31803

Common Designation

Duplex 2205

Applicable Pipe Standard

ASTM A790 / ASME SA790

Applicable Tube Standard

ASTM A789 / ASME SA789

General Requirements

ASTM A999/A999M or ASTM A1016/A1016M, as applicable to the product standard

Pipe Forms

Seamless pipes, welded pipes, ERW pipes, and electric-fusion-welded pipes, subject to the applicable specification

Tube Forms

Seamless tubes, welded tubes, instrumentation tubes, and heat-exchanger tubes

Section Types

Round, square, rectangular, and custom-profile sections, subject to manufacturing capability

Seamless Pipe Size

Commonly available in a range of outside diameters, including sizes up to approximately 250 mm OD from some suppliers

Welded Pipe Size

Larger diameters available, subject to manufacturer capability and project requirements

Tube Size

Small-diameter precision tubing and larger industrial tube sizes, depending on manufacturing route

Wall Thickness

Multiple wall thicknesses and pipe schedules available according to the required dimensions

Pipe Schedules

Schedule 5S, 10S, 40S, 80S, and other specified schedules, subject to size and availability

Length Availability

Single random, double random, standard, and cut-to-length options

Delivery Condition

Solution-annealed and rapidly cooled, as required by the applicable standard

Surface Finish

Annealed and pickled, bright annealed, mill finish, or polished finish, as specified

End Finishes

Plain end, beveled end, or other agreed end preparation

Dimensional Tolerances

According to the applicable product standard and customer drawings

Inspection & Testing

Chemical analysis, tensile testing, hardness testing, dimensional inspection, and hydrostatic or nondestructive testing as applicable

Additional Inspection

Positive material identification (PMI), radiographic testing, and third-party inspection when specified

Certification

Mill Test Certificate (MTC) with heat-number traceability and applicable test results

Additional Documentation

EN 10204 Type 3.1 certification and other project-specific inspection documents, where ordered

Packaging

Bundled pipes, protective end caps, strapped tubes, and wooden-box packaging where required

Customization

Special diameters, wall thicknesses, lengths, finishes, and fabrication requirements, subject to feasibility

Applications

Oil and gas, petrochemical plants, marine equipment, desalination, chemical processing, and heat-exchanger systems

Order Availability

Standard sizes, project quantities, and custom orders, subject to stock and production capacity

Standard / Country	Equivalent Grade / Designation
USA (UNS)	S31803
Common Grade Name	Duplex 2205
ASTM Pipe Standard	ASTM A790
ASTM Tube Standard	ASTM A789
ASME Standard	SA790 / SA789
Germany (Werkstoff No.)	1.4462
Europe (EN)	X2CrNiMoN22-5-3
DIN	X2CrNiMoN22-5-3
Japan (JIS)	SUS329J3L
Sweden (SS)	SS 2377
United Kingdom (BS)	318S13
China (GB)	022Cr22Ni5Mo3N
ASTM Forging Grade	A182 F51 (for applicable forged components)
Related Duplex Grade	UNS S32205
Trade Designations	Duplex 2205, 22Cr Duplex, SAF 2205
Related Super Duplex Grade	UNS S32750 / EN 1.4410 (not a direct equivalent)

Standard / Country

Equivalent Grade / Designation

USA (UNS)

S31803

Common Grade Name

Duplex 2205

ASTM Pipe Standard

ASTM A790

ASTM Tube Standard

ASTM A789

ASME Standard

SA790 / SA789