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Duplex Steel S31803 Pipes

Name: Duplex Steel S31803 Pipes
Brand: Skyland Metal & Alloys Inc.
Price: 500.0 INR
Availability: InStock

Price 500.0 INR/ Piece

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MOQ : 1 Piece

Duplex Steel S31803 Pipes Specification

Corrosion Resistant
Excellent pitting and cracking resistance

Diameter
1/2 NB to 24 NB (or larger as per requirements)

Material Composition %
Cr: 21-23%, Ni: 4.5-6.5%, Mo: 2.5-3.5%, N: 0.08-0.20%, Mn: 2%,

Coating Type
Uncoated / Custom coating on demand

Tensile Strength
620 MPa

Hardness
290 HB

Size
Custom sizes available

Temper
Annealed

Width
Customizable as per requirement

Product Form
Pipe

Recyclable
Yes

Heat Resistance
Yes

Product Name
Duplex Steel S31803 Pipes

Steel Type
Duplex Stainless Steel

Steel Product Type
Seamless / Welded Pipes

Grade
S31803

Thickness
1.5 mm to 50 mm

Shape
Round Pipe

Steel Standard
ASTM A790 / ASTM A928 / ASTM A789

Surface
Pickled, Polished, Annealed, or as specified

Composition
22% Cr, 5-6.5% Ni, 3-3.5% Mo, balance Fe, with Mn, Si, N, P, S

Application

Dimension (L*W*H)
As per order specifications

Weight
Depends on size and length

Color
Metallic Silver

Material Grade
UNS S31803

Finish Type
Smooth / Polished

Usage
Industrial, Process Piping, Structural Applications

Delivery Condition
Solution annealed & pickled (standard)

Availability
Readily available in stock sizes; custom orders accepted

Length
Single Random, Double Random, Cut Lengths

Packing
Standard export seaworthy packing or as required

Density
7.8 g/cm3

End Type
Plain End, Bevel End, Threaded, Grooved

Manufacturing Process
Seamless, ERW, Welded, Fabricated

Testing Methods
Ultrasonic, Eddy Current, Hydrostatic, PMI

Minimum Yield Strength
450 MPa

Magnetic Properties
Slightly Magnetic

Impact Strength
Minimum -40C Charpy V-Notch: 100 J

Weldability
Good

Duplex Steel S31803 Pipes Trade Information

Minimum Order Quantity
1 Piece

Delivery Time
7 Days

About Duplex Steel S31803 Pipes

Duplex Steel 31803 pipes are also known as UNS S31803 or SAF 2205 and are a dual-phase alloy combining austenitic and ferritic microstructures in a near-equal ratio. This two-phase structure gives the material roughly twice the yield strength of standard austenitic grades like 304 or 316. The grade offers outstanding resistance to chloride stress corrosion cracking, pitting, and crevice corrosion, making it a practical choice for aggressive chemical and marine environments. Industries including oil and gas, chemical processing, marine engineering, and water treatment rely on it for its strength, long service life, and lower material cost per unit of performance.

Exceptional Strength and Corrosion Resistance

Duplex Steel S31803 Pipes offer a tensile strength of 620 MPa and a minimum yield strength of 450 MPa, delivering robust performance in high-pressure and corrosive applications. Their composition-22% chromium, up to 6.5% nickel, and 3.5% molybdenum-ensures exceptional resistance to pitting, crevice corrosion, and chloride-induced cracking, making them suitable for oil & gas, chemical, and marine industries.

Versatile Manufacturing and Sizing Options

These pipes are available through seamless, ERW, welded, and fabricated manufacturing processes to accommodate various application needs. Customizable in diameter (1/2 NB to 24 NB or more), thickness (1.5-50 mm), and length (single, double random, or cut-to-size), they can be tailored for structural and process piping systems requiring precision and durability.

Assured Quality and Testing

Every Duplex Steel S31803 Pipe undergoes rigorous quality controls, including ultrasonic, eddy current, hydrostatic, and positive material identification (PMI) testing. These comprehensive assessments guarantee excellent structural integrity, consistency, and safety for critical industrial operations.

FAQ's of Duplex Steel S31803 Pipes:

Q: How are Duplex Steel S31803 Pipes manufactured?

A: Duplex Steel S31803 Pipes can be produced using seamless, ERW (Electric Resistance Welded), welded, and fabricated processes. These methods enable flexibility in meeting specific customer requirements and application standards.

Q: What testing methods are applied to Duplex Steel S31803 Pipes?

A: Testing includes ultrasonic inspection, eddy current testing, hydrostatic pressure testing, and PMI (Positive Material Identification) to ensure structural integrity, correct composition, and consistent quality before shipment.

Q: Where can Duplex Steel S31803 Pipes be used?

A: These pipes are widely used in oil & gas pipelines, petrochemical plants, chemical processing facilities, marine engineering, power plants, desalination projects, and construction, thanks to their corrosion resistance and mechanical strength.

Q: What are the available end types and finishes for these pipes?

A: Duplex Steel S31803 Pipes are supplied with various end types such as plain end, bevel end, threaded, or grooved. The surface can be pickled, polished, annealed, or finished as specified to suit different industrial applications.

Q: Why choose Duplex Steel S31803 Pipes over conventional stainless steel pipes?

A: These pipes provide superior corrosion resistance-especially against pitting and stress corrosion cracking-and offer higher mechanical strength. Their dual-phase microstructure also ensures better weldability and longer service life in aggressive environments.

Q: Can these pipes be customized for size, length, and coating?

A: Yes, they are available in standard and custom sizes, lengths (single random, double random, or cut lengths), and can be supplied uncoated or with special coatings as per project specifications to meet diverse industrial needs.

Q: What is the benefit of solution annealed and pickled delivery condition?

A: Solution annealing relieves stresses and enhances corrosion resistance, while pickling removes surface oxides, leaving the pipes smooth and clean-ensuring maximum durability and performance in demanding applications.

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