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Duplex Steel S31803 Forged Fittings

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

Price 500.0 INR/ Kilograms

Get a Price/Quote

MOQ : 1 Kilograms

Duplex Steel S31803 Forged Fittings Specification

Recyclable
Yes

Tensile Strength
>= 620 MPa (minimum)

Temper
Annealed

Diameter
1/8 NB to 4 NB (NPS)

Size
Available in standard and custom sizes

Heat Resistance
Yes

Product Form
Forged

Material Composition %
Cr 21.0-23.0%, Ni 4.5-6.5%, Mo 2.5-3.5%, N 0.08-0.20%, Fe Balance

Width
Customizable as per requirements

Hardness
Less than 290 HB

Coating Type
Typically uncoated, optional passivation or pickling

Corrosion Resistant
Highly resistant to chloride stress corrosion and pitting

Product Name
Duplex Steel S31803 Forged Fittings

Steel Type
Duplex Stainless Steel

Steel Product Type
Forged Pipe Fittings

Grade
S31803 (UNS S31803 / F51)

Thickness
Standard as per ASME/ANSI B16.11 or custom

Shape
Elbow, Tee, Coupling, Cap, Union, Plug, Cross, Nipple

Steel Standard
ASTM A182, ASME SA182

Surface
Smooth, shot blasted, or as specified

Composition
Duplex microstructure (ferrite and austenite)

Application
Petrochemical, Chemical, Oil & Gas, Power Generation, Marine, Pulp & Paper Industries

Dimension (L*W*H)
As per standard or custom drawing

Weight
Varies as per size and type

Color
Metallic Silver/Grey

Material Grade
S31803

Finish Type
Machined, shot blasted, pickled

Usage
Joining, terminating or controlling fluid flow in piping systems

Impact Strength
>= 54 J at -46C

End Connection Type
Socket Weld (SW), Screwed (NPT/BSP)

Testing
100% PMI tested, hydrostatic tested, ultrasonic tested

Magnetic Properties
Slightly magnetic due to duplex structure

Marking
Grade, size, rating, heat number as per standards

Weldability
Good, preheating not required

Standards Compliance
ASME B16.11, MSS-SP-79/83/95/97, BS 3799

Pressure Rating
Class 2000, 3000, 6000, and 9000 lbs

Intergranular Corrosion Resistance
Excellent

Duplex Steel S31803 Forged Fittings Trade Information

Minimum Order Quantity
1 Kilograms

Delivery Time
7 Days

About Duplex Steel S31803 Forged Fittings

Duplex Steel S31803 forged fittings are essential parts of the piping system, widely used due to their high strength, corrosion resistance, and excellent mechanical properties. These fittings are made from duplex stainless steel, an S31803 type of stainless steel with a balanced composition of ferrite and austenite. This composition provides excellent strength and corrosion resistance, allowing S31803 forged fittings to be used in high-stress applications in various industries.

Superior Corrosion Resistance and Durability

Duplex Steel S31803 Forged Fittings are renowned for their high resistance to chloride-induced stress corrosion, pitting, and intergranular attack, making them ideal for harsh environments. The duplex microstructure ensures strength, durability, and a service life superior to standard stainless steel, even under high pressure and temperature conditions up to 300C.

Comprehensive Standards and Rigorous Testing

Each fitting conforms to global standards like ASME B16.11, MSS-SP-79/83/95/97, BS 3799, and ASTM A182, guaranteeing dimensional and quality consistency. Rigorous assessments, including 100% Positive Material Identification (PMI), hydrostatic, and ultrasonic testing, certify the reliability and safety of every fitting delivered.

Wide Application and Adaptability

Designed for flexibility, these forged fittings come in a variety of shapes and connection types, suitable for a wide range of industries including petrochemical, oil & gas, marine, and pulp & paper. Their ability to be customized in size, thickness, and surface finish allows integration into both standard and specialized piping systems.

FAQ's of Duplex Steel S31803 Forged Fittings:

Q: How are Duplex Steel S31803 Forged Fittings tested to ensure quality and reliability?

A: Each fitting undergoes rigorous testing, including 100% PMI (Positive Material Identification) testing, hydrostatic pressure tests, and ultrasonic testing. These procedures validate material composition, pressure integrity, and detect internal flaws, ensuring product safety and compliance with industry standards.

Q: What are the main benefits of using Duplex Steel S31803 Fittings in industrial piping systems?

A: These fittings provide high tensile strength, excellent resistance to chloride stress corrosion, pitting, and intergranular corrosion, and retain great impact strength even at low temperatures. Their robust properties ensure long-lasting, leakproof operation in challenging environments such as petrochemical and marine applications.

Q: When should Socket Weld (SW) or Screwed (NPT/BSP) end connections be selected?

A: Socket Weld (SW) connections are preferred in systems requiring higher pressure containment and leak-tight joints, while Screwed (NPT/BSP) connections are ideal for lower-pressure systems or when disassembly is needed. Selection depends on pressure rating, assembly requirements, and maintenance considerations.

Q: Where can Duplex Steel S31803 Forged Fittings be applied?

A: These fittings are extensively used in sectors like petrochemical, chemical processing, oil & gas, power generation, marine, and pulp & paper industries. Their adaptability to varied service conditions and corrosive environments makes them well suited to critical applications in fluid handling systems.

Q: How is the marking and traceability ensured for these fittings?

A: All fittings are marked in accordance with ASME and industry standards, featuring grade, size, pressure rating, and heat number for full traceability. This ensures that every fitting's origin and specification can be quickly identified during installation or audits.

Q: What customization options are available for these forged fittings?

A: Customers can specify width, wall thickness, surface finish (machined, shot blasted, pickled), and dimensions according to standard or custom drawings. The fittings cover a diameter range of 1/8 NB to 4 NB and can be manufactured to suit unique piping layouts and requirements.

Q: What makes Duplex Steel S31803 suitable for use at low temperatures and under pressure?

A: S31803's duplex structure gives it excellent impact strength (54 J at -46C) and good weldability without the need for preheating. It maintains mechanical stability up to high pressures (Class 2000 to 9000 lbs), making it a robust choice for demanding conditions.

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