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Duplex Steel S31803 Stud Bolts

Name: Duplex Steel S31803 Stud Bolts
Brand: Skyland Metal & Alloys Inc.
Price: 100.0 INR
Availability: InStock

Price 100.0 INR/ Kilograms

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MOQ : 1 Piece

Duplex Steel S31803 Stud Bolts Specification

Material Composition %
Cr 21-23%, Ni 4.5-6.5%, Mo 2.5-3.5%, N 0.08-0.2%, Fe balance

Hardness
290 HB max

Heat Resistance
Yes

Size
Custom, M6-M100, length as required

Temper
Solution Annealed

Coating Type
Typically Uncoated; passivated finish

Corrosion Resistant
Excellent to general and localized corrosion

Recyclable
Yes

Chemical Composition
22% Cr, 5-6.5% Ni, 3-3.5% Mo, Balance Fe, plus traces of Mn, C, Si, N, S, P

Tensile Strength
620 MPa min

Width
Custom/As required

Diameter
M6 to M100 (or as specified)

Product Form
Threaded Stud Bolt

Product Name
Duplex Steel S31803 Stud Bolts

Steel Type
Duplex Stainless Steel

Steel Product Type
Stud Bolts (Threaded Rods)

Grade
UNS S31803 / 2205

Thickness
As per standard dimensions (Diameter)

Shape
Cylindrical (Stud Bolt)

Steel Standard
ASTM A276, ASTM A479, ASME SA276, ASME SA479

Surface
Bright / Clean / Polished

Composition
Duplex Stainless Steel S31803

Application
Petrochemical, Chemical, Oil & Gas, Marine, Offshore, Power Plant, Structural Uses

Dimension (L*W*H)
Custom/As per requirement

Weight
Varies as per size and length

Color
Silver

Material Grade
S31803

Finish Type
Passivated / Bright finish

Usage
Flange connections, fastening, high-strength requirements

Magnetic Property
Slightly magnetic due to dual phase

Machinability
Moderate (better than austenitic stainless steel)

ISO Certification
Available as per manufacturer

Yield Strength
450 MPa min

Elongation
25% min

Resistance to Pitting
Excellent; PREN > 34

Packaging Type
Wooden boxes, Cartons, Gunny Bags, as required

Operating Temperature
-50C to 300C

Standard Specification
ASTM A193, ASTM A182 for fasteners

Availability
Ex-stock or Custom Order

Thread Type
Metric / UNC / UNF / BSW (as per requirement)

Duplex Steel S31803 Stud Bolts Trade Information

Minimum Order Quantity
1 Piece

Delivery Time
7 Days

Duplex Steel S31803 Stud Bolts About

Duplex steel S31803 stud bolts are high-strength fasteners used in heavy-duty industrial applications. This material is called 'duplex' because it has a dual-phase microstructure. It consists of roughly equal parts of ferrite and austenite. This specific balance gives the bolts better corrosion resistance than standard stainless steel, like 304 or 316. These stud bolts are commonly used in environments where chloride stress corrosion cracking is a risk.

Superior Corrosion and Pitting Resistance

Duplex Steel S31803 Stud Bolts deliver excellent resistance to both general and localized corrosion, making them ideal for applications in aggressive environments. Their PREN value exceeds 34, ensuring outstanding performance in environments where pitting corrosion is a concern. This makes them especially suited for saltwater, chemical, and offshore settings where reliability is paramount.

Robust Mechanical Properties

Boasting a minimum yield strength of 450 MPa and tensile strengths of at least 620 MPa, Duplex Steel S31803 Stud Bolts provide durability and stability in critical structural connections. Their moderate machinability allows easier manufacturing compared to standard austenitic stainless steel, furthering their versatility in precise, high-strength applications.

Wide Range of Applications and Compliance

S31803 stud bolts are used extensively across petrochemical, oil & gas, marine, power plant, and structural projects. Available as ex-stock or on-demand with full compliance to ASTM and ASME standards, these bolts can be supplied with ISO certifications, tailored dimensions, and packaging suited to each client's requirements.

FAQ's of Duplex Steel S31803 Stud Bolts:

Q: How are Duplex Steel S31803 Stud Bolts used in industrial applications?

A: These stud bolts are primarily used for flange connections, fastening assemblies in high-stress environments, and structural connections, especially in petrochemical, marine, and offshore industries due to their excellent strength and corrosion resistance.

Q: What benefits do Duplex Steel S31803 Stud Bolts offer over standard stainless steel bolts?

A: S31803 stud bolts provide higher yield and tensile strength, superior resistance to pitting and crevice corrosion, and better performance in harsh conditions. Their dual-phase structure makes them tougher and more durable than conventional austenitic stainless steel bolts.

Q: When should I choose different thread types like Metric, UNC, UNF, or BSW for these stud bolts?

A: Thread type selection depends on compatibility with existing assemblies, design requirements, and regional standards. Metric threads are common globally, while UNC, UNF, and BSW may be specified in projects aligned with British or American standards.

Q: What is the manufacturing process for Duplex Steel S31803 Stud Bolts?

A: The bolts are produced by hot or cold forming followed by threading, solution annealing, and a passivated or polished finish. Each batch undergoes rigorous quality checks to ensure compliance with ASTM and ASME specifications.

Q: Where are Duplex Steel S31803 Stud Bolts typically supplied from?

A: These bolts are available ex-stock from manufacturers, suppliers, and exporters, or can be custom-made to order. Their global availability allows them to be sourced as per project timelines and specifications.

Q: How does the moderate machinability of Duplex Steel S31803 affect production?

A: Duplex S31803 demonstrates improved machinability over most austenitic stainless steels, enabling smoother and more precise fabrication of stud bolts while reducing tool wear and production time.

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