Duplex Steel Bar

Name: Duplex Steel Bar
Brand: JAYANT IMPEX
Price: 350.0 INR
Availability: InStock

350.0 INR/Piece

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Product Details:

Tolerance h9, h11 or as required
Diameter 5mm to 250mm
Standard ASTM, ASME, DIN, EN, JIS
Technique Hot Rolled / Cold Drawn
Processing Forged / Peeled / Turned
Application Construction, Petrochemical, Oil & Gas, Marine Engineering
Finish Polished / Bright / Black
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Duplex Steel Bar Price And Quantity

Minimum Order Quantity 1 Piece
Price 350.0 INR/Piece

Duplex Steel Bar Product Specifications

Finish Polished / Bright / Black
Type Bar / Rod
Specific Use Shafts, Fittings, Valves, Construction Components
Tolerance h9, h11 or as required
Standard ASTM, ASME, DIN, EN, JIS
Diameter 5mm to 250mm
Grade UNS S31803, S32205, 2205, 2507
Processing Forged / Peeled / Turned
Length 1 Meter to 6 Meters (customized lengths available)
Application Construction, Petrochemical, Oil & Gas, Marine Engineering
Technique Hot Rolled / Cold Drawn
Material Duplex Steel

Yield Strength 450 MPa
Packaging Export Standard Packing (Bundles, Wooden Cases)
Density 7.8 g/cm3
Hardness 180-290 HB
Surface Condition Smooth, Free from Scale
Ultimate Tensile Strength 620 MPa
Corrosion Resistance Excellent resistance to stress corrosion and pitting
Magnetic Properties Ferromagnetic
Elongation 25%
Shape Round, Square, Hexagonal

Product Description

Duplex stainless steel bars are engineered with a balanced, two-phase microstructure consisting of approximately 50% austenite and 50% ferrite. This combination provides the best of both worlds: the ferritic phase delivers extremely high mechanical strength (roughly double that of standard 304 or 316 austenitic stainless steel), while the austenitic phase ensures excellent ductility and toughness.

They are highly sought after for demanding industrial hardware, fasteners, and structural applications due to their exceptional resistance to stress corrosion cracking (SCC), pitting, and crevice corrosion in high-chloride or marine environments.

Key Industrial Grades

Depending on your structural or environmental requirements, duplex bars are classified into different categories based on their alloying elements (like chromium, molybdenum, and nitrogen):

Standard Duplex (Grade 2205 / UNS S32205 / S31803): The most widely specified grade. It features 22% chromium and 3% molybdenum, offering an optimal balance of high yield strength (typically 450 MPa min) and superior general corrosion resistance. It is standard for critical industrial equipment, chemical storage, and high-purity rods.
Super Duplex (Grades 2507, F55, F61 / UNS S32750, S32760): Highly alloyed with 25% chromium and up to 4% molybdenum. These grades reach a Pitting Resistance Equivalent Number (PREN) above 40, delivering exceptional tensile strengths (up to 770 MPa min) and advanced protection in aggressive fluids, hot chlorides, and subsea environments.

Available Product Options

Industrial suppliers offer these bars across multiple finishes (bright, smooth-turned, or peeled) and certified specifications to suit heavy-duty engineering projects:

Standard 2205 Grade Bars

Duplex Steel 2205 Round Bar is an elite choice for general industrial processing, marine engineering, and chemical handling. It delivers a reliable 620 MPa tensile strength and 450 MPa yield strength alongside strong resistance to localized crevice corrosion.

Material Class

Standard Duplex (UNS S32205 / S31803)

Material Class

Super Duplex (UNS S32760 / ASTM A182)

Yield Strength

450 MPa minimum

Yield Strength

550 MPa minimum

Tensile Strength

620 MPa minimum

Tensile Strength

600 to 700 MPa

Primary Use Case

Chemical processing, oil & gas components, marine engineering hardware

Primary Use Case

Offshore platforms, subsea pipelines, high-temperature aggressive fluids

Key Feature

Excellent resistance to stress corrosion cracking, moderate machinability

Key Feature

Extremely high alloy content, PREN > 40 for superior pitting protection

If your system operates under standard marine or chemical processing environments where high stress and chloride presence are concerns, the Duplex 2205 profile offers an incredibly cost-effective, high-strength solution. For heavy-duty subsea structural elements or high-temperature acidic exposure, stepping up to Super Duplex F55 provides the necessary mechanical safety margins.

Durable and Versatile Duplex Steel Bars

Designed for multiple industries, Duplex Steel Bars combine high mechanical strength with superior corrosion resistance. Their well-tailored shapes and surface conditions make them suitable for harsh environments, such as those encountered in marine engineering and petrochemical plants. The bars are manufactured according to strict international standards (ASTM, ASME, DIN, EN, JIS), ensuring reliability and compatibility for global projects.

Precision Engineering and Customization

These steel bars are produced using advanced hot rolled or cold drawn techniques, and further refined by forging, peeling, or turning processes. Custom length, diameter, and shape options cater to unique requirements in construction, shafts, fittings, and valves. Meticulous attention to surface quality and dimensional tolerance guarantees the bars meet stringent project specifications.

FAQ's of Duplex Steel Bar:

Q: How are Duplex Steel Bars manufactured to ensure quality and performance?

A: Duplex Steel Bars are produced using either hot rolling or cold drawing techniques, followed by processes like forging, peeling, or turning to achieve precise dimensions and excellent surface finish. Each bar undergoes strict quality checks according to international standards such as ASTM, ASME, DIN, EN, and JIS.

Q: What makes Duplex Steel Bars suitable for corrosive environments?

A: These bars are crafted from duplex-grade stainless steel, offering excellent resistance to stress corrosion cracking and pitting. This, combined with smooth, scale-free surfaces, makes them an ideal choice for marine, petrochemical, oil & gas, and harsh industrial environments.

Q: When should I use Duplex Steel Bars over conventional stainless steel bars?

A: Duplex Steel Bars are preferred when both high strength and superior corrosion resistance are required, such as in offshore structures, chemical plants, or desalination projects, where standard stainless steel may not perform as well under extreme conditions.

Q: Where can Duplex Steel Bars be utilized effectively?

A: They are widely applied in construction, marine engineering, petrochemical, and oil & gas industries. Common uses include shafts, valves, fittings, and construction components that demand both durability and corrosion resistance.

Q: What are the benefits of using Duplex Steel Bars with polished or bright surfaces?

A: Polished or bright finishes not only enhance appearance but also further improve corrosion resistance and cleanliness, which is important for components exposed to corrosive fluids or requiring aesthetic finishes in architectural applications.

Q: How does the export standard packaging protect Duplex Steel Bars during transit?

A: Export standard packing, including bundles and wooden cases, ensures that the bars are protected from physical damage, contamination, and corrosion during storage and transportation, maintaining their integrity upon delivery.

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