Duplex Steel Fasteners Manufacturer in India

Duplex Steel Fasteners are extensively used in offshore, marine, petrochemical, oil & gas, desalination, power generation, and chemical processing industries because of their exceptional corrosion resistance, high mechanical strength, superior chloride resistance, and excellent long-term durability in aggressive environments. As a leading Duplex Steel Fasteners Manufacturer in India, CEBEX STEEL INDIA manufactures and exports premium-quality duplex steel fastening solutions produced according to international ASTM, ASME, DIN, ISO, and EN standards for critical industrial applications.

Our Duplex Steel Fasteners are widely used in offshore platforms, subsea systems, pressure vessels, heat exchangers, refinery plants, seawater handling systems, marine structures, and industrial fabrication projects where superior strength and corrosion resistance are essential. We manufacture duplex steel bolts, nuts, stud bolts, threaded rods, washers, screws, anchor bolts, and custom-engineered fastening components according to customer drawings and project specifications.

At CEBEX STEEL INDIA, we utilize advanced forging, threading, CNC machining, heat treatment, and precision finishing technologies to manufacture duplex steel fasteners with excellent dimensional accuracy, superior thread quality, and dependable mechanical performance. Our products are trusted by EPC contractors, offshore engineering companies, fabrication industries, OEM manufacturers, infrastructure developers, and industrial buyers across India, Africa, the Middle East, Europe, and Southeast Asia.

Duplex Steel Fasteners Manufacturer in India – ASTM A182 F51 F60 Duplex Bolts, Nuts & Stud Bolts | Cebex Steel India

Why Choose Us as Your Duplex Steel Fasteners Manufacturer?

Choosing the right Duplex Steel Fasteners manufacturer is essential for ensuring structural reliability, corrosion resistance, pressure handling capability, and long-term industrial performance. CEBEX STEEL INDIA has established itself as a trusted Duplex Steel Fasteners Manufacturer in India through strong metallurgical expertise, strict quality control systems, and dependable worldwide export services.

We maintain complete traceability from raw material procurement to finished fastener dispatch and supply all products with EN 10204 3.1/3.2 Mill Test Certificates, inspection reports, and export documentation. Our in-house quality department performs comprehensive testing including chemical analysis, tensile testing, hardness testing, PMI testing, ferrite testing, dimensional verification, and thread inspection to ensure compliance with ASTM and customer project specifications.

Our export logistics team efficiently manages seaworthy packaging, export documentation, and international shipping for smooth global deliveries.

Product Overview & Key Features

Our Duplex Steel Fasteners are manufactured using premium-quality duplex stainless steel raw materials sourced from approved mills and processed through advanced manufacturing technologies to ensure superior corrosion resistance, durability, and high mechanical strength.

The following table summarizes the technical specifications of our Duplex Steel Fasteners:

Feature	Specification / Detail
Standards	ASTM, ASME, DIN, ISO, EN
ASTM Specifications	ASTM A182, ASTM A276, ASTM A479
Duplex Grades	F51, F60, F55
UNS Grades	S31803, S32205, S32750
Size Range	M3 to M100
Length Range	Up to 5 Meter
Fastener Types	Bolts, Nuts, Stud Bolts, Washers, Screws, Threaded Rods
Thread Types	Metric, UNC, UNF, BSW
Surface Finish	Plain, Passivated, PTFE Coated
Manufacturing Process	Hot Forged, CNC Machined, Heat Treated
Documentation	EN 10204 3.1/3.2, MTC, Inspection Reports

Types of Duplex Steel Fasteners We Manufacture & Export

Our product portfolio includes a comprehensive range of Duplex Steel Fasteners suitable for offshore, marine, pressure vessel, structural, and corrosive industrial applications. We manufacture duplex steel hex bolts, heavy hex bolts, stud bolts, threaded rods, socket head cap screws, anchor bolts, machine screws, eye bolts, U bolts, spring washers, lock nuts, countersunk screws, and foundation bolts according to international standards and industrial project requirements.

We also manufacture custom duplex steel fastening components according to customer drawings, OEM specifications, and EPC project requirements. Additional machining, passivation, coating, and heat treatment services are available according to operating conditions and project specifications.

Grades, Materials & International Standards

Material selection plays a critical role in determining chloride resistance, pitting resistance, tensile strength, weldability, and long-term operational durability. We manufacture Duplex Steel Fasteners in internationally approved grades suitable for highly corrosive industrial environments.

The following table summarizes our commonly supplied duplex steel fastener grades:

Duplex Steel Grade	UNS Number	Typical Applications	Standards
Duplex F51	S31803	Offshore Structures & Pressure Systems	ASTM A182
Duplex F60	S32205	Marine & Chemical Processing Industries	ASTM A182
Super Duplex F55	S32750	Seawater Systems & Offshore Platforms	ASTM A182

All duplex steel materials are sourced from reputed mills and supplied with complete traceability, inspection reports, and EN 10204 3.1/3.2 Mill Test Certificates.

Chemical Composition & Mechanical Properties

Every Duplex Steel Fastener supplied by CEBEX STEEL INDIA includes complete chemical composition and mechanical property reports to ensure compliance with international standards and industrial project requirements.

Chemical Composition – Duplex Steel S32205

Element	Composition (%)
Chromium (Cr)	22.0 – 23.0
Nickel (Ni)	4.5 – 6.5
Molybdenum (Mo)	3.0 – 3.5
Nitrogen (N)	0.14 – 0.20
Carbon (C)	0.03 Max
Iron (Fe)	Balance

Mechanical Properties – Duplex Steel S32205

Property	Value
Tensile Strength	620 MPa Min
Yield Strength	450 MPa Min
Elongation	25% Min
Hardness	293 HB Max

Chemical Composition – Super Duplex Steel S32750

Element	Composition (%)
Chromium (Cr)	24.0 – 26.0
Nickel (Ni)	6.0 – 8.0
Molybdenum (Mo)	3.0 – 5.0
Nitrogen (N)	0.24 – 0.32
Carbon (C)	0.03 Max
Iron (Fe)	Balance

Mechanical Properties – Super Duplex Steel S32750

Property	Value
Tensile Strength	800 MPa Min
Yield Strength	550 MPa Min
Elongation	15% Min
Hardness	310 HB Max

Our quality department conducts spectrographic analysis, ferrite testing, hardness testing, tensile testing, PMI testing, dimensional verification, and thread inspection using calibrated inspection equipment.

Equivalent Grades

Standard	Grade
ASTM	Duplex F51
UNS	S31803
WERKSTOFF NR	1.4462
DIN	X2CrNiMoN22-5-3

Standard	Grade
ASTM	Duplex F60
UNS	S32205
WERKSTOFF NR	1.4462
DIN	X2CrNiMoN22-5-3

Standard	Grade
ASTM	Super Duplex F55
UNS	S32750
WERKSTOFF NR	1.4410
DIN	X2CrNiMoN25-7-4

Dimensions, Sizes & Standards

We manufacture Duplex Steel Fasteners in sizes ranging from M3 to M100 with customized threading, machining, and coating services according to industrial project requirements. Our fasteners are manufactured according to DIN, ISO, ASTM, and ASME standards to ensure dimensional precision and industrial compatibility.

The following table summarizes commonly supplied fastener standards:

Standard	Description
DIN 933	Hex Head Bolts
DIN 931	Partially Threaded Bolts
DIN 934	Hex Nuts
DIN 975 / 976	Threaded Rods
ISO 4014 / 4017	Metric Hex Bolts
ASTM A182	Duplex Forged Fasteners

Additional machining, coating, PTFE coating, passivation, and custom threading services are available according to customer specifications.

Applications & Industries Served

Our Duplex Steel Fasteners are extensively used in industries requiring exceptional corrosion resistance, chloride resistance, and high mechanical strength. Offshore and marine industries utilize duplex steel fasteners for seawater systems, offshore platforms, subsea equipment, and marine structural assemblies because of their excellent seawater corrosion resistance and long-term durability.

Duplex steel fasteners are also widely used in petrochemical plants, oil & gas facilities, desalination plants, pressure vessels, chemical processing systems, heat exchangers, power generation projects, industrial fabrication, and heavy engineering applications operating in highly aggressive industrial environments.

Testing & Quality Assurance

Quality assurance is one of the core strengths of our manufacturing and export operations. Every Duplex Steel Fastener undergoes strict inspection and testing procedures including dimensional inspection, chemical analysis, ferrite testing, hardness testing, tensile testing, PMI testing, thread inspection, and visual surface inspection.

Our quality control department utilizes advanced inspection equipment including spectrometers, ferrite meters, hardness testing machines, thread gauges, profile projectors, and dimensional measurement systems to ensure compliance with ASTM, ASME, DIN, ISO, and customer project requirements.

Packing, Delivery & Export Capabilities

We understand the importance of secure packaging and timely delivery for industrial and export projects. Our Duplex Steel Fasteners are packed using export-grade boxes, wooden crates, palletized packaging, HDPE bags, and waterproof wrapping materials to ensure complete protection during transportation and storage.

Our export logistics department manages complete shipping documentation including commercial invoices, packing lists, certificates of origin, mill test certificates, inspection reports, and fumigation certificates for smooth customs clearance and worldwide shipping.

Exporting Duplex Steel Fasteners to Africa

As a leading Duplex Steel Fasteners Manufacturer in India, we have built a strong reputation for supplying high-quality Duplex Steel Fasteners to major industrial and infrastructure projects across Africa. Our export team understands the unique requirements of African industries and ensures smooth, timely deliveries with complete documentation, inspection reports, and international compliance standards. From offshore engineering and marine applications to desalination plants, oil & gas facilities, chemical processing systems, and power infrastructure projects, our Duplex Steel Fasteners are trusted by clients in Nigeria, Egypt, Kenya, South Africa, Ethiopia, and beyond. To learn more about our specialized solutions for the continent, visit our Africa Duplex Steel Fasteners Exporter page.

Related Alloy Fasteners – Stainless Steel, Super Duplex, Inconel, Monel, Hastelloy, Titanium, Copper Nickel

In addition to Duplex Steel Fasteners, we also manufacture and export Inconel Fasteners, Hastelloy Fasteners, Monel Fasteners, Stainless Steel Fasteners, and Titanium Fasteners. These high-performance alloy fasteners deliver exceptional corrosion resistance, superior mechanical strength, outstanding high-temperature stability, and proven long-term reliability in the most aggressive industrial and marine environments.

Our technical team is ready to assist you in selecting the ideal grade, coating, thread type, and specification for your critical applications.

Browse our full range:

Why Choose CEBEX STEEL INDIA?

Clients choose CEBEX STEEL INDIA because of our strong technical expertise, strict quality control systems, competitive export pricing, and dependable worldwide delivery capabilities. We provide flexible order quantities, fast production schedules, custom processing services, technical support, worldwide shipping, third-party inspection support, and project-based supply solutions.

Our engineering team assists clients in selecting the appropriate duplex steel fastener grades and specifications based on chloride exposure, seawater resistance requirements, pressure conditions, fabrication requirements, and mechanical performance expectations.

Frequently Asked Questions (FAQ)

What is the difference between Duplex and Super Duplex Fasteners?

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Duplex Steel Fasteners offer high strength and excellent corrosion resistance, while Super Duplex Fasteners provide even higher pitting resistance, chloride resistance, and mechanical performance for highly aggressive offshore and marine environments.

Which duplex steel fasteners are best for offshore applications?

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Super Duplex F55 fasteners are widely preferred for offshore platforms, subsea systems, and seawater applications because of their superior resistance to chloride stress corrosion cracking and seawater corrosion.

What types of Duplex Steel Fasteners do you manufacture?

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We manufacture duplex steel bolts, nuts, stud bolts, threaded rods, washers, screws, anchor bolts, socket head fasteners, and custom-engineered fastening components according to international standards and customer drawings.

Do your Duplex Steel Fasteners come with test certificates?

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Yes, all duplex steel fasteners are supplied with EN 10204 3.1/3.2 Mill Test Certificates, inspection reports, chemical analysis reports, and third-party inspection documentation upon request.

Can Duplex Steel Fasteners withstand corrosive environments?

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Yes, duplex steel fasteners are specifically designed for highly corrosive environments including seawater systems, offshore platforms, chemical processing plants, desalination facilities, and marine engineering applications.