Unicorn Metal Industries is a leading duplex steel fasteners manufacturer in India, offering
high-strength and
corrosion-resistant fastening solutions for demanding industrial applications. Duplex steel
fasteners are widely
used in environments exposed to chlorides, marine conditions, and aggressive chemicals due to their
excellent
combination of mechanical strength and corrosion resistance.
Our product range includes bolts, nuts, washers, stud bolts, threaded rods, and custom-designed
fasteners
manufactured in accordance with international standards such as ASTM, DIN, ISO, and ASME. These
fasteners are
part of our comprehensive industrial fasteners
range and are
extensively used in offshore platforms, oil & gas installations, desalination plants, and chemical
processing
industries. With strong expertise in alloy processing and advanced manufacturing capabilities, we
produce both
standard and custom fasteners tailored to meet specific engineering and project requirements.
Duplex steel fasteners are manufactured from a dual-phase microstructure that combines austenitic
and ferritic
stainless steel properties. This unique structure provides higher strength than conventional
stainless steel
fasteners along with excellent resistance to stress corrosion cracking, pitting, and crevice
corrosion.
Grades such as Duplex 2205 and Super Duplex 2507 are widely used due to their high chromium,
molybdenum, and
nitrogen content, which enhances resistance to chloride-induced corrosion. These fasteners are ideal
for highly
aggressive environments where standard materials may fail. At Unicorn Metal Industries, duplex
fasteners are
produced using controlled forging and machining processes to ensure precision and consistent
performance,
similar to high-performance solutions such as Inconel
Fasteners and Hastelloy
Fasteners used in
extreme industrial conditions.
| Specification | Range | Notes |
|---|---|---|
| Diameter | M3 – M56 | Custom sizes available |
| Length | Up to 300 | Project dependent |
| Thread Type | Metric / UNC / UNF | Standard & custom |
| Material | Duplex Steel | 2205, 2507 |
| Surface Finish | Passivated, PTFE, Coated | Corrosion protection |
| Manufacturing Method | Forging / CNC Machining | High precision |
| Standards | ASTM, ASME, DIN, ISO | International compliance |
| Grade | Standard | Characteristics | Typical Applications |
|---|---|---|---|
| Duplex 2205 | ASTM F51 | High strength, good corrosion resistance | Oil & gas, chemical |
| Super Duplex 2507 | ASTM F53 | Excellent pitting & crevice resistance | Offshore, marine |
| Duplex 31803 | ASTM | General-purpose duplex | Industrial equipment |
| Super Duplex 32760 | ASTM | Extreme corrosion resistance | Seawater systems |
Manufacturing precision is essential for duplex steel fasteners due to their application in critical industrial systems. At Unicorn Metal Industries, fasteners are produced using controlled forging, machining, and threading operations designed to maintain material integrity and dimensional accuracy.
| Manufacturing Process | Description | Application | Advantage |
|---|---|---|---|
| Hot Forging | High-temperature forming of duplex steel | Heavy-duty bolts | Enhanced strength |
| CNC Machining | Precision shaping and threading | Custom fasteners | Tight tolerances |
| Thread Rolling | Cold-formed threads | Stud bolts | Improved fatigue resistance |
| Heat Treatment | Controlled thermal processing | High-performance fasteners | Strength optimization |
| Surface Finishing | PTFE, passivation, coatings | Corrosive environments | Corrosion resistance |
| Dimensional Inspection | Precision measurement | All fasteners | Consistent accuracy |
| Mechanical Testing | Strength verification | Critical applications | Performance reliability |
| Property | Typical Range | Unit | Importance |
|---|---|---|---|
| Tensile Strength | 620–900 | MPa | High load capacity |
| Yield Strength | 450–650 | MPa | Structural stability |
| Hardness | 250–320 | HB | Wear resistance |
| Elongation | 15–25 | % | Ductility |
| Corrosion Resistance | Excellent | — | Harsh environments |
| Temperature Resistance | Up to 300 | °C | Industrial performance |
We manufacture a wide range of duplex steel fasteners designed for high-strength and corrosion-resistant applications across industrial sectors.
All fasteners are available in standard sizes as well as custom configurations based on engineering drawings and project specifications.
Duplex steel fasteners are widely used in industries where corrosion resistance and mechanical
strength are
critical. In offshore and marine environments, they are used in structures exposed to seawater,
offering
excellent resistance to chloride-induced corrosion.
In oil and gas and chemical processing industries, duplex fasteners are used in pipelines,
pressure vessels, and
equipment handling aggressive conditions. They are also widely used in desalination plants where
high salinity
demands superior durability. Due to their strength and corrosion resistance, duplex steel
fasteners are
preferred for critical applications requiring long-term reliability.
Selecting the right manufacturer is critical when fasteners are used in corrosive or
high-pressure environments.
Unicorn Metal Industries produces duplex steel fasteners that meet strict engineering and
performance standards
for industrial applications.
Our manufacturing operations focus on precision, material traceability, and controlled
production processes.
Each batch is made using certified duplex grades and inspected at multiple stages to ensure
dimensional accuracy
and consistent mechanical properties. We also manufacture custom fasteners based on drawings and
specifications,
including non-standard sizes and configurations, while supporting bulk supply and timely
delivery for
project-based requirements.
Maintaining consistent quality is essential in the production of duplex steel fasteners due to
their use in
critical applications. At Unicorn Metal Industries, strict quality control procedures are
followed at every
stage to ensure compliance with industry standards.
The process includes raw material verification, dimensional inspections, and mechanical testing
such as tensile
strength and hardness. Final checks ensure that only approved products are supplied, delivering
reliable
performance in demanding industrial environments.
In addition to duplex steel fasteners, Unicorn Metal Industries manufactures a complete range of industrial fasteners in various materials.
If you are looking for a reliable Duplex Steel Fasteners Manufacturer in India, Unicorn Metal
Industries can
support your requirements with high-quality, precision-engineered fastening solutions.
Our team manufactures both standard and custom duplex steel fasteners suitable for demanding
industrial
applications. Contact us today to discuss your specifications or request a quotation for your
project
requirements.
