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Punit Fasteners, a well-respected manufacturer and supplier located in Delhi, India, specializes in top-notch Duplex Steel Bolts S31803, crafted for dependable performance even in the toughest environments. These bolts are made from a unique dual-phase microstructure that combines austenite and ferrite, giving them remarkable strength, toughness, and corrosion resistance. Known for their exceptional ability to resist chloride stress corrosion cracking, pitting, and crevice corrosion, these bolts are perfect for marine, chemical, oil and gas, and structural applications. Punit Fasteners takes pride in ensuring that each bolt is precision-engineered to meet international standards, providing durable fastening solutions for critical industrial operations.
The composition of Duplex Steel Bolts S31803 includes about 21-23% chromium, 4.5-6.5% nickel, 2.5-3.5% molybdenum, along with nitrogen, manganese, and the balance being iron. This blend results in a well-balanced austenitic-ferritic structure, giving these bolts double the tensile and yield strength compared to standard austenitic stainless steels, all while maintaining good ductility and toughness. They boast excellent mechanical stability, high fatigue resistance, and outstanding protection against localized and stress corrosion, even in harsh chloride-rich environments. These features make them ideal for high-pressure and high-temperature applications across various industries.
|
Grade |
Tensile Strength
(MPa) min |
Elongation
(% in 50mm) |
Yield Strength
0.2% Proof (MPa) min |
Hardness
Rockwell C (HR C) |
|---|---|---|---|---|
| Duplex Steel Bolts S31803 |
621 |
25 |
448 |
21 max |
|
Material |
Specification |
Standards |
Size
|
Length |
|
Duplex Steel S31803
|
IS
BS
ASTM
|
ASTM / ASME – A/ SA 479 / 479 |
3 mm
to
200 mm
|
M02 to M30
|
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Duplex Steel Bolts S31803 are widely used in demanding industries due to their high strength and corrosion resistance. They are ideal for applications in marine environments, chemical processing, oil and gas industries, and construction. These bolts are commonly employed in critical structures like pipelines, pressure vessels, and marine equipment. Their durability and resistance to stress corrosion cracking make them suitable for high-pressure and high-temperature environments, ensuring reliable performance and longevity in challenging conditions.
Duplex Steel Bolts S31803 are extensively used in situations that demand durability, strength, and corrosion resistance. They’re commonly found in offshore platforms, subsea pipelines, and shipbuilding, thanks to their ability to endure seawater and chloride exposure. In chemical processing plants, they guarantee long-lasting performance in both acidic and alkaline environments. The power generation, desalination, and heavy engineering sectors also rely on these bolts for their structural integrity under extreme conditions. Their impressive combination of strength and corrosion resistance minimizes maintenance needs and extends service life, making them a preferred choice in many applications.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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