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At Hazlewood Fasteners in Canberra, Australia, our Duplex Steel S31803 bolts are engineered for extreme service conditions where corrosion, stress, and mechanical fatigue challenge the limits of conventional alloys. Purpose-built for aggressive marine, chemical, and industrial environments, these bolts deliver superior strength, remarkable chloride resistance, and uncompromising durability. Whether securing offshore platforms, desalination systems, petrochemical equipment, or pressure-rated assemblies, S31803 duplex bolts provide steadfast mechanical confidence and long-life fastening integrity. When your infrastructure demands unwavering performance in saltwater, acidic media, and high-pressure systems, our Duplex Steel S31803 bolts rise as the ultimate durable fastening solution.
Duplex Steel S31803 bolts consist of a dual-phase ferritic-austenitic microstructure enriched with chromium, nickel, molybdenum, and nitrogen. This alloy chemistry empowers them with high tensile strength, exceptional fatigue endurance, and formidable resistance to pitting, crevice corrosion, and stress-corrosion cracking in chloride-intensive environments. Balanced toughness and hardness allow stable torque retention under vibration and temperature fluctuations, while enhanced yield strength surpasses many conventional stainless steels. S31803 bolts ensure dimensional stability, long-term thread integrity, and dependable mechanical performance in demanding industrial conditions.
|
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 S31803 bolts are integral to offshore rigs, marine fabrication, seawater pipelines, salt processing units, desalination facilities, chemical plants, pressure vessels, heat-exchangers, and pulp & paper processing systems. They secure flanges, structural supports, pump and valve assemblies, pipe joints, and load-bearing equipment exposed to chloride-rich, corrosive, or highly stressed conditions. Preferred for environments where stainless steels deteriorate and carbon steels fatigue, these bolts maintain robust fastening strength in harsh industrial atmospheres. When operational reliability, corrosion-resistance, and long-term service life are critical, Duplex S31803 bolts deliver unparalleled fastening assurance.
At Hazlewood Fasteners, Duplex Steel Bolts S31803 are meticulously packaged to ensure their integrity during transit. Each bolt is securely wrapped in protective material to prevent damage, and then placed in sturdy, weather-resistant boxes or crates. Custom packaging options are available to meet specific requirements. Our efficient packaging process safeguards the quality and performance of the bolts, providing customers with reliable, ready-to-use products. This careful handling reflects our commitment to excellence and customer satisfaction.
Hazlewood Fasteners is a leading manufacturer and supplier of high-quality fasteners in Canberra, Australia, with over 8 years of experience serving global industries.
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