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Pengkumta Fasteners, located in Bangkok, Thailand, has built a solid reputation as a manufacturer and supplier of Super Duplex Steel Washers. These washers are crafted to deliver outstanding durability, strength, and corrosion resistance. Each product is designed with precision and produced under rigorous quality control standards, ensuring they perform reliably even in the toughest conditions. Renowned for their toughness and ability to withstand harsh environments, Pengkumta’s Super Duplex Steel Washers are trusted by industries worldwide, including oil and gas, marine, chemical processing, desalination, and construction, where safety and long-term reliability are paramount.
These washers are made from a super duplex stainless steel alloy that features a well-balanced microstructure of austenite and ferrite, enhanced with chromium, molybdenum, and nitrogen. This unique composition offers exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, even in environments rich in chlorides. With a yield strength of around 550 MPa and a tensile strength exceeding 750 MPa, these washers blend mechanical strength, toughness, and longevity, making them ideal for demanding industrial applications.
| Standard | DIN, ASTM, BS and all International Standards |
| Specifications | ASTM A479 & ASME SA479 |
| UNS S32760 Nut and Bolts Size | M3 To M56 3/6″ to 2″ |
| Length | 3 to 200 MM |
| Super Duplex Steel 2207 Machine Screws Size | M1.6 To M12 |
| Duplex Steel 2205 Washers Size | M3 To M56 3/6″ to 2″ |
| Tensile Strength(MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) | Hardness Rockwell C (HR C) | |
| Super Duplex Steel Bolts | 760 | 550 | 15 | 32 Max |
| Phosphorus | Sulphur | Silicon | Carbon | Manganese | Nickel | Molybdenum | Nitrogen | Copper | Chromium |
|---|---|---|---|---|---|---|---|---|---|
| 0.035 % max | 0.02 % max | 0.80 % max | 0.03% Max | 1.20 % max | 6.00 – 8.00 % | 3.00 – 5.00 % | 0.24 – 0.32 % | 0.50 % max | 24.0 – 26.0 % |
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.
Super Duplex Steel washers are used for many high-performance applications. In chemical processing, they efficiently control the interaction with corrosive chemicals and high pressure. In marine environments, they do not corrode in sea water, hence, they provide long service to the equipment. In the oil and gas industry, they offer safe and effective sealing and spacing where stress is high. In addition, Super Duplex Steel washers are applied in power generation and construction industries due to their high performance in harsh conditions.
Super Duplex Steel Washers find extensive use in offshore platforms, subsea equipment, and marine engineering projects, where resistance to seawater is crucial. They are also essential in the chemical and petrochemical sectors, where they handle aggressive chemicals and corrosive conditions. In desalination plants and power generation facilities, these washers ensure reliable operation under high pressure and extreme temperatures. Furthermore, they are widely used in heavy construction, industrial machinery, and structural applications, providing stability, strength, and protection against wear, ensuring they deliver long-lasting fastening performance in critical projects.
Pengkumta Fasteners is a leading manufacturer and supplier of high-quality fasteners in Bangkok, Thailand, with over 8 years of experience serving global industries.
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