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The Fasteners Mart, Mumbai, India, is a renowned supplier of high-grade industrial fasteners reliable for quality, accuracy, and endurance. Among their top products is the Super Duplex Steel Washers (Grade S32750), which is made of high-strength super duplex stainless steel. These washers are produced in several shapes including flat, spring, and custom profiles to serve various load-carrying and sealing applications. Famous for their excellent corrosion resistance, high strength, and long service life, these washers find application in aggressive environments, particularly in marine, offshore, and chemical processing sectors.
Super Duplex Steel Washers S32750 are produced using an alloy of about 25% chromium, 7% nickel, 4% molybdenum, 0.3% nitrogen, and balance iron with excellent corrosion resistance. They possess a tensile strength of about 800–1000 MPa and yield strength of more than 550 MPa, which is twice the strength of normal austenitic stainless steels. Having a density of 7.8 g/cm³, and a melting range of 1350–1400°C, these washers possess high pitting and crevice corrosion resistance, fatigue strength, and good impact toughness even at sub-zero temperatures.
| 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 S32750 find application where utmost strength and corrosion resistance is necessary, i.e., in offshore oil rigs, subsea equipment, and marine hardware. They are used extensively in the chemical and petrochemical industry to be installed in heat exchangers, pressure vessels, and pipelines. Due to their toughness and resistance against chloride stress corrosion, they find application in power generation plants and desalination plants as well. They provide safe fastening in corrosive and high-pressure conditions in structural applications and last long while ensuring integrity and performance over time even in harsh environments.
The Fasteners Mart provides prompt and safe delivery of Super Duplex Steel Washers S32750 to domestic and overseas markets. Every washer is wrapped with moisture-proof packaging material, bubble wrap, and heavy-duty export-quality cartons or wooden boxes. Custom marking, bulk packaging, and specific shipping arrangements are options available for meeting individual client and project demands.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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