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Super Duplex Steel Nuts

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Super Duplex Steel Nuts Manufacturer and Supplier in Midland, UK

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Shelton Fasteners, based in Midland, UK, is a trusted manufacturer and supplier of high-quality fasteners, providing precision-engineered solutions across a range of industries. Their Super Duplex Steel Nuts are made from Grade 2507, a high-performance alloy combining austenitic and ferritic stainless steel. Available in shapes like hexagonal and square, these nuts offer exceptional resistance to corrosion, pitting, and stress corrosion cracking, making them ideal for demanding environments such as offshore and chemical industries.

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Super Duplex Steel Nuts are composed of approximately 50% austenitic and 50% ferritic phases, with key alloying elements like chromium (up to 25%), molybdenum (3-4%), and nitrogen, providing exceptional strength and corrosion resistance. Their mechanical properties include high tensile strength of 80-100 ksi and yield strength of 50-75 ksi. Physically, they have a density of 7.8 g/cm³ and exhibit excellent resistance to stress corrosion cracking, pitting, and crevice corrosion in harsh environments.

Super Duplex Steel Nuts Specifications

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″

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Super Duplex Steel Nuts Mechanical Properties

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

Super Duplex Steel Nuts Chemical Composition

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 %

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Super Duplex Steel Nuts are widely used in industries requiring high strength and corrosion resistance, such as offshore oil and gas, chemical processing, petrochemical, and marine applications. They are ideal for harsh environments due to their excellent resistance to stress corrosion cracking, pitting, and crevice corrosion. Commonly used in structural assemblies, pressure vessels, heat exchangers, and flanges, these nuts ensure reliability and durability in critical applications exposed to extreme conditions.

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Types of Super Duplex Steel Nuts

Super Duplex Nut
Super Duplex Stainless Steel Hex Bolt And Nut
Super Duplex UNS SAF Nuts
Super Duplex Steel Hex Bolt And Nut
Super Duplex Stainless Steel Heavy Hex Nuts
Super Duplex Stainless Steel Nuts

Super Duplex Steel Nuts are supplied with comprehensive test certificates, including material test reports (MTR), mechanical property certificates, and corrosion resistance test results, ensuring compliance with international standards like ASTM and ISO. These certificates provide full traceability and assurance of quality. The nuts are securely packaged to prevent damage during transit, with options for customized packaging. Timely and efficient delivery is ensured through trusted logistics partners, guaranteeing safe arrival at the destination.

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Aerospace Industry
Petrochemical Industry
Defence Industry

Super Duplex Steel Nuts Applications

  • Aerospace Industry
  • Defence Industry
  • Food & Beverage Industry
  • Manufacturing Industry
  • Petrochemical Industry
  • Oil & Gas Industry
  • Chemical Industry
  • Ship Building Industry
  • Marine Industry

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Shelton Fasteners is a leading manufacturer and supplier of high-quality fasteners in Midland, UK, with over 12 years of experience serving global industries.

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