Duplex vs Super duplex Fasteners

Duplex vs Super duplex Fasteners
3 mn read

Super Duplex fasteners are made of super duplex steel, a superior version of duplex steel. This material has higher nickel and molybdenum content than duplex stainless steel and offers better properties. The material is known to provide pitting and crevice corrosion resistance. Super Duplex 2507 grade is a top alloy for applications involving critical environments. Super duplex steel fasteners require chromium and nickel alloys for their manufacturing. These fasteners have high strength and temperature resistance. The material also consists of properties of ferritic and austenitic stainless steel. The fasteners are perfect in the industrial sector as they are strong, corrosion-resistant, and cost-effective. Moreover, these fasteners provide stress-cracking resistance and require a simple manufacturing process.

Features of Super Duplex 32750 fastener

  1. These fasteners are known to resist erosion under saltwater and freshwater conditions as the composition of this material helps resist corrosion.
  2. Super duplex steel has high strength, formability, and pliability.
  3. It has high strength and corrosion resistance.
  4. Super duplex fasteners do not pit at high temperatures of around 425 degrees Celsius.
  5. Super duplex steel fasteners have stress corrosion cracking and crevice corrosion resistance.
  6.  These fasteners have higher durability and deformability than chrome steel.
  7. These fasteners can resist impacts under extensive temperature ranges, abrasion, and erosion.
  8. Super duplex fasteners have excellent hardenability and low heat transfer rates.

Super Duplex vs Duplex Steel S32205 fasteners

Stainless steel is classified as duplex and super duplex stainless steel per their microstructure phases. Duplex stainless steel has microstructures like austenitic and ferritic stainless steel. Duplex steel has a combination of ferrite and austenite stainless steel. The crystalline structure has a balanced ratio (50:50) of austenite and ferrite. Another category of duplex steel is super duplex stainless steel. The super duplex stainless steel has a dual microstructure and fasteners made of super duplex steel have high pitting resistance, ranging between 22 and 45. This steel category has better corrosion resistance than its counterparts. Super Duplex 32750 fasteners and Super Duplex 32760 fasteners have better properties than Stainless Steel 304 or 316 fasteners. Super duplex stainless steel fasteners have high strength but they have low impact resistance due to their intermetallic phase. Hence, one must consult reputed stainless steel fastener suppliers who will help you understand your requirements and deliver quality products.

Super Duplex Fastener Applications

Super duplex fasteners have better properties than other stainless steel grades. The material is used for manufacturing fasteners like screws, bolts, nuts, threaded rods, stud bolts, washers, and custom fasteners. Super duplex fasteners are available in grades like S32550, S32760, and S32750. These fasteners find offshore and onshore gas and oil applications, especially in pipelines, as they are prone to corrosion due to the fluids flowing inside them. Super duplex steel does not break easily and is perfect for high-pressure applications, making it perfect in the commercial and residential sectors. Following are some of the top applications of super duplex fasteners:

  1.  Sea Water Desalination Plants
  2.  Power Plants
  3.  Marine Sector
  4.  Chemical Processing
  5.  Shipbuilding
  6.  Paper & Pulp Processing Sector
  7.  Petrochemical Industry
  8.  Oil and Gas Industry
  9.  Power Plants
  10.  Energy Generation
  11.  Pharmaceutical Sector
  12.  Food Processing
  13.  Aerospace Sector
  14.  Refineries

Final thoughts

Super duplex fasteners have exceptional properties, which makes them perfect for marine applications or applications involving corrosive environments. These fasteners are available in extensive designs, sizes, materials, and more. Fasteners & Fixtures LLP is a Fastener manufacturer offering quality products that undergo advanced manufacturing. The company utilizes high-grade raw material that undergoes extensive testing. Manufacturing of the stainless steel fasteners utilizes advanced technologies. The products also undergo rigorous testing to ensure their quality. Experts at Fasteners and Fixtures LLP guide customers to choose the perfect product for their project requirements.

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