Super Duplex Bolts and Fasteners Manufacturer

Here at Smith Bullough, we are pleased to offer our clients Super Duplex stainless steel bolts and fasteners with short production lead times.

What is Super Duplex stainless steel?

Much like its popular counterpart, Duplex stainless steel, Super Duplex stainless steel is a combined microstructure comprising a 50:50 ration of ferrite and austenite. The Duplex alloy already demonstrates a significant improvement over regular austenitic and ferritic steel grades. Super Duplex takes things further with an increased chromium and molybdenum content. This makes the resultant steel far more hard-wearing, with increased ductility and stress corrosion resistance.

Properties of Super Duplex stainless steel

Super Duplex stainless steel is available in several grades. Here at Smith Bullough, we use UNS 32750 and UNS 32760 Super Duplex in the manufacture of our bolts and fasteners.

Both variations offer greater corrosion resistance, compared to Duplex, as well as greater tensile strength and yield strength. Both offer good toughness and ductility, in addition to good resistance to stress corrosion cracking. They are both cost-effective materials for any company looking to reduce material costs without compromising on component quality.

UNS 32760 Super Duplex contains a slightly higher proportion of copper and tungsten, compared with UNS 32750. This gives the material an even greater resistance to inorganic acids, such as sulphuric and hydrochloric acid.

Types of Super Duplex bolts and fasteners

At Smith Bullough, we manufacture a wide variety of Super Duplex fasteners and bolts on site. Whatever your particular requirements might be, we will have the appropriate solution for you. These include:

  • nuts
  • washers
  • hexagon bolts and set screws
  • socket cap screws
  • socket set screws
  • socket countersunk screws
  • stud bolts

Industries that utilise Super Duplex bolts and fasteners

Because of its superb corrosion resistance, Super Duplex fasteners and bolts are used across a wide array of industries. It is particularly popular in those sectors that utilise large volumes and concentrations of both water and corrosive chemicals. As such, they are in regular use within the following industries:

  • marine construction
  • ship building
  • chemical plants
  • water desalination plants
  • pulp and paper processing plants
  • petrochemical and pollution control sectors
  • recycling centres

Applications of Super Duplex bolts and fasteners

Super Duplex fasteners and bolts from Smith Bullough are extremely versatile and have many useful applications. Here is just a few of the more common ones:

  • oil and gas components
  • hot water tanks
  • manifolds
  • heat exchangers
  • connectors
  • water heaters
  • pipework and flanges
  • compressor and pump components
  • pumps, valves, and chokes

For more information about our Super Duplex bolts and fasteners, or to discuss an order, contact Smith Bullough today. Call us on 01942 520 250 for a free, no-obligation quote.