Super duplex stainless steel has a dual ferritic and austenitic structure that has iron, chromium, nickel and molybdenum in the alloy. The super duplex round bar possesses high tensile strength and resistance to pitting and stress corrosion at moderate temperatures. The material can be hard worked between 1875 and 2250 °F and then solution annealed at min 1925 °F. This is followed by air cooling or rapid water quenching to get round shaped ASTM A276 super duplex cold drawn bar.
The super duplex SS rounds are used for heat exchangers, and pressure vessels in different industries like oil & gas, chemical processing, etc. The super duplex material shows a great combination of high tensile and impact strengths. Their low coefficient of thermal expansion and high thermal conductivity make them ideal for mechanical and structural applications. Super duplex is magnetic and they do not require preheating unless condensation on cold metal is to be prevented.
The super duplex bar is used in applications where high strength, corrosion resistance and durability are required. They offer better physical and mechanical properties than standard austenitic steel and hence can be used for high temperature and pressure service. The super duplex bright bars are found in heat exchangers, condensers and pressure vessels of industries like oil & gas, desalination plants, pulp & paper, water treatment, etc. Super duplex can also resist chloride ion related stress corrosion cracking and hence used in the marine and shipbuilding industries.
Super duplex rod
Super duplex steel flat bar
Super duplex stainless steel square bar
The super duplex rod cost can vary from one supplier to the other based on their internal costing and market conditions. The price may also change with size & dimensions, customization like surface treatments, quantity ordered, additional requirements like testings and delivery location. You should always contact reputed super duplex product suppliers like Regent Steel & Engineering Co. to get the rods at competitive prices.
Generally, a super duplex material is more expensive than standard stainless steel grades. This is due to its alloy composition which has increased chromium, molybdenum and other pricey element content. Their manufacturing process, corrosion resistance & other mechanical properties and limited availability also increase the price.
|1/2 to 12 "||upto 12" or custom||Round, Hex, Square, Rectangular|
|ASTM A276 | ASME SA276||Super Duplex 2507 (UNS S32760/S32750 ) ||power, marine, pulp and paper|
ASTM A276 SDSS hex bar
Super duplex alloy rectangular bar
Super duplex bright bar
|Ultimate Tensile Strength, ksi||116 min.|
|Hardness Rockwell C||32 max.|
|0.1% Offset Yield Strength 0.2%, ksi||91 min.|
|Elongation in 2 inches, %||15 min.|
|0.2% Offset Yield Strength 0.2%, ksi||80 min.|
|Impact Energy, ft.-lbs.||74 min.|
The super duplex flat bar can be given different surface treatments to enhance its corrosion resistance and appearance. Some of the common finishes would include:
The super duplex steel square bar shows a good balance of hardness and toughness. High hardness indicates good resistance to wear and plastic deformation along with increased durability. But increased hardness can reduce the toughness which makes the super duplex stainless steel square bar brittle and prone to cracking under high impact. This also means that high toughness will reduce the hardness which will make the bar less suitable for abrasive applications.
Fabricating and welding SDSS hex bar needs some careful considerations to ensure material integrity and mechanical properties.
|Wt per Ft||Size in Inches||Wt per 12′|
|Flat bar – metric sizes and weights|
|Flat Size||Standard Length (metres)||KG’s per Metre||Colour Code|
|13 x 3||6.0||0.31||Blue|
|10 x 3||6.0||0.24||Blue|
|13 x 5||6.0||0.46||Orange|
|16 x 5||6.0||0.64||Orange|
|16 x 3||6.0||0.38||Blue|
|16 x 8||6.0||1.03||Red|
|20 x 5||6.0||0.81||Orange|
|20 x 3||6.0||0.48||Blue|
|20 x 6||6.0||0.97||White|
|25 x 3||6.0||0.60||Blue|
|20 x 10||6.0||1.61||Yellow|
|25 x 5||6.0||1.01||Orange|
|25 x 8||6.0||1.61||Red|
|25 x 6||6.0||1.21||White|
|25 x 10||6.0||2.01||Yellow|
|32 x 3||6.0||0.77||Blue|
|25 x 12||6.0||2.41||Pink|
|32 x 6||6.0||1.55||White|
|32 x 5||6.0||1.29||Orange|
|32 x 8||6.0||2.06||Red|
|32 x 12||6.0||3.09||Pink|
|40 x 3||6.0||0.97||Blue|
|32 x 10||6.0||2.58||Yellow|
|40 x 5||6.0||1.61||Orange|