The most commonly used standard for duplex steel round bars is ASTM A479. It specifies the chemical composition, mechanical properties, and other relevant requirements for stainless steel bars and shapes for use in boilers and pressure vessels.
These grades are also known as F51/F60 or 2205 duplex stainless steel. They have a high chromium content (22%) and moderate nickel content (5%), which provides excellent corrosion resistance in various environments such as seawater, acidic solutions, and chloride-containing media.
This grade is also known as F53 or 2507 super duplex stainless steel. It has a higher chromium (25%) and molybdenum (4%) content than S31803/S32205, which enhances its resistance to pitting corrosion caused by chlorides and other halide ions.
This grade is also known as F55 or Zeron 100 super duplex stainless steel. It has a higher chromium (25%), molybdenum (3%), tungsten (1%), and copper (0.5%) content than S32750, which offers superior corrosion resistance in aggressive environments such as sulfuric acid solutions.
Each grade of duplex steel round bar has unique properties that make it suitable for specific applications.
Duplex steel round bars have excellent corrosion resistance due to their high chromium and molybdenum content. They can withstand pitting, crevice, and stress corrosion cracking in various environments.
Duplex steel round bars have higher strength than austenitic stainless steels due to their duplex microstructure. They exhibit good ductility and toughness even at low temperatures.
Duplex steel round bars are weldable using conventional welding methods such as gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW). However, care should be taken to avoid excessive heat input that may cause intermetallic phases and reduce the corrosion resistance.
The most common type of super duplex steel round bar is the standard super duplex round bar. This type of bar is made from a combination of austenitic and ferritic stainless steels, which gives it superior strength and corrosion resistance. It is commonly used in applications such as offshore oil rigs, chemical processing plants, and seawater desalination plants.
Super duplex S32750 round bars are a specific type of super duplex steel that contains high levels of both chromium and molybdenum. This gives them exceptional resistance to pitting and crevice corrosion, making them ideal for use in harsh environments where other materials may fail. They are often used in applications such as chemical processing plants, oil refineries, and offshore drilling rigs.
ASTM A276 super duplex S32750 round bars are manufactured according to strict industry standards set by the American Society for Testing and Materials (ASTM). These standards ensure that the bars meet specific requirements for composition, mechanical properties, and performance. This makes them a reliable and consistent choice for applications where quality and consistency are critical.
Stainless steel round bars are another popular type of super duplex steel round bar. They are made from a combination of chromium, nickel, and molybdenum, which gives them excellent strength, durability, and resistance to corrosion. They are often used in applications such as aerospace engineering, medical equipment manufacturing, and food processing.
Forged round bars are a type of super duplex steel round bar that is manufactured using a forging process. This process involves heating the metal to high temperatures and then shaping it using mechanical force. This results in a highly dense and uniform material with exceptional strength and durability. Forged round bars are often used in applications such as heavy machinery manufacturing, power generation, and construction.
UNS S32750 is a specific grade of super duplex steel that contains high levels of both chromium and molybdenum. It is highly resistant to pitting and crevice corrosion, making it ideal for use in harsh environments where other materials may fail. UNS S32750 round bars are often used in applications such as chemical processing plants, oil refineries, and offshore drilling rigs.