Duplex Steel

Duplex steel optimally combines the strength derived from the ferritic phase and the corrosion resistance properties inherent in the austenitic phases. The various grades result from the introduction of alloying materials in different proportions. These duplex steel grades are assigned numerical identifiers for easy recognition, with the numbers reflecting the percentage composition of the major elements. There are three primary groups of duplex stainless steel: duplex, super duplex, and lean duplex, each encompassing different grades. Duplex steel, comprising chromium, molybdenum, and nickel, can be either hot rolled or cold drawn depending on the specific grades and intended applications. The grading of duplex stainless steel also denotes its pitting corrosion resistance, as indicated by the PREN number. Essentially, the PREN number serves as an identification of the chromium, molybdenum, and nickel percentages in the composition. The lean duplex exhibits the lowest PREN, offering less pitting corrosion resistance but remarkable strength, making it suitable for the construction industry. Conversely, the super duplex boasts the highest PREN numbers, providing exceptional pitting corrosion resistance and finding applications in the chemical industries. The standard duplex falls within a moderate range of PREN numbers, offering intermediate pitting corrosion resistance. Due to its cost-effectiveness and well-balanced properties, it is the most widely utilised duplex. Upon contact, we can furnish you with a duplex steel price list. The purchase amount and wholesale prices may vary based on the duplex steel application size, required forms, types, and shapes. As a prominent duplex steel supplier in India, we cater to a diverse range of duplex steel grades and specifications. The term “duplex” aptly describes the material, embodying dual characteristics derived from its austenitic and ferritic phases in metallurgy.