Stainless duplex steel, or simply, duplex steel is a type of metal made from the combination of ferritic and austenitic stainless steel grains. It contains a microstructure with two phases, one being the austenitic phase or mode (which has the micromolecular structure of nickel and chromium ), and the other being the ferritic phase or mode (having the micromolecular structure of pure chromium). nitrogen and molybdenum molecules are also added for improved metal strength.
These components give the duplex steel a number of significant advantages over other kinds of stainless steel, mainly the regular austenitic and ferritic stainless steel forms.
This kind of metal's first and most obvious advantage over other metals of its kind is the fact that it is considerably stronger, even two times as strong as standard austenitic or ferritic metals. And it is all thanks to its unique molecular structure and added nitrogen content.
Duplex steel's resistance to cracking and tensile stress is also a main strength, with it being significantly more ductile that ferritic grade stainless steel. Though, it still has a bit of a disadvantage when contrasted against the superior ductility of austenitic stainless steel.
This particular type of steel is mostly utilized marine services and pipings due to another important attribute, and this is its high corrosion resistance, also known as ability to withstand the corrosive effects of the various elements within a marine environment.
This metal's resistance against stress corrosion can be attributed to its ferritic components, and unique two-phase structure, with high molybdenum and chromium content. While its excellent performance against pitting corrosion is a trait borrowed from the combined strengths of nitrogen, chromium, and molybdenum.
Duplex steel is produced in varying grades and different alloy compositions depending on the required levels of anti-corrosive components. Some examples of the grades are; super duplex steel, hyper duplex, standard duplex, and lean duplex steel.
From transport and passenger ships, to various piping systems, to the assembly of a luxury yacht, as well as in offshore oil rigs, this type of steel plays a vital role in all of them.
These components give the duplex steel a number of significant advantages over other kinds of stainless steel, mainly the regular austenitic and ferritic stainless steel forms.
This kind of metal's first and most obvious advantage over other metals of its kind is the fact that it is considerably stronger, even two times as strong as standard austenitic or ferritic metals. And it is all thanks to its unique molecular structure and added nitrogen content.
Duplex steel's resistance to cracking and tensile stress is also a main strength, with it being significantly more ductile that ferritic grade stainless steel. Though, it still has a bit of a disadvantage when contrasted against the superior ductility of austenitic stainless steel.
This particular type of steel is mostly utilized marine services and pipings due to another important attribute, and this is its high corrosion resistance, also known as ability to withstand the corrosive effects of the various elements within a marine environment.
This metal's resistance against stress corrosion can be attributed to its ferritic components, and unique two-phase structure, with high molybdenum and chromium content. While its excellent performance against pitting corrosion is a trait borrowed from the combined strengths of nitrogen, chromium, and molybdenum.
Duplex steel is produced in varying grades and different alloy compositions depending on the required levels of anti-corrosive components. Some examples of the grades are; super duplex steel, hyper duplex, standard duplex, and lean duplex steel.
From transport and passenger ships, to various piping systems, to the assembly of a luxury yacht, as well as in offshore oil rigs, this type of steel plays a vital role in all of them.
