Duplex stainless steel

Duplex Stainless Steel Duplex stainless steels are Fe-Ni-Cr alloys consisting of ferritic-austenitic microstructure at room temperature. From: Novel Materials Processing by Advanced Electromagnetic Energy Sources, 2005 Related terms: • Corrosion • Austenitic Stainless Steel • Austenite • Chromium • Stress Corrosion Cracking • Corrosion Resistance • Microstructure • Stainless Steel T. Kuroda, ... Y. Kitagawa, in Novel Materials Processing by Advanced Electromagnetic Energy Sources, 2005 1.INTRODUCTION Duplex stainless steels are Fe-Ni-Cr alloys consisting of ferritic-austenitic microstructure at room temperature. These steels generally possess beneficial combinations of the austenitic and ferritic phases. Duplex stainless steels exhibit greater toughness and better weldability than ferritic stainless steel ( Nilsson, 1992). They have higher strength and better corrosion resistance than austenitic stainless steel ( Atamert and King, 1992). Their good engineering performance has led to an increasing number of applications, mainly in corrosive environments such as sour gas pipelines and chemical reaction vessels. When welding duplex stainless steels, the microstructure and the properties of weld metals are generally controlled with some success by adjusting the filler material composition. However, the microstructure of the heat-affected zone (HAZ) is determined only by applied thermal cycles and is very sensitive to welding conditions ( Charles, 1995). The HAZ generally devel...

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Penn Stainless inventory now includes Duplex 2507, which is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel. This alloy is designed for applications which require exceptional strength and corrosion resistance; examples include applications in chemical processing, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity and a low coefficient of thermal expansion. The high chromium, molybdenum, and nickel levels provide excellent resistance to pitting, crevice, and general corrosion. General Properties Duplex 2507 (UNS S32750) is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion. The high chromium, molybdenum, and nickel levels provide excellent resistance to pitting, crevice, and general corrosion. Applications • Oil and gas industry equipment • Offshore platforms, heat exchangers, process and service water systems, fire-fighting systems, injection and ballast water systems • Chemical process industries, heat exchangers, vessels, and piping • Desalination plants, high pressure RO-plant and seawater piping • Mechanical and structural c...

Duplex stainless steels are usually divided into three groups based on their pitting corrosion resistance, characterised by the pitting resistance equivalence number, PREN = %Cr + 3.3 %Mo + 16 %N. Standard duplex (PREN range: 28–38) Typically Grade EN 1.4462 (also called 2205). It is typical of the mid-range of properties and is perhaps the most used today Super-duplex (PREN range: 38-45) Typically grade EN 1.4410 up to so-called hyper duplex grades (PREN: >45) developed later to meet specific demands of the oil and gas as well as those of the chemical industries. They offer a superior corrosion resistance and strength but are more difficult to process because the higher contents of Lean duplex grades (PREN range: 22–27) Typically grade EN 1.4362, have been developed more recently for less demanding applications, particularly in the building and construction industry. Their corrosion resistance is closer to that of the standard austenitic grade EN 1.4401 (with a plus on resistance to stress corrosion cracking) and their mechanical properties are higher. This can be a great advantage when strength is important. This is the case in bridges, pressure vessels or tie bars. Chemical compositions [ ] Chemicals composition of grades from EN 10088-1 (2014) Standard are given in the table below: Composition by weight (%) ISO Steel designation EN Number UNS equiv C, max. Si Mn P, max. S, max. N Cr Cu Mo Ni Other X2CrNiN22-2 1.4062 S32202 0.03 ≤1.00 ≤2.00 0.04 0.010 0.16 to 0.28 21.5 ...

Penn Stainless inventory now includes Duplex 2507, which is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel. This alloy is designed for applications which require exceptional strength and corrosion resistance; examples include applications in chemical processing, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity and a low coefficient of thermal expansion. The high chromium, molybdenum, and nickel levels provide excellent resistance to pitting, crevice, and general corrosion. General Properties Duplex 2507 (UNS S32750) is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion. The high chromium, molybdenum, and nickel levels provide excellent resistance to pitting, crevice, and general corrosion. Applications • Oil and gas industry equipment • Offshore platforms, heat exchangers, process and service water systems, fire-fighting systems, injection and ballast water systems • Chemical process industries, heat exchangers, vessels, and piping • Desalination plants, high pressure RO-plant and seawater piping • Mechanical and structural c...

Duplex stainless steels are usually divided into three groups based on their pitting corrosion resistance, characterised by the pitting resistance equivalence number, PREN = %Cr + 3.3 %Mo + 16 %N. Standard duplex (PREN range: 28–38) Typically Grade EN 1.4462 (also called 2205). It is typical of the mid-range of properties and is perhaps the most used today Super-duplex (PREN range: 38-45) Typically grade EN 1.4410 up to so-called hyper duplex grades (PREN: >45) developed later to meet specific demands of the oil and gas as well as those of the chemical industries. They offer a superior corrosion resistance and strength but are more difficult to process because the higher contents of Lean duplex grades (PREN range: 22–27) Typically grade EN 1.4362, have been developed more recently for less demanding applications, particularly in the building and construction industry. Their corrosion resistance is closer to that of the standard austenitic grade EN 1.4401 (with a plus on resistance to stress corrosion cracking) and their mechanical properties are higher. This can be a great advantage when strength is important. This is the case in bridges, pressure vessels or tie bars. Chemical compositions [ ] Chemicals composition of grades from EN 10088-1 (2014) Standard are given in the table below: Composition by weight (%) ISO Steel designation EN Number UNS equiv C, max. Si Mn P, max. S, max. N Cr Cu Mo Ni Other X2CrNiN22-2 1.4062 S32202 0.03 ≤1.00 ≤2.00 0.04 0.010 0.16 to 0.28 21.5 ...

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Duplex Stainless Steel Duplex stainless steels are Fe-Ni-Cr alloys consisting of ferritic-austenitic microstructure at room temperature. From: Novel Materials Processing by Advanced Electromagnetic Energy Sources, 2005 Related terms: • Corrosion • Austenitic Stainless Steel • Austenite • Chromium • Stress Corrosion Cracking • Corrosion Resistance • Microstructure • Stainless Steel T. Kuroda, ... Y. Kitagawa, in Novel Materials Processing by Advanced Electromagnetic Energy Sources, 2005 1.INTRODUCTION Duplex stainless steels are Fe-Ni-Cr alloys consisting of ferritic-austenitic microstructure at room temperature. These steels generally possess beneficial combinations of the austenitic and ferritic phases. Duplex stainless steels exhibit greater toughness and better weldability than ferritic stainless steel ( Nilsson, 1992). They have higher strength and better corrosion resistance than austenitic stainless steel ( Atamert and King, 1992). Their good engineering performance has led to an increasing number of applications, mainly in corrosive environments such as sour gas pipelines and chemical reaction vessels. When welding duplex stainless steels, the microstructure and the properties of weld metals are generally controlled with some success by adjusting the filler material composition. However, the microstructure of the heat-affected zone (HAZ) is determined only by applied thermal cycles and is very sensitive to welding conditions ( Charles, 1995). The HAZ generally devel...

Duplex stainless steels are usually divided into three groups based on their pitting corrosion resistance, characterised by the pitting resistance equivalence number, PREN = %Cr + 3.3 %Mo + 16 %N. Standard duplex (PREN range: 28–38) Typically Grade EN 1.4462 (also called 2205). It is typical of the mid-range of properties and is perhaps the most used today Super-duplex (PREN range: 38-45) Typically grade EN 1.4410 up to so-called hyper duplex grades (PREN: >45) developed later to meet specific demands of the oil and gas as well as those of the chemical industries. They offer a superior corrosion resistance and strength but are more difficult to process because the higher contents of Lean duplex grades (PREN range: 22–27) Typically grade EN 1.4362, have been developed more recently for less demanding applications, particularly in the building and construction industry. Their corrosion resistance is closer to that of the standard austenitic grade EN 1.4401 (with a plus on resistance to stress corrosion cracking) and their mechanical properties are higher. This can be a great advantage when strength is important. This is the case in bridges, pressure vessels or tie bars. Chemical compositions [ ] Chemicals composition of grades from EN 10088-1 (2014) Standard are given in the table below: Composition by weight (%) ISO Steel designation EN Number UNS equiv C, max. Si Mn P, max. S, max. N Cr Cu Mo Ni Other X2CrNiN22-2 1.4062 S32202 0.03 ≤1.00 ≤2.00 0.04 0.010 0.16 to 0.28 21.5 ...

Duplex Stainless Steel Duplex stainless steels are Fe-Ni-Cr alloys consisting of ferritic-austenitic microstructure at room temperature. From: Novel Materials Processing by Advanced Electromagnetic Energy Sources, 2005 Related terms: • Corrosion • Austenitic Stainless Steel • Austenite • Chromium • Stress Corrosion Cracking • Corrosion Resistance • Microstructure • Stainless Steel T. Kuroda, ... Y. Kitagawa, in Novel Materials Processing by Advanced Electromagnetic Energy Sources, 2005 1.INTRODUCTION Duplex stainless steels are Fe-Ni-Cr alloys consisting of ferritic-austenitic microstructure at room temperature. These steels generally possess beneficial combinations of the austenitic and ferritic phases. Duplex stainless steels exhibit greater toughness and better weldability than ferritic stainless steel ( Nilsson, 1992). They have higher strength and better corrosion resistance than austenitic stainless steel ( Atamert and King, 1992). Their good engineering performance has led to an increasing number of applications, mainly in corrosive environments such as sour gas pipelines and chemical reaction vessels. When welding duplex stainless steels, the microstructure and the properties of weld metals are generally controlled with some success by adjusting the filler material composition. However, the microstructure of the heat-affected zone (HAZ) is determined only by applied thermal cycles and is very sensitive to welding conditions ( Charles, 1995). The HAZ generally devel...