It provides a valuablecombination of high strength, excellent corrosion resistance andstresscorrosion cracking. Duplex 2205 is ideally suited for highpressure and highly corrosive environments. Practical guidelines for the fabrication of duplex. Find the best of both worlds with duplex 2205 stainless steel. The 2205 grade steel is one of the most widely used ferritic and austenitic duplex stainless steel. Historically 317l, 6% molybdenum stainless steels depending on chlorine dioxide residual super duper 7% moly stainless steel, 654smo, for more corrosion resistance 2205 or 2507 and cast equivalents now have wide applicability substitute duplex solid plate or sheet lining for tile lined towers, chests or washers. Pdf advantages and limitations of 2205 and other duplex.
It combines high strength, ductility, and hardness. Because this duplex stainless steel is both ferritic and austenitic, it combines the top benefits of both alloys. Superduplex falls under the duplex stainless steel grouping. Lean duplex such as 2304, which contains no deliberate mo addition. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades. This microstructure ensures that 2205 is much more resistant to stress corrosion cracking than ss 304 or 316l. Fabrication of all stainless steels should be done only with tools dedicated to stainless steel materials.
Pdf advantages and limitations of 2205 and other duplex stainless steels for the transport of chemicals. Duplex stainless steels are neither fully austenitic like 304 stainless, nor fully ferritic, like 430 stainless. The nitrogen serves to significantly improve the corrosion. Sandvik saf 2205 is a member of the family of modern duplex stainless steels whose chemical composition is balanced in such a way that the reformation of austenite in the heataffected. Pdf microstructural development in 2205 duplex stainless steel. At low temperatures duplex stainless steels have better ductility than the ferritic and martensitic grades. Duplex 2205 is a typical composition of 22% chromium and 5% nickel. This combination allows the alloy to be stronger and tougher than standard austenitic steels. Ss2205 is a duplex stainless steel with a microstructure, when heat treated. As the name duplex implies, it has a dual phase microstructure of both austenite and ferrite. The use of 2205 duplex stainlesssteel for pharmaceutical imoa.
They are not quite as easily welded as the austenitic grades but low thermal expansion in duplex. Common trade names 2205 stainless, 2205 stainless steel. Issf duplex stainless steels 5 2 standards and chemical compositions applicable standards duplex stainless steel grades are covered by major standards, such as en, iso, astm for a number of products andor applications see appendix 1. The alloy is chemically balanced to yield a microstructureof approximately 50.
Ugitechs 2205 is a high strength, highly corrosion resistant duplex stainless steel with a 22% cr, 5% ni and 3% mo composition available as uns s31803 or the dual certified uns s31803s32205. The high chromium, molybdenum and nitrogen contents provide corrosion resistance superior to 316. The duplex family covers a broad range of corrosion resistance, allowing the substitution of standard stainless grades from 304 with lean duplex ur 2202, 904l with ur 2205, up to 6mo with ur 2507 super duplex. Download the duplex stainless plate pdf file pdf sandmeyer steel company has an extensive inventory of duplex ldx 2101, 2304, 2205 and 2507 stainless steel plate and plate products available to satisfy your challenging corrosion and high strength requirements. Duplex grades penn stainless stainless steel plate, sheet. Silverstein and others published hydrogen behavior in saf 2205 duplex stainless steel find, read and cite all the research you need on researchgate. It offers outstanding resistance to the chloride ion stress cracking at temperature ranges to 150oc. Pdf in this study, the effect of isothermal aging at 700c on the microstructural changes in 2205 duplex stainless steel has been investigated. Compared to similar duplex stainless alloys such as 2205, ak steel nitronic 19d stainless steel is more economical but less corrosion resistant due to lower alloy. Composition typical wt % astm a240 wt % carbon c 0.
The cpt of duplex stainless steel 2205 alloy is minimum 35oc. The standard of this grade of steel has been refined over the years creating a versatile and strong product. Ss2205 is a duplex stainless steel with a microstructure, when heat treated properly, of nearly equal proportions of austenite and ferrite. The recommended filler material for 2205 stainless steel is 2209. Duplex stainless steels like 2205 also maintain good weldability in their thickest sections, and they are much more resistant to stress. Oct 19, 2001 2205 is the most widely used duplex ferriticaustenitic stainless steel grade. Sandvik saf 2205 is a member of the family of modern duplex stainless steels whose chemical composition is balanced in such a way that the reformation of austenite in the heataffected zone, adjacent to the weld, takes place quickly. The ati 2205 alloy is the most widely used of the duplex stainless steels and is often used in the form of welded pipe or tubular components. Penn stainless inventory now includes duplex 2205 uns s32205 s31803, in sheet, sheet coil, plate, plate coil, round bar, processed flat bar and tubular products. As a result, duplex stainless steels display properties characteristic of both austenitic and ferritic stainless steels.
Ati 2205alloy uns s31803 andor s32205 is a nitrogenenhanced duplex stainless steel alloy. The main difference between dual certified s32205 and s31830 is the increased corrosion resistance of the s32205 due to the tighter chemistry. It is the most widely used duplex stainless steel grade and is. Its most important properties are excellent corrosion resistance and high strength. Alloy 2205 is a 22% cr duplex stainless steel, supplied in the solution annealed condition. Duplex stainless steel bar 2205 atlas 2205 atlas steels. Applications include chemical processing, oil and gas exploration, marine and other high chloride environments, and paper digestors. It finds applications due to both excellent corrosion resistance and high strength.
The high chromium, molybdenum and nitrogen contents results in a pitting resistance equivalent number pren of 3334. Pdf hydrogen behavior in saf 2205 duplex stainless steel. Lean duplex ss lower nickel and no molybdenum 2101, 2102, 2202, 2304. The high chromium, molybdenum and nitrogen contents provide. The original s31803 composition has over the years been refined by many steel suppliers, and the resulting restricted. Issf duplex stainless steels 5 2 standards and chemical compositions applicable standards duplex stainless steel grades are covered by major standards, such as en, iso, astm for a number of. Applications of duplex stainless steel duplex 2205 stainless steel tubeside and 304 ss shellside preheaters high pressure shell and tube heat exchanger titan gained its reputation in the precision. The global leader in specialty metals 2205 duplex stainless steel. Ati 2205 alloy is metallographically examined to ensure that the asshipped product is essentially free from the presence of detrimental precipitate phases such as sigma. Super duplex stainless steels article pdf available in materials science and technology 88. Duplex 2205 is a twophase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. Duplex stainless steel manual valve in the oil and gas production process.
At 4,500 tonnes, it is the largest single order of duplex stainless steel in china to date. Applications of duplex stainless steel titan fabricators. Sandvik saf 2304 is a lean duplex stainless steel containing no molybdenum and a low nickel content. Historically 317l, 6% molybdenum stainless steels depending on chlorine dioxide residual super duper 7% moly stainless steel, 654smo, for more corrosion resistance 2205 or 2507 and cast. The duplex family covers a broad range of corrosion resistance, allowing the substitution of standard stainless grades from 304 with lean duplex ur 2202, 904l with ur 2205, up to 6mo with ur. Compared to similar duplex stainless alloys such as 2205, ak steel nitronic 19d stainless steel is more economical but less corrosion resistant due to lower alloy content, particularly molybdenum. Applications of duplex stainless steel duplex 2205 stainless steel tubeside and 304 ss shellside preheaters high pressure shell and tube heat exchanger titan gained its reputation in the precision welding of complex and difficult to handle corrosionresistant alloys. Today, modern duplex stainless steel can be divided into four groups. Duplex stainless steels are extremely corrosion resistant, work hardenable alloys. For jobs that require reliable steel strength and good corrosion resistance, duplex 2205 stainless steel is the key. Alloy 2205, when heat treated properly, has a microstructure that has nearly equal proportions of austenite and ferrite phases. Duplex grades can readily be used down to at least 50c. Duplex stainless steel plate contains relatively high levels of chromium between 18% and 28% and low to moderate. Type 2205 code plus two duplex stainless steel 3 precipitate between 8001500f 425815c, and 885 425c embrittlement can occur in the temperature range of 650950f 340510c.
Duplex stainless steel 2205 alloy offers extensive resistance to the local corrosion factors like intergranular, pitting and crevice corrosion. The cpt of duplex stainless steel 2205 alloy is minimum. It finds applications due to both excellent corrosion. It still accounts for over 70% of present duplex deliveries. What is the family lean duplex ss lower nickel and no molybdenum 2101, 2102, 2202, 2304 duplex ss higher nickel and molybdenum 2205, 2003, 2404 super duplex 25chromium and. Duplex grades penn stainless stainless steel plate. Tooling and work surfaces must be thoroughly cleaned before. Product bulletin high alloy stainless steels september. It is produced by most stainless steel producers because it is not protected by any patents.
Although there is a fairly long list of uns grades, only a few of them make the largest part. Practical guidelines for the fabrication of duplex stainless. Uns s31803 alloy is probably the most recognized and widely used of the many duplex stainless steels. Duplex stainless steels are graded for their corrosion performance depending on their alloy content. Duplex 2205 bolts are made from an austeniticferritic stainless steel, which was designed to deliver higher strength and corrosion resistance than 300 series stainless steels. As a duplex stainless steel, it combines the desirable aspect of properties of both austenitic and ferritic grades. Their microstructures consist of a mixture of austenite and ferrite phases. Ss 2205 is a duplex stainless steel with a microstructure of nearly equal proportions of austenite and ferrite, when properly heat treated. Duplex ss higher nickel and molybdenum 2205, 2003, 2404. If 2205 is held for sufficiently long times in any of these temperature ranges, precipitation reactions will occur. Duplex stainless steel 1 outokumpu en uns iso ldx 2101 1. How to weld type 2205 code plus two duplex stainless steel. It is a high strength, low cost alternative to standard austenitic grades such as astm 304l and 316l.
1159 759 815 1074 710 1256 530 192 979 278 182 1498 1405 1344 341 628 121 932 1072 1399 1489 755 47 1182 787 1601 213 405 132 310 1078 969 333