{"id":4099,"date":"2025-06-20T17:18:16","date_gmt":"2025-06-20T14:18:16","guid":{"rendered":"https:\/\/www.defencemetal.com\/?p=4099"},"modified":"2026-09-17T23:07:54","modified_gmt":"2026-09-17T20:07:54","slug":"aisi-f53-1-4410-uns-s32750-super-duplex-stainless-steel","status":"publish","type":"post","link":"https:\/\/www.defencemetal.com\/index.php\/2025\/06\/20\/aisi-f53-1-4410-uns-s32750-super-duplex-stainless-steel\/","title":{"rendered":"AISI F53 (1.4410 \/ UNS S32750) \u2014 Super Duplex Stainless Steel"},"content":{"rendered":"<p><!-- dm-urun-link --><\/p>\n<div style=\"border:1px solid #d7dfe4;border-left:3px solid #DD3333;background:#F7FAFB;padding:11px 15px;margin:0 0 20px;font-size:14px;line-height:1.55\"><strong style=\"color:#12303f\">We supply AISI F53.<\/strong> For dimensions, standard equivalents, stock and quotations, take a look at the <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-f53\/\"><strong>AISI F53 product page<\/strong><\/a>.<\/div>\n<p><!-- \/dm-urun-link --><\/p>\n<h3><b>AISI F53<\/b><\/h3>\n<h3><b>AISI F53 (UNS S32750) Super Duplex Stainless Steel: A High Performance Alloy Designed for Extremely Demanding Environments<\/b><\/h3>\n<p class=\"p3\">AISI F53 is a stainless steel grade of superior quality, known in industrial terms as <span class=\"s2\"><b><a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/super-duplex-steels\/\">Super Duplex Stainless<\/a> Steel<\/b><\/span>, offering high strength and extraordinary corrosion resistance together. Also coded as <span class=\"s2\"><b>UNS S32750<\/b><\/span>, this alloy has been developed specifically for systems operating under extremely aggressive conditions, such as petrochemicals, sea water treatment, energy, subsea piping and the nuclear industry.<\/p>\n<p class=\"p3\">Thanks to the balanced distribution of approximately 50% <a href=\"https:\/\/en.wikipedia.org\/wiki\/Ferrit\">ferrite<\/a> and 50% austenite phases in its microstructure, AISI F53 provides both high strength and high resistance to cracking and pitting corrosion. In this article the technical properties of AISI F53, its application areas, its compliance with norms and important points that will contribute to the purchasing process are addressed comprehensively.<\/p>\n<hr>\n<h3><b>AISI F53 Chemical Composition and Microstructure<\/b><\/h3>\n<p class=\"p3\">The chemical composition of AISI F53 has been designed specifically to provide an optimum balance between mechanical strength, corrosion resistance and weldability. Thanks in particular to its high <span class=\"s2\"><b>chromium (Cr)<\/b><\/span>, <span class=\"s2\"><b>molybdenum (Mo)<\/b><\/span> and <span class=\"s2\"><b>nitrogen (N)<\/b><\/span> content, it offers high resistance to both general and localised corrosion.<\/p>\n<p class=\"p4\"><b>Typical Chemical Composition (% by weight):<\/b><b><\/b><\/p>\n<ul>\n<li class=\"p1\"><span class=\"s1\"><b>Chromium (Cr):<\/b><\/span> 24.0 \u2013 26.0<\/li>\n<li class=\"p1\"><b>Nickel (Ni):<\/b><span class=\"s1\"> 6.0 \u2013 8.0<\/span><\/li>\n<li class=\"p1\"><b>Molybdenum (Mo):<\/b><span class=\"s1\"> 3.0 \u2013 5.0<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Nitrogen (N):<\/b><\/span> 0.24 \u2013 0.35<\/li>\n<li class=\"p1\"><b>Manganese (Mn):<\/b><span class=\"s1\"> Max. 1.2<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Carbon (C):<\/b><\/span> Max. 0.030<\/li>\n<li class=\"p1\"><b>Silicon (Si):<\/b><span class=\"s1\"> Max. 0.8<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Iron (Fe):<\/b><\/span> Balance<\/li>\n<\/ul>\n<p class=\"p4\"><span class=\"s3\">This special composition makes the material resistant in the face of demanding mechanisms such as <\/span><b>pitting corrosion<\/b><span class=\"s3\">, <\/span><b>stress corrosion cracking (SCC)<\/b><span class=\"s3\"> and <\/span><b>intergranular corrosion<\/b><span class=\"s3\">.<\/span><\/p>\n<hr>\n<h3><b>AISI F53 Mechanical Properties and Thermal Behaviour<\/b><\/h3>\n<p class=\"p3\">Thanks to its dual phase structure, AISI F53 provides both high tensile strength and impact strength. Thanks to its structure being stable at high temperature, it is a suitable solution for many highly stressed applications.<\/p>\n<p class=\"p4\"><b>Typical mechanical values:<\/b><b><\/b><\/p>\n<ul>\n<li class=\"p1\"><b>Tensile Strength (UTS):<\/b><span class=\"s1\"> \u2265 800 MPa<\/span><\/li>\n<li class=\"p1\"><b>Yield Strength (0.2%):<\/b><span class=\"s1\"> \u2265 550 MPa<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Hardness:<\/b><\/span> Max. 28 HRC<\/li>\n<li class=\"p1\"><b>Elongation (%):<\/b><span class=\"s1\"> \u2265 25<\/span><\/li>\n<li class=\"p1\"><b>Notch Impact Strength (Charpy, -46\u00b0C):<\/b><span class=\"s1\"> \u2265 100 J<\/span><\/li>\n<\/ul>\n<p class=\"p3\">According to these values, AISI F53 offers approximately <span class=\"s2\"><b>2 times more strength<\/b><\/span> and superior corrosion resistance than alloys such as conventional austenitic 316L or duplex 2205.<\/p>\n<p class=\"p3\"><span class=\"s2\"><b>Heat treatment:<\/b><\/span> AISI F53 cannot be hardened by heat; however, the annealing operation is carried out between 1040\u20131120 \u00b0C and it is essential to preserve the ferrite\/austenite balance by rapid cooling. Slow cooling or long holding at temperature may lead to the formation of the harmful sigma phase.<\/p>\n<hr>\n<h3><b>Compliance with ASTM, EN and Other Standards<\/b><\/h3>\n<p class=\"p3\">AISI F53 (UNS S32750) is produced in compliance with many international standards. This provides easy verification and quality assurance in both local and international supply chains.<\/p>\n<p class=\"p4\"><b>ASTM Standards:<\/b><b><\/b><\/p>\n<ul>\n<li class=\"p1\"><span class=\"s1\"><b>ASTM A182<\/b><\/span> \u2013 Forged flanges, fittings<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>ASTM A240<\/b><\/span> \u2013 Products in plate, sheet and strip form<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>ASTM A479<\/b><\/span> \u2013 Stainless bars for pressurised systems<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>ASTM A789 \/ A790<\/b><\/span> \u2013 Welded \/ seamless pipes<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>ASTM A276<\/b><\/span> \u2013 General industrial bars<\/li>\n<\/ul>\n<p class=\"p4\"><b>EN and ISO Equivalents:<\/b><b><\/b><\/p>\n<ul>\n<li class=\"p1\"><b>EN 1.4410 \/ X2CrNiMoN25-7-4<\/b><\/li>\n<li class=\"p1\"><b><\/b><span class=\"s1\"><b>ISO 15156 (NACE MR0175)<\/b><\/span> \u2013 Suitability for use in sour oil and gas environments<\/li>\n<\/ul>\n<p class=\"p3\">Referring to these standards during the purchasing process \u2014 for example expressions such as &#8220;ASTM A790 S32750 seamless pipe&#8221; or &#8220;1.4410 certified forged flange&#8221; \u2014 provides great convenience in sourcing the correct product.<\/p>\n<hr>\n<h3><b>Application Areas<\/b><\/h3>\n<p class=\"p3\">AISI F53 is preferred particularly in environments involving <span class=\"s2\"><b>high corrosion, high pressure and high temperature<\/b><\/span>.<\/p>\n<ul>\n<li class=\"p4\"><b>Oil and Natural Gas Industry: <\/b>Sulphurous environments, gases containing H\u2082S, high pressure pipelines and subsea equipment are the most widespread areas of use of F53. In environments of this kind the risk of SCC and sulphide cracking is high; AISI F53 provides the strength to absorb these effects.<\/li>\n<li class=\"p4\"><b>Marine and Salt Water Systems: <\/b>Localised attacks such as the pitting corrosion caused by sea water can advance rapidly in austenitic steels such as 316L or 904L. Thanks to its high PREN value (&gt; 40), F53 offers top level protection against marine environments.<\/li>\n<li class=\"p4\"><b>Chemical Process Equipment: <\/b>It provides long-life performance in reactor tanks, exchanger tubes and filter systems working with acids, alkalis and oxidising substances.<\/li>\n<li class=\"p4\"><b>Paper and Pulp Industry: <\/b>Environments containing chlorine-based chemicals at high temperature are points where super duplex steels are preferred.<\/li>\n<li class=\"p4\"><b>Renewable Energy and Nuclear Sector: <\/b>It is used because of its high strength in heat exchangers, pipelines and support structures where salt water is used. It is also preferred in nuclear power plants thanks to its resistance to thermal expansion.<\/li>\n<\/ul>\n<hr>\n<h3><b>Advantages and Disadvantages<\/b><\/h3>\n<p class=\"p4\"><b>Advantages:<\/b><b><\/b><\/p>\n<ul>\n<li>Very high corrosion resistance (especially pitting and SCC)<\/li>\n<li>2 times higher strength than 300 series austenitic steels<\/li>\n<li>Low maintenance requirement and long service life<\/li>\n<li>Dimensional stability under high pressure and temperature<\/li>\n<li>Weldability (with careful processing)<\/li>\n<\/ul>\n<p class=\"p4\"><b>Disadvantages:<\/b><b><\/b><\/p>\n<ul>\n<li class=\"p1\">Ductility may decrease at low temperatures<\/li>\n<li class=\"p1\">Machinability is restricted in complex shaped parts<\/li>\n<li class=\"p1\">Its cost is high because of the high alloy contents<\/li>\n<li class=\"p1\">Careful heat treatment is required against the risk of sigma phase formation<\/li>\n<li class=\"p1\">Solution annealing after welding may be mandatory<\/li>\n<\/ul>\n<p class=\"p3\">In this respect AISI F53 can rapidly lose its mechanical properties under unsuitable design and processing conditions. For this reason, following the appropriate procedures is indispensable in projects requiring welded joints or complex forming.<\/p>\n<hr>\n<h3><b>Notes for the Purchasing Process<\/b><\/h3>\n<p class=\"p3\">AISI F53 (UNS S32750) products are generally supplied in the following forms:<\/p>\n<ul>\n<li class=\"p1\">Seamless or welded pipe (pipe &amp; tube)<\/li>\n<li class=\"p1\">Flanges (forged flanges)<\/li>\n<li class=\"p1\">Sheet and plate (plate, sheet)<\/li>\n<li class=\"p1\">Bar and shaft (bar, shaft)<\/li>\n<li class=\"p1\">Forged parts (forged fittings)<\/li>\n<\/ul>\n<p class=\"p3\">The following elements should be checked during the purchasing process:<\/p>\n<ul>\n<li class=\"p1\">EN 10204 3.1 or 3.2 certificate<\/li>\n<li class=\"p1\">Compliance with the ASTM\/EN standard<\/li>\n<li class=\"p1\">PREN value (&gt; 40)<\/li>\n<li class=\"p1\">Heat treatment history and weldability reports<\/li>\n<li class=\"p1\">The supplier&#8217;s offshore compliance certificates such as NORSOK MDS<\/li>\n<\/ul>\n<hr>\n<h3><b>Conclusion<\/b><\/h3>\n<p class=\"p3\">AISI F53 (UNS S32750) is an alloy able to provide <span class=\"s2\"><b>high mechanical strength<\/b><\/span>, <span class=\"s2\"><b>excellent crack resistance<\/b><\/span> and <span class=\"s2\"><b>a long service life<\/b><\/span> even in the most aggressive corrosion environments. It offers quality, safety and a long-life solution particularly for professionals working in sectors such as <span class=\"s2\"><b>energy, marine and petrochemicals<\/b><\/span>. Its high initial cost is more than covered by the safety and durability it offers throughout its service life.<\/p>\n<h5><span class=\"s1\"><b>#ASTMA182<br \/>\n<\/b><\/span><span class=\"s1\"><b>#ASTMA240<\/b><\/span><br \/>\n<span class=\"s1\"><b>#ASTMA479<br \/>\n<\/b><\/span><span class=\"s1\"><b>#ASTMA789<br \/>\n<\/b><\/span><span class=\"s1\"><b>#ASTMA276<br \/>\n<\/b><\/span><b><span class=\"s1\">#<\/span>EN1.4410<br \/>\n<span class=\"s1\">#<\/span>X2CrNiMoN25-7-4<br \/>\n<\/b><b><span class=\"s1\">#<\/span><\/b><span class=\"s1\"><b>ISO15156<\/b><\/span><\/h5>\n<p><!-- dm-tablo --><\/p>\n<div class=\"dm-tablo\" style=\"border:1px solid #d7dfe4;background:#ffffff;margin:24px 0 18px;\">\n<div style=\"background:#DD3333;color:#ffffff;font-size:13px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;padding:10px 12px;line-height:1.35;\">Chemical Composition \u00b7 AISI F53 (1.4410)<\/div>\n<div style=\"padding:2px 12px 8px;\">\n<table id=\"tablepress-34\" class=\"tablepress tablepress-id-34\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">Kimyasal \u00d6zellikler <strong><\/th><th class=\"column-2\">Min.<\/th><th class=\"column-3\">Max.<\/th><td class=\"column-4\"><\/td><th class=\"column-5\">Mekanik \u00d6zellikler<\/th><th class=\"column-6\">De\u011fer<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">C<\/td><td class=\"column-2\">-<\/td><td class=\"column-3\">0.030<\/td><td class=\"column-4\"><\/td><td class=\"column-5\">Tensile Strength (MPa)<\/td><td class=\"column-6\">750-930<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">Mn<\/td><td class=\"column-2\">-<\/td><td class=\"column-3\">1.20<\/td><td class=\"column-4\"><\/td><td class=\"column-5\">Proof Stress (MPa)<\/td><td class=\"column-6\">-<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">Si<\/td><td class=\"column-2\">-<\/td><td class=\"column-3\">0.80<\/td><td class=\"column-4\"><\/td><td class=\"column-5\">Elongation A50 mm<\/td><td class=\"column-6\">25<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">P<\/td><td class=\"column-2\">-<\/td><td class=\"column-3\">0.035<\/td><td class=\"column-4\"><\/td><td class=\"column-5\">Hardness Brinell<\/td><td class=\"column-6\">260 Max HB<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">S<\/td><td class=\"column-2\">-<\/td><td class=\"column-3\">0.015<\/td><td class=\"column-4\"><\/td><td class=\"column-5\">Density<\/td><td class=\"column-6\">7.75 g\/cm3<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\">Cr<\/td><td class=\"column-2\">24.00<\/td><td class=\"column-3\">26.00<\/td><td class=\"column-4\"><\/td><td class=\"column-5\">Melting Point<\/td><td class=\"column-6\">1396-1450 \u00b0C<\/td>\n<\/tr>\n<tr class=\"row-8\">\n\t<td class=\"column-1\">Ni<\/td><td class=\"column-2\">6.00<\/td><td class=\"column-3\">8.00<\/td><td class=\"column-4\"><\/td><td class=\"column-5\">Modulus of Elasticity<\/td><td class=\"column-6\">210 Gpa<\/td>\n<\/tr>\n<tr class=\"row-9\">\n\t<td class=\"column-1\">N<\/td><td class=\"column-2\">-<\/td><td class=\"column-3\">0.30<\/td><td class=\"column-4\"><\/td><td class=\"column-5\">Electrical Resistivity<\/td><td class=\"column-6\">2.2 x10^-6 \u03a9 .m<\/td>\n<\/tr>\n<tr class=\"row-10\">\n\t<td class=\"column-1\">Mo<\/td><td class=\"column-2\">3.00<\/td><td class=\"column-3\">5.00<\/td><td class=\"column-4\"><\/td><td class=\"column-5\">Thermal Conductivity<\/td><td class=\"column-6\">15.0 W\/m.K<\/td>\n<\/tr>\n<tr class=\"row-11\">\n\t<td class=\"column-1\">Cu<\/td><td class=\"column-2\">-<\/td><td class=\"column-3\">0.5<\/td><td class=\"column-4\"><\/td><td class=\"column-5\">Thermal Expansion<\/td><td class=\"column-6\">13.0 x10^-6 \/K<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-34 from cache --><\/div>\n<\/div>\n<p><!-- \/dm-tablo --><\/p>\n<p><!-- dm-ic-baglanti --><\/p>\n<div class=\"dm-ic-baglanti\" style=\"margin:28px 0 0;border:1px solid #e0e0e0;border-left:4px solid #DD3333;background:#FAFAFA;padding:16px 18px;\">\n<p style=\"font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#DD3333;margin:0 0 6px;line-height:1.4;\">We supply this material<\/p>\n<p style=\"margin:0 0 12px;font-size:15px;line-height:1.65;color:#333;\">We supply AISI F53 (1.4410) \u2014 in the dimensions and forms required. For stock availability and pricing:<\/p>\n<p><a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-f53\/\" style=\"display:inline-block;color:#ffffff;background:#24BEE5;text-decoration:none;font-weight:600;font-size:14px;padding:10px 17px;line-height:1.2;\">AISI F53 product page \u2192<\/a>\n<\/div>\n<p><!-- \/dm-ic-baglanti --><\/p>\n<p><!-- dm-benzer --><\/p>\n<div class=\"dm-benzer\" style=\"margin:22px 0 0;padding:14px 16px;border:1px solid #e0e0e0;background:#FBFCFD;\">\n<p style=\"font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#9aa3a8;margin:0 0 8px;line-height:1.4;\">Similar products<\/p>\n<p style=\"margin:0;font-size:15px;line-height:2;color:#333;\"><a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-f55\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">AISI F55<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-318\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">AISI 318<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-329\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">AISI 329<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/duplex-steels\/\" style=\"color:#666;font-weight:600;text-decoration:none;\">Duplex steels \u2192<\/a><\/p>\n<\/div>\n<p><!-- \/dm-benzer --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>AISI F53 (1.4410 \/ UNS S32750) is a super duplex stainless steel with a 50% ferrite \u2013 50% austenite structure. Chemical composition, mechanical properties, PREN above 40, ASTM A182 \/ A240 \/ A479 \/ A790 and ISO 15156 standards, oil and gas, marine and chemical process applications.<\/p>\n","protected":false},"author":1,"featured_media":2147,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-4099","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>AISI F53 (1.4410 \/ UNS S32750) \u2014 Super Duplex Stainless Steel - Defence Metal<\/title>\n<meta name=\"description\" content=\"AISI F53 (1.4410 \/ UNS S32750) is a super duplex stainless steel with a 50% ferrite \u2013 50% austenite structure.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.defencemetal.com\/index.php\/2025\/06\/20\/aisi-f53-1-4410-uns-s32750-super-duplex-stainless-steel\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"AISI F53 (1.4410 \/ UNS S32750) \u2014 Super Duplex Stainless Steel - 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