{"id":1021,"date":"2025-02-20T15:15:58","date_gmt":"2025-02-20T09:45:58","guid":{"rendered":"https:\/\/www.solitaire-overseas.com\/blog\/?p=1021"},"modified":"2026-04-22T18:29:17","modified_gmt":"2026-04-22T12:59:17","slug":"what-are-duplex-steel-fittings-a-complete-guide","status":"publish","type":"post","link":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/","title":{"rendered":"What Are Duplex Steel Fittings? Types, Properties &#038; Complete Guide"},"content":{"rendered":"<div class=\"ttr_start\"><\/div><p><span style=\"font-weight: 400;\">This guide explains what duplex steel fittings are covering their metallurgy, grades, mechanical properties, types, industrial applications, and how they compare to standard stainless steel. If you are looking to buy duplex steel fittings, see our<\/span><a href=\"https:\/\/www.solitaire-overseas.com\/duplex-steel-fittings.html\"> <span style=\"font-weight: 400;\">Duplex Steel Fittings product page<\/span><\/a><span style=\"font-weight: 400;\"> for specifications, pricing, and stock.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Looking to buy duplex steel fittings?\u00a0<\/b><a href=\"https:\/\/www.solitaire-overseas.com\/duplex-steel-fittings.html\"> <b>\u2192 View full product range, specifications &amp; get a quote<\/b><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><b>What Are Duplex Steel Fittings?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Duplex steel fittings are pipe components manufactured from duplex stainless steel \u2014 a dual-phase austenitic-ferritic alloy that combines the best properties of both ferritic and austenitic structures into a single material. The term &#8216;duplex&#8217; refers to this two-phase microstructure (approximately 50% austenite \/ 50% ferrite), which is responsible for the material&#8217;s exceptional balance of strength and corrosion resistance.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The most widely used grade is Duplex 2205 (UNS S31803 \/ UNS S32205), which accounts for more than 80% of all duplex steel applications globally. Duplex stainless steels are governed by material standard ASTM A815 (for wrought pipe fittings) with dimensional standards ASME B16.9 (buttweld), ASME B16.11 (forged socket weld and threaded), and MSS SP-43.\u00a0<\/span><\/p>\n<h2><b>Types of Duplex Steel Fittings<\/b><\/h2>\n<h3><b>Buttweld Fittings (ASME B16.9 \/ B16.28)\u00a0<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Well-welded fittings form an elementary Zen of the high-pressure piping systems. They are utilized on piping systems to promote smooth fluid flow and ensure their structural integrity. Unlike their towel fittings, the buttweld fitting connected with a ballsy lock on the circumferences can\u2019t be called such since a secure bonding is ensured by welding it straight onto the pipe. In their ambit are generally:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>90\u00b0 Long Radius Elbows (1.5D) &amp; Short Radius Elbows (1D)<\/b><span style=\"font-weight: 400;\"> \u2014 change pipe direction with minimal pressure drop<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>45\u00b0 Elbows<\/b><span style=\"font-weight: 400;\"> \u2014 gentler directional change, lower turbulence<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>180\u00b0 Return Bends<\/b><span style=\"font-weight: 400;\"> \u2014 U-bends used in heat exchangers and coil systems<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Equal Tees<\/b><span style=\"font-weight: 400;\"> \u2014 three-way equal outlet for flow distribution<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Reducing Tees<\/b><span style=\"font-weight: 400;\"> \u2014 branch outlet smaller than run; Y-tee and lateral tee also available<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Concentric Reducers<\/b><span style=\"font-weight: 400;\"> \u2014 symmetric size reduction on vertical lines<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Eccentric Reducers<\/b><span style=\"font-weight: 400;\"> \u2014 off-centre reduction for pump suction and horizontal lines<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Caps &amp; Stub Ends<\/b><span style=\"font-weight: 400;\"> \u2014 close pipe ends; stub ends used with lap joint flanges<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Pipe Bends (3D\u201310D)<\/b><span style=\"font-weight: 400;\"> \u2014 hot induction or mandrel bending for minimal flow resistance<\/span><\/li>\n<\/ul>\n<h3><b>Forged Fittings (ASME B16.11)\u00a0<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Forged fittings are manufactured by pressing duplex steel under high force, producing a denser grain structure with higher strength. They are used for <\/span><b>small-bore, high-pressure applications<\/b><span style=\"font-weight: 400;\"> in pressure classes 3000#, 6000#, and 9000#:\u00a0<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Socket Weld Fittings<\/b><span style=\"font-weight: 400;\"> \u2014 pipe is inserted into a socket and fillet-welded; leak-proof for high-pressure service<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Threaded Fittings (NPT \/ BSP \/ BSPT)<\/b><span style=\"font-weight: 400;\"> \u2014 internal or external threads for tool-free assembly without welding<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Couplings<\/b><span style=\"font-weight: 400;\"> \u2014 full and half couplings for inline and branch connections<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Unions<\/b><span style=\"font-weight: 400;\"> \u2014 three-piece design enabling quick disconnection for maintenance<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><b>Crosses<\/b><span style=\"font-weight: 400;\"> \u2014 four-way distribution fittings for chemical process skids<\/span><\/li>\n<\/ul>\n<h3><b>Flanged Connections\u00a0<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Flanges allow pipe sections and equipment to be bolted together and are classified by facing type (RF, FF, RTJ) and pressure class (150# to 2500#). For full details, see our<\/span><a href=\"https:\/\/www.solitaire-overseas.com\/duplex-steel-flanges.html\"> <span style=\"font-weight: 400;\">Duplex Steel Flanges page<\/span><\/a><span style=\"font-weight: 400;\">.\u00a0<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Need duplex steel fittings \u2014 elbows, tees, reducers, or custom sizes?<\/b><a href=\"https:\/\/www.solitaire-overseas.com\/duplex-steel-fittings.html\"> <b>\u2192 View our full product range &amp; get a quote<\/b><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><b>Applications of Duplex Steel Fittings<\/b><\/h2>\n<p><b>Oil and Gas Industry<\/b><span style=\"font-weight: 400;\"> \u2013 Operating within extreme working conditions that may consist of high pressure and corrosive environments, duplex steel fittings find extensive use in:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pipeline: Transport crude oil and natural gas over extensive distances.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Platforms: Resist seawater corrosion and mechanical stress due to extreme conditions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Refineries: Process aggressive chemicals and withstand extreme temperatures.<\/span><\/li>\n<\/ul>\n<p><b>Chemical and Petrochemical Processing<\/b><span style=\"font-weight: 400;\"> \u2013 petrochemical and chemical facilities employ materials that resist many corrosive and acidic substances. Duplex steel fittings ensure safety and performance as they resist:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Corrosive chemicals such as hydrochloric acid and sulfuric acid.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">High-Temperature Processes that endure thermal stress.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Robust and leak-proof piping systems for process piping.<\/span><\/li>\n<\/ul>\n<p><b>Marine Industry \u2013 <\/b><span style=\"font-weight: 400;\">The marine business demands a material that demonstrates great resistance to saltwater and abrasive marine conditions. Duplex steel fittings have found their application in:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Shipbuilding: High resistance to pitting and crevice corrosion.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Desalination Plants: Minimizing maintenance in harsh conditions with abundant chloride.<\/span><\/li>\n<\/ul>\n<p><b>Power Plants \u2013<\/b><span style=\"font-weight: 400;\"> The generation of electricity requires materials that perform well at very high temperatures and very high pressures. Again duplex steel fittings are critical in:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Heat Exchangers: Greatly improve thermal efficiency, show thermal fatigue resistance.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Boilers: Perform well under high temperatures.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pipelines: They could tolerate changes in pressure and temperature at high pressure.<\/span><\/li>\n<\/ul>\n<p><b>Pharmaceuticals and Food Processing \u2013 <\/b><span style=\"font-weight: 400;\">The leading areas of research into hygiene, safety, and corrosion are orthogonal to the choice of materials. It is this union that gives duplex steel fittings cause to stand in:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Hygienic piping systems eliminate contamination and ensure their fitness under any regulation.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sterile condition: Smooth, nonreactive surfaces ensure the purity of the product.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Corrosion resistance: Providing the necessary protection against cleaning and sterilization procedures.\u00a0<\/span><\/li>\n<\/ul>\n<h2><b>Properties of Duplex Steel Fittings<\/b><\/h2>\n<p><b>High Tensile Strength<\/b><span style=\"font-weight: 400;\"> \u2013 These Duplex steel fittings are much stronger and, therefore, last and endure high tensile stress. This property guarantees durability and reliability of use even in high-stress applications like offshore platforms, pipelines, and refineries.<\/span><\/p>\n<p><b>Exceptional Corrosion Resistance Properties <\/b><span style=\"font-weight: 400;\">\u2013 Durable duplex steel fittings will not corrode easily. They are able to do so because they counter act<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Stress Corrosion Cracking: Good while moving through areas with constant stress and Chloride infiltration.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pitting and Crevice Corrosion: Working well for applications with seawater, acid environments, as well as the highly corrosive atmosphere.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Durability Against Oxidation: They resist rust failing in temperature and within chemical application process settings.<\/span><\/li>\n<\/ul>\n<p><b>High Fatigue Resistance <\/b><span style=\"font-weight: 400;\">\u2013 The cyclic load doesn\u2019t affect the duplex steel fittings very much. Hence, they are good for use under high-pressure conditions. These properties find applications in:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pipelines in Oil &amp; Gas: Subject to varied pressure alongside corrosive environments.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Marine Applications: Due to cyclical pressure from waves and currents.<\/span><\/li>\n<\/ul>\n<p><b>Good Toughness and Ductility \u2013<\/b><span style=\"font-weight: 400;\"> Though Duplex steel fittings possess great strength, they display outstanding toughness and ductility. As a result, they are fit for service even in the sub-zero temperature:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cryogenic Application: Performing excellently under frigid cold conditions without becoming brittle.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Structural Components: A great mix of stiffness along with resistance to impacts.<\/span><\/li>\n<\/ul>\n<p><b>Very High Thermal Conductivity \u2013<\/b><span style=\"font-weight: 400;\"> Duplex steel fittings are very good heat conductors, thus making them suitable in their operations in high-temperature applications:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Heat Exchangers: Having efficient conducting properties that guarantee enhancement in heat exchange.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Boilers &amp; Power Plants: Relief on thermal stress along with enhancement in efficiency.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><b>Improved and More Wear Resistant \u2013<\/b><span style=\"font-weight: 400;\"> Duplex steel fittings are retained with lower politics towards wear and abrasion, hence making them apt for use in:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Mining and Material Handling Equipment: Reduction in degree of wear when mixing with abrasive materials.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Industrial Machinery: Higher longevity and lower costs of maintenance.<\/span><\/li>\n<\/ul>\n<h2><b>Manufacturing of Duplex Steel Fittings<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The manufacturing of duplex steel fittings involves several critical processes to ensure high quality and durability. These steps include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Raw Material Selection<\/b><span style=\"font-weight: 400;\">: High-quality duplex stainless steel is selected based on industry standards.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Forging &amp; Forming<\/b><span style=\"font-weight: 400;\">: The steel is heated and shaped into the required fitting dimensions.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Heat Treatment<\/b><span style=\"font-weight: 400;\">: The fittings undergo annealing to enhance mechanical properties and corrosion resistance.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Machining &amp; Finishing<\/b><span style=\"font-weight: 400;\">: Precision machining ensures accurate dimensions, followed by surface finishing treatments.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Testing &amp; Quality Control<\/b><span style=\"font-weight: 400;\">: Rigorous inspections such as hydrostatic, ultrasonic, and mechanical tests are performed to ensure compliance with industry standards.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Final Inspection &amp; Packaging<\/b><span style=\"font-weight: 400;\">: The fittings are inspected for defects and securely packaged for safe transportation.<\/span><\/li>\n<\/ul>\n<h2><b>Conclusion<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">With well defined standards <\/span><a href=\"https:\/\/www.solitaire-overseas.com\/\"><span style=\"font-weight: 400;\">Solitaire Overseas<\/span><\/a><span style=\"font-weight: 400;\"> are sophisticated and reliable solutions which lasts for decades without any issue. It is available at a reasonable price in top markets of the country. We keep in mind the trust and legacy of our brand and then move forwards towards supply of our Duplex steel fittings. Choose us for excellent pipe fittings today!<\/span><\/p>\n<h2><b>Frequently Asked Questions<\/b><\/h2>\n<h3><b>1. What are duplex steel fittings?<\/b><\/h3>\n<p><b>Duplex steel fittings<\/b><span style=\"font-weight: 400;\"> are precision pipe components manufactured from duplex stainless steel \u2014 a <\/span><b>dual-phase austenitic-ferritic alloy<\/b><span style=\"font-weight: 400;\"> that delivers approximately <\/span><b>twice the yield strength of 316L<\/b><span style=\"font-weight: 400;\"> and superior resistance to chloride-induced corrosion. The most common grade is <\/span><b>UNS S31803 \/ Duplex 2205<\/b><span style=\"font-weight: 400;\">, widely specified in oil &amp; gas, desalination, marine, and chemical processing.<\/span><a href=\"https:\/\/www.solitaire-overseas.com\/duplex-steel-fittings.html\"><span style=\"font-weight: 400;\">\u00a0<\/span><\/a><\/p>\n<h3><b>2. What is the difference between duplex and stainless steel fittings?<\/b><\/h3>\n<p><b>Duplex 2205 pipe fittings<\/b><span style=\"font-weight: 400;\"> offer a PREN of 30\u201340 versus 23\u201325 for 316L, making them the preferred choice in <\/span><b>chloride-rich, high-pressure, and sour service environments<\/b><span style=\"font-weight: 400;\"> where 316L fails prematurely due to pitting or stress corrosion cracking. Yield strength is approximately 2\u00d7 that of 316L (450 MPa vs 210 MPa). If budget is the primary concern and the environment is mild, 316L is adequate. For critical offshore, seawater, and chemical applications, duplex is the engineered solution.<\/span><\/p>\n<h3><b>3. What types of duplex steel fittings are available?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Duplex fittings include: <\/span><b>buttweld fittings<\/b><span style=\"font-weight: 400;\"> (elbows 45\u00b0\/90\u00b0\/180\u00b0, equal and reducing tees, concentric and eccentric reducers, caps, stub ends, pipe bends 3D\u201310D) and <\/span><b>forged fittings<\/b><span style=\"font-weight: 400;\"> (socket weld and threaded elbows, tees, couplings, crosses, unions \u2014 in 3000#, 6000#, 9000# pressure classes). Sizes range from \u00bd&#8221; to 48&#8243; NB per ASTM A815 \/ ASME B16.9 \/ B16.11.<\/span><\/p>\n<h3><b>4. When should I use duplex instead of 316L stainless steel?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Use duplex when your application involves: chloride-rich environments (seawater, brine), operating pressures above 100 bar, H\u2082S sour service (NACE MR0175 compliance required), risk of stress corrosion cracking, or where 316L has previously failed by pitting. Duplex 2205 costs roughly 2\u00d7 316L but delivers significantly longer service life under these conditions.<\/span><\/p>\n<h3><b>5. What is the most common duplex steel fittings grade?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">The most common grade is <\/span><b>Duplex 2205 (UNS S31803 \/ S32205, Werkstoff 1.4462)<\/b><span style=\"font-weight: 400;\"> per ASTM A815 \u2014 accounting for over 80% of all duplex applications. For the most aggressive service conditions (deep offshore, hot seawater above 35\u00b0C, sour gas), <\/span><b>Super Duplex UNS S32750 (2507)<\/b><span style=\"font-weight: 400;\"> is the next step up.<\/span><\/p>\n<h3><b>6. What certifications are available for duplex fittings?<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Standard supply includes <\/span><b>EN 10204 3.1 Mill Test Certificates<\/b><span style=\"font-weight: 400;\">. EN 10204 3.2 (third-party witnessed), NACE MR0175 \/ ISO 15156 (sour service), PED, IBR, and NORSOK compliance documents are available on request. Third-party inspection by SGS, TUV, BV, DNV, and LLOYDS can be arranged for critical projects.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>About Solitaire Overseas<\/b><\/p>\n<p><span style=\"font-weight: 400;\">ISO 9001:2015 certified manufacturer and supplier of duplex steel fittings, pipes, tubes, and flanges. Supplying to 60+ countries including Saudi Arabia, UAE, UK, USA, Singapore, and Australia. EN 10204 3.1\/3.2 MTCs supplied as standard. Third-party inspection available.<\/span><\/p>\n<p><b>For product enquiries:<\/b><a href=\"https:\/\/www.solitaire-overseas.com\/duplex-steel-fittings.html\"> <span style=\"font-weight: 400;\">www.solitaire-overseas.com\/duplex-steel-fittings.html<\/span><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><b>Related Technical Guides\u00a0<\/b><\/h2>\n<ul>\n<li><b><\/b><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><a href=\"https:\/\/www.solitaire-overseas.com\/blog\/what-is-super-duplex-material\/\"><b>What Is Super Duplex Material? Composition, Grades &amp; Applications<\/b><\/a><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><a href=\"https:\/\/www.solitaire-overseas.com\/blog\/the-ultimate-guide-to-stainless-steel-fittings\/\"><b>The Ultimate Guide to Stainless Steel Fittings<\/b><\/a><\/li>\n<li><b><\/b><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><a href=\"https:\/\/www.solitaire-overseas.com\/duplex-steel-pipes-tubes-supplier-exporter.html\"><b>Duplex Steel Pipes &amp; Tubes \u2014 Technical Overview<\/b><\/a><\/li>\n<\/ul>\n<div class=\"ttr_end\"><\/div>","protected":false},"excerpt":{"rendered":"<p>This guide explains what duplex steel fittings are covering their metallurgy, grades, mechanical properties, types, industrial applications, and how they compare to standard stainless steel. If you are looking to buy duplex steel fittings, see our Duplex Steel Fittings product page for specifications, pricing, and stock. Looking to buy duplex steel fittings?\u00a0 \u2192 View full [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":1022,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[],"class_list":["post-1021","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fittings-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Are Duplex Steel Fittings? A Complete Guide<\/title>\n<meta name=\"description\" content=\"Explore our comprehensive guide on duplex steel fittings, covering their composition, benefits, various types, sizes, dimensions, and applications in diverse industries.\" \/>\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.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Are Duplex Steel Fittings? A Complete Guide\" \/>\n<meta property=\"og:description\" content=\"Explore our comprehensive guide on duplex steel fittings, covering their composition, benefits, various types, sizes, dimensions, and applications in diverse industries.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"Solitaire Overseas Blog\" \/>\n<meta property=\"article:published_time\" content=\"2025-02-20T09:45:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-22T12:59:17+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/02\/What-Are-Duplex-Steel-Fittings-A-Complete-Guide.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Solitaire Overseas\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Solitaire Overseas\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/\"},\"author\":{\"name\":\"Solitaire Overseas\",\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/#\/schema\/person\/0b33847a0cff35e963c9887022e6cd96\"},\"headline\":\"What Are Duplex Steel Fittings? Types, Properties &#038; Complete Guide\",\"datePublished\":\"2025-02-20T09:45:58+00:00\",\"dateModified\":\"2026-04-22T12:59:17+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/\"},\"wordCount\":1676,\"publisher\":{\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/02\/What-Are-Duplex-Steel-Fittings-A-Complete-Guide.webp\",\"articleSection\":[\"fittings blog\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/\",\"url\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/\",\"name\":\"What Are Duplex Steel Fittings? A Complete Guide\",\"isPartOf\":{\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/02\/What-Are-Duplex-Steel-Fittings-A-Complete-Guide.webp\",\"datePublished\":\"2025-02-20T09:45:58+00:00\",\"dateModified\":\"2026-04-22T12:59:17+00:00\",\"description\":\"Explore our comprehensive guide on duplex steel fittings, covering their composition, benefits, various types, sizes, dimensions, and applications in diverse industries.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#primaryimage\",\"url\":\"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/02\/What-Are-Duplex-Steel-Fittings-A-Complete-Guide.webp\",\"contentUrl\":\"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/02\/What-Are-Duplex-Steel-Fittings-A-Complete-Guide.webp\",\"width\":1200,\"height\":500,\"caption\":\"What Are Duplex Steel Fittings A Complete Guide\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.solitaire-overseas.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"fittings blog\",\"item\":\"https:\/\/www.solitaire-overseas.com\/blog\/category\/fittings-blog\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"What Are Duplex Steel Fittings? Types, Properties &#038; Complete Guide\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/#website\",\"url\":\"https:\/\/www.solitaire-overseas.com\/blog\/\",\"name\":\"Solitaire Overseas Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.solitaire-overseas.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/#organization\",\"name\":\"Solitaire Overseas Blog\",\"url\":\"https:\/\/www.solitaire-overseas.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/08\/cropped-logo-1.webp\",\"contentUrl\":\"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/08\/cropped-logo-1.webp\",\"width\":180,\"height\":73,\"caption\":\"Solitaire Overseas Blog\"},\"image\":{\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.solitaire-overseas.com\/blog\/#\/schema\/person\/0b33847a0cff35e963c9887022e6cd96\",\"name\":\"Solitaire Overseas\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What Are Duplex Steel Fittings? A Complete Guide","description":"Explore our comprehensive guide on duplex steel fittings, covering their composition, benefits, various types, sizes, dimensions, and applications in diverse industries.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/","og_locale":"en_US","og_type":"article","og_title":"What Are Duplex Steel Fittings? A Complete Guide","og_description":"Explore our comprehensive guide on duplex steel fittings, covering their composition, benefits, various types, sizes, dimensions, and applications in diverse industries.","og_url":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/","og_site_name":"Solitaire Overseas Blog","article_published_time":"2025-02-20T09:45:58+00:00","article_modified_time":"2026-04-22T12:59:17+00:00","og_image":[{"width":1200,"height":500,"url":"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/02\/What-Are-Duplex-Steel-Fittings-A-Complete-Guide.webp","type":"image\/webp"}],"author":"Solitaire Overseas","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Solitaire Overseas","Est. reading time":"8 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#article","isPartOf":{"@id":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/"},"author":{"name":"Solitaire Overseas","@id":"https:\/\/www.solitaire-overseas.com\/blog\/#\/schema\/person\/0b33847a0cff35e963c9887022e6cd96"},"headline":"What Are Duplex Steel Fittings? Types, Properties &#038; Complete Guide","datePublished":"2025-02-20T09:45:58+00:00","dateModified":"2026-04-22T12:59:17+00:00","mainEntityOfPage":{"@id":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/"},"wordCount":1676,"publisher":{"@id":"https:\/\/www.solitaire-overseas.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#primaryimage"},"thumbnailUrl":"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/02\/What-Are-Duplex-Steel-Fittings-A-Complete-Guide.webp","articleSection":["fittings blog"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/","url":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/","name":"What Are Duplex Steel Fittings? A Complete Guide","isPartOf":{"@id":"https:\/\/www.solitaire-overseas.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#primaryimage"},"image":{"@id":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#primaryimage"},"thumbnailUrl":"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/02\/What-Are-Duplex-Steel-Fittings-A-Complete-Guide.webp","datePublished":"2025-02-20T09:45:58+00:00","dateModified":"2026-04-22T12:59:17+00:00","description":"Explore our comprehensive guide on duplex steel fittings, covering their composition, benefits, various types, sizes, dimensions, and applications in diverse industries.","breadcrumb":{"@id":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#primaryimage","url":"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/02\/What-Are-Duplex-Steel-Fittings-A-Complete-Guide.webp","contentUrl":"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/02\/What-Are-Duplex-Steel-Fittings-A-Complete-Guide.webp","width":1200,"height":500,"caption":"What Are Duplex Steel Fittings A Complete Guide"},{"@type":"BreadcrumbList","@id":"https:\/\/www.solitaire-overseas.com\/blog\/what-are-duplex-steel-fittings-a-complete-guide\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.solitaire-overseas.com\/blog\/"},{"@type":"ListItem","position":2,"name":"fittings blog","item":"https:\/\/www.solitaire-overseas.com\/blog\/category\/fittings-blog\/"},{"@type":"ListItem","position":3,"name":"What Are Duplex Steel Fittings? Types, Properties &#038; Complete Guide"}]},{"@type":"WebSite","@id":"https:\/\/www.solitaire-overseas.com\/blog\/#website","url":"https:\/\/www.solitaire-overseas.com\/blog\/","name":"Solitaire Overseas Blog","description":"","publisher":{"@id":"https:\/\/www.solitaire-overseas.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.solitaire-overseas.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.solitaire-overseas.com\/blog\/#organization","name":"Solitaire Overseas Blog","url":"https:\/\/www.solitaire-overseas.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.solitaire-overseas.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/08\/cropped-logo-1.webp","contentUrl":"https:\/\/www.solitaire-overseas.com\/blog\/wp-content\/uploads\/2025\/08\/cropped-logo-1.webp","width":180,"height":73,"caption":"Solitaire Overseas Blog"},"image":{"@id":"https:\/\/www.solitaire-overseas.com\/blog\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.solitaire-overseas.com\/blog\/#\/schema\/person\/0b33847a0cff35e963c9887022e6cd96","name":"Solitaire Overseas"}]}},"_links":{"self":[{"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/posts\/1021","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/comments?post=1021"}],"version-history":[{"count":15,"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/posts\/1021\/revisions"}],"predecessor-version":[{"id":1690,"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/posts\/1021\/revisions\/1690"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/media\/1022"}],"wp:attachment":[{"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/media?parent=1021"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/categories?post=1021"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.solitaire-overseas.com\/blog\/wp-json\/wp\/v2\/tags?post=1021"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}