{"id":4114,"date":"2025-06-24T11:49:46","date_gmt":"2025-06-24T08:49:46","guid":{"rendered":"https:\/\/www.defencemetal.com\/?p=4114"},"modified":"2026-09-17T23:07:37","modified_gmt":"2026-09-17T20:07:37","slug":"monel-k-500-2-4375-uns-n05500-ams-4676-nickel-copper-alloy","status":"publish","type":"post","link":"https:\/\/www.defencemetal.com\/index.php\/2025\/06\/24\/monel-k-500-2-4375-uns-n05500-ams-4676-nickel-copper-alloy\/","title":{"rendered":"Monel K-500 (2.4375 \/ UNS N05500) \u2014 AMS 4676 Nickel-Copper Alloy"},"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 Monel K-500.<\/strong> For dimensions, standard equivalents, stock and quotations, take a look at the <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/monel-k500\/\"><strong>Monel K-500 product page<\/strong><\/a>.<\/div>\n<p><!-- \/dm-urun-link --><\/p>\n<h3><b>MONEL K-500 (UNS N05500): An Age Hardened Nickel-Copper Alloy<\/b><\/h3>\n<h3><b>Alloy Definition and Chemical Composition<\/b><\/h3>\n<p class=\"p3\"><span class=\"s2\">Monel K-500<\/span> is an enhanced version of the nickel-copper based Monel 400 alloy. This alloy is a material that preserves the high corrosion resistance of <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/monel-400\/\">Monel 400<\/a> while its mechanical strength has been increased by the <span class=\"s2\">precipitation hardening<\/span> method through the addition of <span class=\"s2\">the elements aluminium and titanium<\/span>. Monel K-500 draws attention with its <span class=\"s2\">high strength<\/span>, <span class=\"s2\">excellent <a href=\"https:\/\/en.wikipedia.org\/wiki\/S%C3%BCneklik\">ductility<\/a><\/span>, <span class=\"s2\">extraordinary resistance to sea water<\/span> and <span class=\"s2\">non-magnetic properties<\/span>.<\/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>Nickel (Ni)<\/b><\/span>: 63.0% min (contains some cobalt)<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Copper (Cu)<\/b><\/span>: 27.0\u201333.0%<\/li>\n<li class=\"p1\"><b>Aluminium (Al)<\/b><span class=\"s1\">: 2.3\u20133.15%<\/span><\/li>\n<li class=\"p1\"><b>Titanium (Ti)<\/b><span class=\"s1\">: 0.35\u20130.85%<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Iron (Fe)<\/b><\/span>: 2.0% max<\/li>\n<li class=\"p1\"><b>Manganese (Mn)<\/b><span class=\"s1\">: 1.5% max<\/span><\/li>\n<li class=\"p1\"><b>Silicon (Si)<\/b><span class=\"s1\">: 0.5% max<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Carbon (C)<\/b><\/span>: 0.25% max<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Sulphur (S)<\/b><\/span>: 0.01% max<\/li>\n<\/ul>\n<p class=\"p3\">The precipitation hardening carried out after the ageing operation is achieved through the formation of nickel-aluminium and nickel-titanium phases.<\/p>\n<hr>\n<h3><b>MONEL K-500 Standards and Specifications<\/b><\/h3>\n<p class=\"p3\"><span class=\"s2\"><b>Monel K-500<\/b><\/span> is an alloy defined in detail in international technical standards. The principal norms taken as a reference in purchasing and engineering design:<\/p>\n<ul>\n<li class=\"p1\"><span class=\"s1\"><b>ASTM B865<\/b><\/span> \u2013 For Monel K-500 bar, forged and formed products<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>ASTM B564<\/b><\/span> \u2013 Flanges and fittings<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>ASTM B163 \/ B165<\/b><\/span> \u2013 Pipes and tubes<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>UNS N05500<\/b><\/span> \u2013 Unified Numbering System code<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>AMS 4676<\/b><\/span> \u2013 Hardened bar and forged products for the aerospace industry<\/li>\n<li class=\"p1\"><b>ISO 6208<\/b><\/li>\n<li class=\"p1\"><b><\/b><span class=\"s1\"><b>Werkstoff Nr. 2.4375<\/b><\/span> \u2013 Its equivalent according to the German DIN standard<\/li>\n<\/ul>\n<hr>\n<h3><b>MONEL K-500 <\/b><b>Trade Names and Equivalent Materials<\/b><\/h3>\n<ul>\n<li class=\"p1\"><span class=\"s1\"><b>Monel\u00ae K-500<\/b><\/span> \u2013 Trade name registered by Special Metals Corporation (SMC)<\/li>\n<li class=\"p1\"><b>Alloy K500<\/b><\/li>\n<li class=\"p1\"><b><\/b><span class=\"s1\"><b>Nicrofer 5120<\/b><\/span> \u2013 Under the VDM Metals brand<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>2.4375<\/b><\/span> \u2013 DIN\/Werkstoff designation<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Nicorros\u00ae K500<\/b><\/span> \u2013 Haynes International equivalent<\/li>\n<\/ul>\n<p class=\"p3\">These trade names may appear differently in suppliers&#8217; catalogues. All variants carry the same technical characteristics.<\/p>\n<hr>\n<h3><b>MONEL K-500 <\/b><b>Mechanical and Physical Properties<\/b><\/h3>\n<p class=\"p3\">Monel K-500 is an alloy to which an age hardening operation has been applied. It therefore has much higher strength values than Monel 400. It can be machined in the unhardened condition and is then hardened by ageing.<\/p>\n<p class=\"p4\"><b>Typical mechanical values in the aged (hardened) condition:<\/b><b><\/b><\/p>\n<ul>\n<li class=\"p1\"><b>Tensile Strength:<\/b><span class=\"s1\"> 965\u20131100 MPa<\/span><\/li>\n<li class=\"p1\"><b>Yield Strength:<\/b><span class=\"s1\"> 690\u2013830 MPa<\/span><\/li>\n<li class=\"p1\"><b>Elongation (%):<\/b><span class=\"s1\"> 15\u201325%<\/span><\/li>\n<li class=\"p1\"><b>Hardness (Rockwell C):<\/b><span class=\"s1\"> RC 22\u201335<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Density:<\/b><\/span> 8.44 g\/cm\u00b3<\/li>\n<li class=\"p1\"><b>Melting point:<\/b><span class=\"s1\"> 1300\u20131350 \u00b0C<\/span><\/li>\n<li class=\"p1\"><b>Thermal conductivity:<\/b><span class=\"s1\"> ~21 W\/m\u00b7K<\/span><\/li>\n<li class=\"p1\"><b>Modulus of elasticity:<\/b><span class=\"s1\"> 179 GPa<\/span><\/li>\n<\/ul>\n<p class=\"p3\">It is easier to machine in the un-aged (annealed) condition; strength increases markedly after ageing. Its non-magnetic character may become partially magnetic with ageing, but remains at a low level.<\/p>\n<hr>\n<h3><b>Application Areas<\/b><\/h3>\n<p class=\"p3\">Both the corrosion resistance and the high strength of Monel K-500 make it an important engineering material in the following fields:<\/p>\n<p class=\"p1\"><b>1.Oil and Gas Industry<\/b><b><\/b><\/p>\n<p class=\"p1\">#Pump shafts, well tools, drilling parts<br \/>\n#Fittings used in sulphurous gas and crude oil environments<\/p>\n<p class=\"p1\"><b>2.Marine<\/b><b><\/b><\/p>\n<p class=\"p1\">#Propeller shafts, underwater fasteners<br \/>\n#Subsea pump and valve systems<br \/>\n#Shafts and fasteners exposed to salt water<\/p>\n<p class=\"p1\"><b>3.Chemical and Process Industry<\/b><b><\/b><\/p>\n<p class=\"p1\">#Agitators operating in abrasive environments<br \/>\n#Valves in contact with alkaline and acid solutions<\/p>\n<p class=\"p1\"><b>4.Aerospace<\/b><b><\/b><\/p>\n<p class=\"p1\">#Hydraulic system parts<br \/>\n#Fasteners, bolts and rivets<br \/>\n#Gas turbine components<\/p>\n<p class=\"p1\"><b>5.Military Applications<\/b><b><\/b><\/p>\n<p class=\"p1\">#Torpedo propellers<br \/>\n#Submarine parts and surface vessel connection systems<\/p>\n<p class=\"p4\"><span class=\"s3\">Monel K-500 is qualified to serve, besides its <\/span><b>high mechanical strength<\/b><span class=\"s3\">, <\/span><b>in environments where environmental corrosion is intense<\/b><span class=\"s3\">.<\/span><\/p>\n<hr>\n<h3><b>Advantages<\/b><\/h3>\n<ul>\n<li class=\"p1\"><b>High Mechanical Strength: <\/b>It offers approximately twice the tensile and yield strength compared with Monel 400.<\/li>\n<li class=\"p1\"><b>Corrosion Resistance: <\/b>It shows high resistance to sea water, sulphur compounds, alkalis and many acid environments.<\/li>\n<li class=\"p1\"><b>Hardenability by Ageing: <\/b>An increase in strength can be achieved by heat treatment.<\/li>\n<li class=\"p1\"><b>Non-Magnetic Character (Partly): <\/b>In the un-aged condition it has a completely non-magnetic structure.<\/li>\n<li class=\"p1\"><b>Cryogenic Stability: <\/b>It does not compromise on ductility at low temperatures and shows no embrittlement.<\/li>\n<\/ul>\n<hr>\n<h3><b>Disadvantages<\/b><\/h3>\n<ul>\n<li class=\"p1\"><b>Restricted Machinability After Heat Treatment: <\/b>Machinability becomes difficult after ageing; operations should generally be carried out before hardening.<\/li>\n<li class=\"p1\"><b>Partial Magnetisation: <\/b>After ageing, weak magnetism may arise at a level that is unwanted for some applications.<\/li>\n<li class=\"p1\"><b>High Cost: <\/b>Its nickel-based structure and the ageing operations make it economically high in cost.<\/li>\n<li class=\"p1\"><b>Limited Performance in Oxidising Acids: <\/b>It is not preferred in environments such as nitric acid; alloys of the Inconel or Hastelloy class are more suitable for these conditions.<\/li>\n<\/ul>\n<hr>\n<h3><b>Conclusion and Engineering Evaluation<\/b><\/h3>\n<p class=\"p3\"><span class=\"s2\"><b>Monel K-500<\/b><\/span>, while preserving all the corrosion durability advantages of <span class=\"s2\"><b>Monel 400<\/b><\/span>, has been turned through ageing heat treatments into <span class=\"s2\"><b>a high strength super alloy with high fatigue strength<\/b><\/span>. Thanks to these properties it is used with confidence in subsea systems, drilling tools and aerospace fasteners alike.<\/p>\n<p class=\"p3\">With its age hardening property it can adapt to different design requirements across a broad engineering spectrum. In environments where high performance is sought but stainless steels fall short, <span class=\"s2\"><b>Monel K-500<\/b><\/span> offers, when assessed from both a technical and an economic point of view, <span class=\"s2\"><b>a top level engineering solution<\/b><\/span>.<\/p>\n<p>&nbsp;<\/p>\n<h5>#MonelK500<br \/>\n#AlloyK500<br \/>\n#AlloyK500<br \/>\n#UNS N05500<br \/>\n#2.4375<br \/>\n#ASTMB865<br \/>\n#AMS4676<\/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 Monel K-500 (2.4375)<\/div>\n<div style=\"padding:2px 12px 8px;\">\n<table id=\"tablepress-61\" class=\"tablepress tablepress-id-61\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">Kimyasal Bile\u015fimi<br \/>\n(Monel K-500)<br \/>\n<strong><\/th><td class=\"column-2\"><\/td><th class=\"column-3\">Oda S\u0131cakl\u0131\u011f\u0131ndaki<br \/>\nMekanik \u00d6zellikleri<br \/>\n<strong><\/th><td class=\"column-4\"><\/td>\n<\/tr>\n<tr class=\"row-2\">\n\t<th class=\"column-1\">Kalite <strong><\/th><th class=\"column-2\">Monel K-500 (2.4375)<\/th><th class=\"column-3\">\u00d6zellikler<\/th><th class=\"column-4\">De\u011ferler<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-hover\">\n<tr class=\"row-3\">\n\t<td class=\"column-1\">Ni+Co<\/td><td class=\"column-2\">min %63.0<\/td><td class=\"column-3\">\u00d6z k\u00fctlesi (\u00d6zg\u00fcl a\u011f\u0131rl\u0131\u011f\u0131)<\/td><td class=\"column-4\">8440 kg\/m\u00b3<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">Cu<\/td><td class=\"column-2\">%27.0-33.0<\/td><td class=\"column-3\">Erime S\u0131cakl\u0131\u011f\u0131<\/td><td class=\"column-4\">1315 \u2013 1350 \u00b0C aras\u0131<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">Fe<\/td><td class=\"column-2\">max %2.00<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">C<\/td><td class=\"column-2\">max %0.25<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\">Mn<\/td><td class=\"column-2\">max %1.50<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td>\n<\/tr>\n<tr class=\"row-8\">\n\t<td class=\"column-1\">Si<\/td><td class=\"column-2\">max %0.50<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td>\n<\/tr>\n<tr class=\"row-9\">\n\t<td class=\"column-1\">S<\/td><td class=\"column-2\">max %0.01<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td>\n<\/tr>\n<tr class=\"row-10\">\n\t<td class=\"column-1\">Al<\/td><td class=\"column-2\">%2.30-3.15<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td>\n<\/tr>\n<tr class=\"row-11\">\n\t<td class=\"column-1\">Ti<\/td><td class=\"column-2\">%0.35-0.85<\/td><td class=\"column-3\"><\/td><td class=\"column-4\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-61 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 Monel K-500 (2.4375) \u2014 to the AMS 4676 standard, in the dimensions and forms required. For stock availability and pricing:<\/p>\n<p><a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/monel-k500\/\" style=\"display:inline-block;color:#ffffff;background:#24BEE5;text-decoration:none;font-weight:600;font-size:14px;padding:10px 17px;line-height:1.2;\">Monel K-500 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\/2025\/06\/24\/waspaloy-2-4654-uns-n07001-ams-5544-ams-5706-nickel-super-alloy\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">Waspaloy<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/2025\/06\/24\/nimonic-80a-uns-n07080-ams-4378-ams-5829-nickel-super-alloy\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">Nimonic 80A<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/2025\/06\/01\/haynes-25-l-605-ams-5537-ams-5759-cobalt-superalloy\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">Haynes 25<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/inconel-600\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">Inconel 600<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/nickel-alloys\/\" style=\"color:#666;font-weight:600;text-decoration:none;\">All nickel alloys \u2192<\/a><\/p>\n<\/div>\n<p><!-- \/dm-benzer --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Monel K-500 (2.4375 \/ UNS N05500) is an age hardened nickel-copper alloy with roughly twice the strength of Monel 400 and excellent sea water resistance. Chemical composition, mechanical and physical properties, ASTM B865 \/ B564 and AMS 4676 standards, trade names, oil and gas, marine, aerospace and defence applications.<\/p>\n","protected":false},"author":1,"featured_media":2127,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-4114","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>Monel K-500 (2.4375 \/ UNS N05500) \u2014 AMS 4676 Nickel-Copper Alloy - Defence Metal<\/title>\n<meta name=\"description\" content=\"Monel K-500 (2.4375 \/ UNS N05500) is an age hardened nickel-copper alloy with roughly twice the strength of Monel 400 and excellent sea water resistance.\" \/>\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\/24\/monel-k-500-2-4375-uns-n05500-ams-4676-nickel-copper-alloy\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Monel K-500 (2.4375 \/ UNS N05500) \u2014 AMS 4676 Nickel-Copper Alloy - 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