{"id":4116,"date":"2025-06-24T14:26:01","date_gmt":"2025-06-24T11:26:01","guid":{"rendered":"https:\/\/www.defencemetal.com\/?p=4116"},"modified":"2026-09-17T23:07:35","modified_gmt":"2026-09-17T20:07:35","slug":"custom-455-uns-s45500-ams-5617-ams-5860-stainless-steel","status":"publish","type":"post","link":"https:\/\/www.defencemetal.com\/index.php\/2025\/06\/24\/custom-455-uns-s45500-ams-5617-ams-5860-stainless-steel\/","title":{"rendered":"Custom 455 (UNS S45500) \u2014 AMS 5617 \/ AMS 5860 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 Custom 455.<\/strong> For dimensions, standard equivalents, stock and quotations, take a look at the <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/custom-455\/\"><strong>Custom 455 product page<\/strong><\/a>.<\/div>\n<p><!-- \/dm-urun-link --><\/p>\n<h3><b>CUSTOM 455 (UNS S45500): An Age Hardenable, Martensitic Stainless Steel<\/b><\/h3>\n<h3><b>Alloy Definition and Chemical Composition<\/b><\/h3>\n<p class=\"p3\"><span class=\"s2\">CUSTOM 455<\/span> is an age hardenable <span class=\"s2\">stainless steel<\/span> grade with a martensitic structural characteristic. Offering properties such as high strength, good toughness and excellent corrosion resistance together, this alloy finds a broad area of use especially in the aerospace, defence and chemical processing sectors.<\/p>\n<p class=\"p3\">Especially with the <span class=\"s2\">Solution Annealing + Aging<\/span> operations, its hardness and strength can be raised to high levels. The <span class=\"s2\">martensite<\/span> and <a href=\"https:\/\/en.wikipedia.org\/wiki\/Intermetallic\">intermetallic<\/a> precipitates (especially Cu-rich phases) formed at a rate of 10\u201312% by the ageing operation provide the high mechanical values of this alloy.<\/p>\n<p class=\"p4\"><b>Its typical chemical composition (% by weight):<\/b><b><\/b><\/p>\n<ul>\n<li class=\"p1\"><span class=\"s1\"><b>Chromium (Cr):<\/b><\/span> 11.0 \u2013 12.5%<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Nickel (Ni):<\/b><\/span> 7.5 \u2013 9.5%<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Copper (Cu):<\/b><\/span> 1.5 \u2013 2.5%<\/li>\n<li class=\"p1\"><b>Titanium (Ti):<\/b><span class=\"s1\"> 0.80 \u2013 1.40%<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Carbon (C):<\/b><\/span> 0.05% max<\/li>\n<li class=\"p1\"><b>Molybdenum (Mo):<\/b><span class=\"s1\"> 0.50% max<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Iron (Fe):<\/b><\/span> Balance<\/li>\n<\/ul>\n<p class=\"p3\">The <span class=\"s2\"><b>copper and titanium<\/b><\/span> ratio in the alloy is of critical importance for the age hardening mechanism. The low carbon content, on the other hand, limits carbide precipitation at the grain boundaries and reduces the risk of cracking after welding.<\/p>\n<hr>\n<h3><b>CUSTOM 455 <\/b><b>Standards and Specifications<\/b><\/h3>\n<p class=\"p3\">CUSTOM 455 is defined in the following industry standards:<\/p>\n<ul>\n<li class=\"p1\"><span class=\"s1\"><b>ASTM A564<\/b><\/span> \u2013 General standard for age hardenable stainless steels<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>AMS 5617<\/b><\/span> \u2013 Bar, wire, forged and formed products<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>AMS 5860<\/b><\/span> \u2013 Plate and sheet products<\/li>\n<li class=\"p1\"><span class=\"s1\"><b>UNS S45500<\/b><\/span> \u2013 Unified Numbering System designation<\/li>\n<\/ul>\n<p class=\"p3\">In addition, in some applications it is also compliant with corrosion resistance related standards such as <span class=\"s2\"><b>NACE MR0175\/ISO 15156<\/b><\/span>. These standards are of importance for service especially in environments containing <span class=\"s2\"><b>hydrogen sulphide (H\u2082S)<\/b><\/span>.<\/p>\n<hr>\n<h3><b>CUSTOM 455 <\/b><b>Trade Names and Equivalent Alloys<\/b><\/h3>\n<ul>\n<li class=\"p1\"><span class=\"s1\"><b>Custom 455\u00ae<\/b><\/span> \u2013 Registered brand of Carpenter Technology<\/li>\n<li class=\"p1\"><b>455 Stainless Steel<\/b><\/li>\n<li class=\"p1\"><b><\/b><b>UNS S45500<\/b><\/li>\n<\/ul>\n<p class=\"p3\">This alloy is generally compared with <span class=\"s2\"><b>17-4 PH<\/b><\/span>. However, <span class=\"s2\"><b>Custom 455<\/b><\/span> provides higher tensile and yield strength than 17-4 PH while preserving similar corrosion resistance. In addition, 455 offers better weldability and heat treatment stability.<\/p>\n<hr>\n<h3><b>CUSTOM 455 <\/b><b>Mechanical and Physical Properties<\/b><\/h3>\n<p class=\"p3\">CUSTOM 455 offers a broad range of mechanical performance depending on the age hardening operation. These values can be adjusted by heat treatment according to the needs of the application.<\/p>\n<p class=\"p4\"><b>Typical values after solution annealing + H900 ageing:<\/b><b><\/b><\/p>\n<ul>\n<li class=\"p1\"><b>Tensile strength (UTS):<\/b><span class=\"s1\"> 1310\u20131380 MPa<\/span><\/li>\n<li class=\"p1\"><b>Yield strength (0.2%):<\/b><span class=\"s1\"> 1170\u20131240 MPa<\/span><\/li>\n<li class=\"p1\"><b>Elongation (%):<\/b><span class=\"s1\"> 10\u201312<\/span><\/li>\n<li class=\"p1\"><b>Hardness (Rockwell C):<\/b><span class=\"s1\"> RC 44\u201347<\/span><\/li>\n<li class=\"p1\"><span class=\"s1\"><b>Density:<\/b><\/span> 7.78 g\/cm\u00b3<\/li>\n<li class=\"p1\"><b>Modulus of Elasticity:<\/b><span class=\"s1\"> ~200 GPa<\/span><\/li>\n<li class=\"p1\"><b>Melting Range:<\/b><span class=\"s1\"> 1370\u20131410 \u00b0C<\/span><\/li>\n<\/ul>\n<p class=\"p3\"><span class=\"s2\">Corrosion resistance<\/span> is equivalent to that of <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/aisi-304\/\">304<\/a> type stainless steel, and it performs well in most atmospheric, chemical and marine environments.<\/p>\n<hr>\n<h3><b>Application Areas<\/b><\/h3>\n<p class=\"p3\">CUSTOM 455 is preferred in many sectors where the combination of high strength with a stainless character is required:<\/p>\n<p class=\"p1\"><b>1.Aerospace<\/b><b><\/b><\/p>\n<p class=\"p1\">#Propeller shafts, fasteners, landing gear parts<\/p>\n<p class=\"p1\"><b>2.Defence and Military Systems<\/b><b><\/b><\/p>\n<p class=\"p1\">#Rocket connection equipment, radar fasteners<\/p>\n<p class=\"p1\"><b>3.Petrochemicals<\/b><b><\/b><\/p>\n<p class=\"p1\">#Pressure valves, gasket and flange systems<\/p>\n<p class=\"p1\"><b>4.Medical Equipment<\/b><b><\/b><\/p>\n<p class=\"p1\">#Orthopaedic implants, surgical instruments<\/p>\n<p class=\"p1\"><b>5.Food Processing and Beverage Industry<\/b><b><\/b><\/p>\n<p class=\"p1\">#Corrosion resistant shafts, pumps<\/p>\n<p class=\"p1\"><b>6.Nuclear Energy<\/b><b><\/b><\/p>\n<p class=\"p1\">#Durable fittings used in reactor systems<\/p>\n<hr>\n<h3><b>Advantages<\/b><\/h3>\n<ul>\n<li class=\"p1\"><b>Age Hardenability:<\/b>High strength levels can be obtained with simple heat treatments.<\/li>\n<li class=\"p1\"><b>High Corrosion Resistance: <\/b>It is resistant to general atmospheric corrosion, including in chlorinated environments.<\/li>\n<li class=\"p1\"><b>Mechanical Strength: <\/b>Tensile strength above 1300 MPa is obtained with heat treatments such as H900 or H1000.<\/li>\n<li class=\"p1\"><b>Weldability: <\/b>It offers better welding performance than other martensitic stainless steels.<\/li>\n<li class=\"p1\"><b>Dimensional Stability: <\/b>The tendency to shape distortion and cracking after ageing is low.<\/li>\n<\/ul>\n<hr>\n<h3><b>Disadvantages<\/b><\/h3>\n<ul>\n<li class=\"p1\"><b>Drop in Toughness at Low Temperature: <\/b>Impact toughness is limited at very low temperatures.<\/li>\n<li class=\"p1\"><b>Machining Difficulties: <\/b>Its machinability in the hardened condition is poor, and cutting tool wear is rapid.<\/li>\n<li class=\"p1\"><b>Controlled Heat Treatment Requirement: <\/b>The ageing operation in particular requires precise duration and temperature control.<\/li>\n<li class=\"p1\"><b>Cost: <\/b>It is more expensive than standard ferritic or austenitic stainless steels.<\/li>\n<\/ul>\n<hr>\n<h3><b>Conclusion and Engineering Evaluation<\/b><\/h3>\n<p class=\"p3\"><span class=\"s2\"><b>CUSTOM 455<\/b><\/span> is a versatile material from an engineering point of view, bringing together mechanical strength, corrosion resistance and dimensional stability. It meets the need for a stainless steel that is both durable and machinable, especially in fields such as the <span class=\"s2\"><b>aerospace, defence and chemical process industry<\/b><\/span>.<\/p>\n<p class=\"p3\">Together with its age hardenability and good weldability, it offers a solution for a large number of engineering problems thanks to flexible, application-specific heat treatment options. However, because of its high performance, its machining and purchasing costs are relatively high.<\/p>\n<p>&nbsp;<\/p>\n<h5><span class=\"s1\"><b>#ASTMA564<\/b><\/span><br \/>\n<span class=\"s1\"><b>#AMS5617<br \/>\n#<\/b><\/span><span class=\"s1\"><b>AMS5860<br \/>\n#<\/b><\/span><span class=\"s1\"><b>UNSS45500<br \/>\n#<\/b><\/span><span class=\"s1\"><b>Custom455\u00ae<br \/>\n#<\/b><\/span><b>455Stainless Steel<br \/>\n<span class=\"s1\">#<\/span><\/b><b><\/b><b>UNSS45500<\/b><\/h5>\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 Custom 455 \u2014 to AMS 5617, AMS 5860 standards, in the dimensions and forms required. Contact us for stock availability and pricing.<\/p>\n<p><a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/contact\/\" style=\"display:inline-block;color:#ffffff;background:#24BEE5;text-decoration:none;font-weight:600;font-size:14px;padding:10px 17px;line-height:1.2;\">Request a quotation \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\/13-8ph\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">13-8 PH<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/15-5ph\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">15-5 PH<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/17-4ph-1-4542-aisi-630\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">17-4 PH<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/17-7ph\/\" style=\"color:#24BEE5;font-weight:600;text-decoration:none;\">17-7 PH<\/a>  \u00b7  <a href=\"https:\/\/www.defencemetal.com\/index.php\/en\/precipitation-hardening-steels\/\" style=\"color:#666;font-weight:600;text-decoration:none;\">Precipitation hardening steels \u2192<\/a><\/p>\n<\/div>\n<p><!-- \/dm-benzer --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Custom 455 (UNS S45500) is an age hardenable martensitic stainless steel reaching over 1300 MPa tensile strength after H900 ageing. Chemical composition, mechanical and physical properties, ASTM A564 and AMS 5617, AMS 5860 standards, comparison with 17-4 PH, aerospace, defence and medical applications.<\/p>\n","protected":false},"author":1,"featured_media":2125,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-4116","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>Custom 455 (UNS S45500) \u2014 AMS 5617 \/ AMS 5860 Stainless Steel - Defence Metal<\/title>\n<meta name=\"description\" content=\"Custom 455 (UNS S45500) is an age hardenable martensitic stainless steel reaching over 1300 MPa tensile strength after H900 ageing.\" \/>\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\/custom-455-uns-s45500-ams-5617-ams-5860-stainless-steel\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Custom 455 (UNS S45500) \u2014 AMS 5617 \/ AMS 5860 Stainless Steel - 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