{"id":1802,"date":"2025-12-11T03:49:13","date_gmt":"2025-12-11T02:49:13","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=1802"},"modified":"2026-01-30T03:04:22","modified_gmt":"2026-01-30T02:04:22","slug":"inconel-625-vs-inconel-718","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/de\/inconel-625-vs-inconel-718\/","title":{"rendered":"Inconel 625 gegen\u00fcber Inconel 718"},"content":{"rendered":"<p data-path-to-node=\"6\">Im Bereich der extremen Metallurgie, <b><a href=\"https:\/\/www.nickelcasting.com\/pt\/ligas-de-niquel\/ligas-de-niquel-inconel\/inconel-625\/\">Inconel 625<\/a><\/b> und <b><a href=\"https:\/\/www.nickelcasting.com\/pt\/ligas-de-niquel\/ligas-de-niquel-inconel\/inconel-718\/\">Inconel 718<\/a><\/b> gelten als Industriestandard f\u00fcr Superlegierungen auf Nickelbasis. Sie haben zwar eine gemeinsame Grundzusammensetzung aus Nickel und Chrom, aber ihre unterschiedlichen mikrostrukturellen Verst\u00e4rkungsmechanismen bedingen sehr unterschiedliche Anwendungen.<\/p>\n<p data-path-to-node=\"7\">For engineers and metallurgists, the choice between these two grades is rarely about &#8220;better&#8221; or &#8220;worse&#8221;\u2014it is about optimizing for <b>Korrosionsbest\u00e4ndigkeit<\/b> (625) gegen <b>mechanische Festigkeit<\/b> (718). In diesem Leitfaden werden die entscheidenden Unterschiede in der Metallurgie, der thermischen Stabilit\u00e4t und der Bearbeitbarkeit analysiert.<\/p>\n<h2 data-path-to-node=\"8\">Inconel 625 vs 718 Vergleich<\/h2>\n<p data-path-to-node=\"9\">Der grundlegende Unterschied liegt darin, wie diese Legierungen ihre Festigkeit erreichen.<\/p>\n<ul data-path-to-node=\"10\">\n<li>\n<p data-path-to-node=\"10,0,0\"><b>Inconel 625 (UNS N06625)<\/b> ist in erster Linie ein <b>fest-l\u00f6sungsgest\u00e4rkt<\/b> Legierung. Sie erh\u00e4lt ihre Festigkeit durch die Versteifungswirkung von Molybd\u00e4n (Mo) und Niob (Nb) in der Nickel-Chrom-Matrix. Sie erfordert keine aush\u00e4rtenden W\u00e4rmebehandlungen, um ihre Eigenschaften zu erreichen, und beh\u00e4lt ihre ausgezeichnete Duktilit\u00e4t und Schwei\u00dfbarkeit.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"10,1,0\"><b>Inconel 718 (UNS N07718)<\/b> ist eine <b>Ausscheidungsgeh\u00e4rtet<\/b> (aush\u00e4rtbare) Legierung. Der Zusatz von Titan (Ti) und Aluminium (Al) zusammen mit Niob erm\u00f6glicht die Bildung von Gamma Double Prime (<span class=\"math-inline\" data-math=\"\\gamma''\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">\u03b3<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">\u2032\u2032<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>) ausscheidet (<span class=\"math-inline\" data-math=\"Ni_3Nb\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">N<\/span><span class=\"mord\"><span class=\"mord mathnormal\">i<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">3<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><span class=\"mord mathnormal\">N<\/span><span class=\"mord mathnormal\">b<\/span><\/span><\/span><\/span><\/span>) w\u00e4hrend der W\u00e4rmebehandlung. Dieses Mikrogef\u00fcge sorgt f\u00fcr eine au\u00dfergew\u00f6hnlich hohe Streckgrenze.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"11\"><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-1803\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/45.jpg\" alt=\"\" width=\"1024\" height=\"572\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/45.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/45-300x168.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/45-768x429.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/45-18x10.jpg 18w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/h3>\n<h3 data-path-to-node=\"11\">Unterschiede in der chemischen Zusammensetzung<\/h3>\n<table data-path-to-node=\"12\">\n<thead>\n<tr>\n<td><strong>Element<\/strong><\/td>\n<td><strong>Inconel 625 (Gewicht %)<\/strong><\/td>\n<td><strong>Inconel 718 (Gewicht %)<\/strong><\/td>\n<td><strong>Auswirkungen auf die Leistung<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"12,1,0,0\"><b>Nickel (Ni)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,1,1,0\">~58% (Min)<\/span><\/td>\n<td><span data-path-to-node=\"12,1,2,0\">~50 &#8211; 55%<\/span><\/td>\n<td><span data-path-to-node=\"12,1,3,0\">625 hat einen h\u00f6heren Ni-Gehalt f\u00fcr bessere Korrosionsbest\u00e4ndigkeit.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"12,2,0,0\"><b>Chrom (Cr)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,2,1,0\">20 &#8211; 23%<\/span><\/td>\n<td><span data-path-to-node=\"12,2,2,0\">17 &#8211; 21%<\/span><\/td>\n<td><span data-path-to-node=\"12,2,3,0\">Beide bieten eine ausgezeichnete Oxidationsbest\u00e4ndigkeit.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"12,3,0,0\"><b>Molybd\u00e4n (Mo)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,3,1,0\"><b>8 &#8211; 10%<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,3,2,0\">2.8 &#8211; 3.3%<\/span><\/td>\n<td><span data-path-to-node=\"12,3,3,0\"><b>Hauptunterschied:<\/b> Der hohe Mo-Gehalt in 625 garantiert eine hervorragende Lochfra\u00dfbest\u00e4ndigkeit.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"12,4,0,0\"><b>Niobium (Nb)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,4,1,0\">3.15 &#8211; 4.15%<\/span><\/td>\n<td><span data-path-to-node=\"12,4,2,0\"><b>4.75 &#8211; 5.5%<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,4,3,0\">H\u00f6herer Nb-Gehalt in 718 f\u00f6rdert die Ausscheidungsh\u00e4rtung.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"12,5,0,0\"><b>Titan\/Aluminium<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,5,1,0\">&lt; 0,4%<\/span><\/td>\n<td><span data-path-to-node=\"12,5,2,0\"><b>Ti: 0,65-1,15% \/ Al: 0,2-0,8%<\/b><\/span><\/td>\n<td><span data-path-to-node=\"12,5,3,0\">Essential for 718&#8217;s age-hardening process.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Mechanische Eigenschaften (typische Raumtemperatur)<\/h3>\n<table data-path-to-node=\"14\">\n<thead>\n<tr>\n<td><strong>Eigentum<\/strong><\/td>\n<td><strong>Inconel 625 (gegl\u00fcht)<\/strong><\/td>\n<td><strong>Inconel 718 (L\u00f6sung + gealtert)<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"14,1,0,0\"><b>Streckgrenze (0,2% Offset)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"14,1,1,0\">414 &#8211; 650 MPa<\/span><\/td>\n<td><span data-path-to-node=\"14,1,2,0\"><b>1034 &#8211; 1100 MPa<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"14,2,0,0\"><b>Zugfestigkeit<\/b><\/span><\/td>\n<td><span data-path-to-node=\"14,2,1,0\">827 &#8211; 1000 MPa<\/span><\/td>\n<td><span data-path-to-node=\"14,2,2,0\"><b>1240 &#8211; 1350 MPa<\/b><\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"14,3,0,0\"><b>H\u00e4rte (Rockwell)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"14,3,1,0\">145 &#8211; 220 HB<\/span><\/td>\n<td><span data-path-to-node=\"14,3,2,0\">331 &#8211; 444 HB (36-44 HRC)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"14,4,0,0\"><b>Dehnung<\/b><\/span><\/td>\n<td><span data-path-to-node=\"14,4,1,0\">30 &#8211; 60% (High Ductility)<\/span><\/td>\n<td><span data-path-to-node=\"14,4,2,0\">12 &#8211; 21%<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p data-path-to-node=\"15\"><b>Fazit:<\/b> Wenn Ihre Anwendung strukturelle Steifigkeit unter extremer Belastung erfordert, bietet Inconel 718 eine fast doppelt so hohe Streckgrenze wie 625.<\/p>\n<h2 data-path-to-node=\"16\">Inconel 625 vs. 718 Hochtemperaturleistung<\/h2>\n<p data-path-to-node=\"17\">Defining &#8220;high temperature&#8221; is critical when choosing between these alloys, as their performance curves diverge significantly past <b>650\u00b0C (1200\u00b0F)<\/b>.<\/p>\n<h3 data-path-to-node=\"18\">1. Kriechbruch und Festigkeitsstabilit\u00e4t<\/h3>\n<p data-path-to-node=\"19\">Inconel 718 ist die erste Wahl f\u00fcr hochbelastete Anwendungen bis zu <b>700\u00b0C (1300\u00b0F)<\/b>. Innerhalb dieses Bereichs ist die <span class=\"math-inline\" data-math=\"\\gamma''\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">\u03b3<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">\u2032\u2032<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> Ausscheidungen blockieren effektiv die Versetzungsbewegung und verhindern so Kriechvorg\u00e4nge. Oberhalb von 700 \u00b0C werden diese Ausscheidungen jedoch instabil und vergr\u00f6bern sich, was zu einem schnellen Abfall der mechanischen Festigkeit f\u00fchrt.<\/p>\n<h3 data-path-to-node=\"20\">2. Oxidation und thermische Stabilit\u00e4t<\/h3>\n<p data-path-to-node=\"21\">Inconel 625 weist eine \u00fcberragende Stabilit\u00e4t bei ultrahohen Temperaturen auf (bis zu <b>982\u00b0C \/ 1800\u00b0F<\/b>). Da er auf der Verfestigung durch Mischkristalle und nicht durch Ausscheidungen beruht, hat er nicht die gleichen Vergr\u00f6berungsprobleme wie 718. F\u00fcr unbelastete oder wenig beanspruchte Bauteile, die extremer Hitze ausgesetzt sind (wie Abgaskan\u00e4le oder Fackelschornsteine), ist 625 die sicherere Option.<\/p>\n<h3 data-path-to-node=\"22\">3. K\u00e4ltetechnische Leistung<\/h3>\n<p data-path-to-node=\"23\">Beide Legierungen eignen sich hervorragend f\u00fcr die Kryotechnik, aber Inconel 718 wird h\u00e4ufig f\u00fcr kryogene Schrauben und <a href=\"https:\/\/www.nickelcasting.com\/pt\/product-forms\/fasteners\/\">Verbindungselemente<\/a> weil es auch bei Temperaturen nahe dem absoluten Nullpunkt seine hohe Zugfestigkeit beh\u00e4lt, ohne spr\u00f6de zu werden.<\/p>\n<h2 data-path-to-node=\"24\">Inconel 625 vs. 718 - Wie man w\u00e4hlt<\/h2>\n<p data-path-to-node=\"25\">Um die Beschaffungsentscheidung zu rationalisieren, sollten Sie die folgenden drei Einschr\u00e4nkungen ber\u00fccksichtigen:<\/p>\n<p data-path-to-node=\"25\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-1804\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/46.jpg\" alt=\"\" width=\"1024\" height=\"572\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/46.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/46-300x168.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/46-768x429.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2025\/12\/46-18x10.jpg 18w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h3 data-path-to-node=\"26\">Szenario A: Extreme Korrosion (Marine und Chemie)<\/h3>\n<p data-path-to-node=\"27\"><b>W\u00e4hlen Sie Inconel 625.<\/b> Der hohe Molybd\u00e4ngehalt (9%) verleiht 625 eine deutlich h\u00f6here Lochfra\u00dfbest\u00e4ndigkeit (PREN) als 718. Er ist praktisch immun gegen Chlorid-Ionen-Spannungskorrosionsrisse.<\/p>\n<ul data-path-to-node=\"28\">\n<li>\n<p data-path-to-node=\"28,0,0\"><i>Typische Anwendungen:<\/i> Unterwasserrohrleitungen, W\u00e4rmetauscher in der S\u00e4ureverarbeitung, Abgassysteme in der Schifffahrt.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"29\">Szenario B: Hohe statische\/zyklische Belastungen (Luft- und Raumfahrt und Energie)<\/h3>\n<p data-path-to-node=\"30\"><b>W\u00e4hlen Sie Inconel 718.<\/b> Wenn ein Teil hohen Drehzahlen oder Druck standhalten muss, ohne sich zu verformen, ist die Streckgrenze von 718 nicht verhandelbar.<\/p>\n<ul data-path-to-node=\"31\">\n<li>\n<p data-path-to-node=\"31,0,0\"><i>Typische Anwendungen:<\/i> Gasturbinenschaufeln, Rotoren von Turboladern, Hochdruckventile, Schubkammern von Raketentriebwerken.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"32\">Szenario C: Fabrikation und Schwei\u00dfbarkeit<\/h3>\n<p data-path-to-node=\"33\"><b>W\u00e4hlen Sie Inconel 625.<\/b> Inconel 718 is susceptible to &#8220;strain-age cracking&#8221; during post-weld heat treatment if not handled precisely. In contrast, Inconel 625 is one of the most weldable superalloys available; it is resistant to intergranular cracking and requires no post-weld aging to restore corrosion resistance.<\/p>\n<h2 data-path-to-node=\"35\">Verwandte Fragen und Antworten<\/h2>\n<p data-path-to-node=\"36\"><b>1. Welche Legierung ist schwieriger zu bearbeiten, Inconel 625 oder 718?<\/b> Inconel 718 ist im Allgemeinen schwieriger zu bearbeiten. Aufgrund seiner Ausscheidungsh\u00e4rtung h\u00e4rtet er beim Schneiden schnell aus, was im Vergleich zum gegl\u00fchten Inconel 625 zu h\u00f6heren Schnittkr\u00e4ften und k\u00fcrzeren Werkzeugstandzeiten f\u00fchrt.<\/p>\n<p data-path-to-node=\"37\"><b>2. Kann Inconel 625 als Schwei\u00dfzusatzwerkstoff f\u00fcr das Schwei\u00dfen von Inconel 718 verwendet werden?<\/b> Ja, Inconel 625-Zusatzwerkstoff (ERNiCrMo-3) wird h\u00e4ufig zum Schwei\u00dfen von Inconel 718-Bauteilen verwendet, insbesondere wenn die Schwei\u00dfnaht eine hohe Duktilit\u00e4t und Korrosionsbest\u00e4ndigkeit erfordert, um Rissbildung in der W\u00e4rmeeinflusszone (WEZ) zu verhindern.<\/p>\n<p data-path-to-node=\"38\"><b>3. Ist Inconel 718 magnetisch?<\/b> Nein, sowohl Inconel 625 als auch 718 sind nicht magnetisch. Allerdings k\u00f6nnen eine starke Kaltverformung oder bestimmte W\u00e4rmebehandlungen manchmal eine sehr geringe magnetische Permeabilit\u00e4t bewirken, aber f\u00fcr die meisten technischen Zwecke gelten sie als nicht magnetisch.<\/p>","protected":false},"excerpt":{"rendered":"<p>In the realm of extreme metallurgy, Inconel 625 and Inconel 718 stand as the industry standards for nickel-based superalloys. While they share a base composition of nickel and chromium, their distinct microstructural strengthening mechanisms dictate vastly different applications. For engineers and metallurgists, the choice between these two grades is rarely about &#8220;better&#8221; or &#8220;worse&#8221;\u2014it is [&hellip;]<\/p>","protected":false},"author":1,"featured_media":1803,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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the realm of extreme metallurgy, Inconel 625 and Inconel 718 stand as the industry standards for nickel-based superalloys. While they share a base composition of nickel and chromium, their distinct microstructural strengthening mechanisms dictate vastly different applications. For engineers and metallurgists, the choice between these two grades is rarely about &#8220;better&#8221; or &#8220;worse&#8221;\u2014it is&hellip;","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts\/1802","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/comments?post=1802"}],"version-history":[{"count":2,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts\/1802\/revisions"}],"predecessor-version":[{"id":2552,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/posts\/1802\/revisions\/2552"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/media\/1803"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/media?parent=1802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/categories?post=1802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/de\/wp-json\/wp\/v2\/tags?post=1802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}