{"id":15246,"date":"2026-03-16T00:00:09","date_gmt":"2026-03-15T16:00:09","guid":{"rendered":"https:\/\/hq-specialalloys.com\/what-do-you-know-about-inconel-718\/"},"modified":"2026-03-16T00:00:09","modified_gmt":"2026-03-15T16:00:09","slug":"what-do-you-know-about-inconel-718","status":"publish","type":"post","link":"https:\/\/www.hq-specialalloys.com\/ko\/what-do-you-know-about-inconel-718\/","title":{"rendered":"What do you know about Inconel 718"},"content":{"rendered":"<p>Inconel 718 (also known as UNS N07718 or GH4169) is a precipitation hardening nickel based high-temperature alloy. Since its development by International Nickel Corporation (INCO) in the late 1950s, it has become a core material in extreme working conditions such as aerospace and energy. Its core features and applications are as follows:<\/p>\n<p>&nbsp;<\/p>\n<h1>\u2160.Basic characteristics<\/h1>\n<p><b>Chemical composition<\/b><\/p>\n<p align=\"left\">Using nickel (50% -55%) as the matrix, chromium (17% -21%) provides oxidation resistance, iron (about 17% -21%) reduces costs, and reinforcing elements such as niobium (4.75% -5.5%), molybdenum (2.8% -3.3%), titanium (0.65% -1.15%), and aluminum (0.2% -0.8%) are added. Niobium forms the &#8220;&gamma;&#8221; phase (Ni &prop; Nb), while molybdenum\/titanium\/aluminum assists in the formation of the &#8220;&gamma;&#8221; phase (Ni &prop; (Al, Ti)), collectively forming the precipitation hardening core mechanism.<\/p>\n<p>&nbsp;<\/p>\n<p><b>Physical and mechanical properties<\/b><\/p>\n<ul>\n<li>Density: 8.19-8.24 g\/cm &sup3;, melting point: 1260-1340 \u2103;<\/li>\n<li>High strength: The tensile strength at room temperature is &ge; 1250 MPa, and it still maintains 1375-1450 MPa at 700 \u2103;<\/li>\n<li>Temperature resistance range: Long term applicable -253 \u2103 to 704 \u2103, short-term able to withstand high temperatures of 982 \u2103;<\/li>\n<li>Resistance to creep and fatigue: Excellent stability below 650 \u2103, strong resistance to cyclic loading.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h1>\u2161.Core advantages<\/h1>\n<ul>\n<li><b>\ub0b4\uc2dd\uc131:<\/b> Chromium forms a dense oxide film, which resists corrosion in acid, alkali, salt spray, and sulfide environments;<\/li>\n<li><b>Processing performance: <\/b>Supports forging, welding, and machining, with high feasibility for manufacturing complex components;<\/li>\n<li><b>Organizational stability:<\/b> Optimization of precipitation phase distribution through aging treatment (955 \u2103 solid solution+720 \u2103\/620 \u2103 two-stage aging).<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h1>\u2162.Key application areas<\/h1>\n<p><b>1. Aerospace<\/b><\/p>\n<p>Aircraft engine turbine discs, blades, combustion chambers, and rocket nozzles are resistant to high temperature and high pressure impacts.<\/p>\n<p>&nbsp;<\/p>\n<p><b>2. Energy industry<\/b><\/p>\n<p>Nuclear reactor pressure vessels and gas turbine components are suitable for radiation and creep environments.<\/p>\n<p>&nbsp;<\/p>\n<p><b>3. Petrochemical industry<\/b><\/p>\n<p>Cracking furnace pipelines, deep-sea drilling equipment, resistant to high-strength corrosive media.<\/p>\n<p>&nbsp;<\/p>\n<p><b>4. Special Scenarios<\/b><\/p>\n<p>Liquid hydrogen fuel storage tank (-253 \u2103) and seals for supercritical power generation units.<\/p>\n<h1>\u2163.Technological evolution<\/h1>\n<p align=\"left\">The new modification directions include: adding tungsten to enhance strength above 760 \u2103, optimizing fatigue resistance through laser additive manufacturing; Low cobalt variants are suitable for nuclear fusion reactor requirements.<\/p>\n<p>Inconel 718 achieves a balance between strength, corrosion resistance, and processability in extreme environments through its unique composition design and strengthening mechanism, continuously driving the development of high-end equipment.<\/p>","protected":false},"excerpt":{"rendered":"<p>Inconel 718 (also known as UNS N07718 or GH4169) is a precipitation hardening nickel based high-temperature alloy. Since its development by International Nickel Corporation (INCO) in the late 1950s, it has become a core material in extreme working conditions such as aerospace and energy&#8230;<\/p>","protected":false},"author":1,"featured_media":15245,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","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":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[639],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hq-specialalloys.com\/ko\/wp-json\/wp\/v2\/posts\/15246"}],"collection":[{"href":"https:\/\/www.hq-specialalloys.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hq-specialalloys.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hq-specialalloys.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hq-specialalloys.com\/ko\/wp-json\/wp\/v2\/comments?post=15246"}],"version-history":[{"count":0,"href":"https:\/\/www.hq-specialalloys.com\/ko\/wp-json\/wp\/v2\/posts\/15246\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hq-specialalloys.com\/ko\/wp-json\/wp\/v2\/media\/15245"}],"wp:attachment":[{"href":"https:\/\/www.hq-specialalloys.com\/ko\/wp-json\/wp\/v2\/media?parent=15246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hq-specialalloys.com\/ko\/wp-json\/wp\/v2\/categories?post=15246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hq-specialalloys.com\/ko\/wp-json\/wp\/v2\/tags?post=15246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}