{"id":49709,"date":"2025-05-20T06:54:51","date_gmt":"2025-05-20T06:54:51","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=49709"},"modified":"2025-07-01T06:12:08","modified_gmt":"2025-07-01T06:12:08","slug":"1-7709-%d1%81%d1%82%d0%b0%d0%bb%d1%8c-%d0%ba%d1%80%d0%b8%d1%82%d0%b8%d1%87%d0%b5%d1%81%d0%ba%d0%b0%d1%8f-%d0%b4%d0%bb%d1%8f-%d0%b2%d1%8b%d1%81%d0%be%d0%ba%d0%be%d0%bf%d1%80%d0%be%d0%b8%d0%b7%d0%b2","status":"publish","type":"post","link":"https:\/\/www.kaysuns.com\/ru\/1-7709-steel-crucial-for-high-performance-pipe-fittings\/","title":{"rendered":"\u0421\u0438\u043b\u0430 \u0437\u0430\u043a\u0443\u043f\u043e\u043a: \u041f\u043e\u0447\u0435\u043c\u0443 \u0441\u0442\u0430\u043b\u044c 1.7709 (21CrMoV5-7) \u0438\u043c\u0435\u0435\u0442 \u0440\u0435\u0448\u0430\u044e\u0449\u0435\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u0432\u044b\u0441\u043e\u043a\u043e\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0442\u0440\u0443\u0431 \u0438 \u0444\u0438\u0442\u0438\u043d\u0433\u043e\u0432"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"49709\" class=\"elementor elementor-49709\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ee6c201 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ee6c201\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b5c3d20\" data-id=\"b5c3d20\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4dba0a1 elementor-widget elementor-widget-heading\" data-id=\"4dba0a1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Understanding 1.7709 Steel<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9b0ad0c elementor-widget elementor-widget-text-editor\" data-id=\"9b0ad0c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>What exactly is 1.7709 steel? Known by its European standard designation 21CrMoV5-7, this material is a quench and tempered alloy steel. It adheres strictly to the EN 10269-2006 standard. This standard specifically covers steels for fasteners used in elevated and low temperatures. Its core strength comes from alloy elements like Chromium (Cr), <a href=\"https:\/\/www.kaysuns.com\/role-of-molybdenum-in-stainless-steel-pipes-and-fittings\/\" target=\"_blank\" rel=\"noopener\">Molybdenum<\/a> (Mo), and Vanadium (V). A controlled heat treatment process, known as quenching and tempering, optimizes its properties. It balances strength, ductility, and toughness effectively. The density of this alloy is 7.85 g\/cm\u00b3. Companies widely use this material for critical fasteners like bolts and nuts. These are vital in energy, aerospace, and heavy industries. 1.7709 performs reliably up to 540\u00b0C.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9ea7a50 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9ea7a50\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-414152b\" data-id=\"414152b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7e70274 elementor-widget elementor-widget-heading\" data-id=\"7e70274\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Core Advantages of 1.7709<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b346dd1 elementor-widget elementor-widget-accordion\" data-id=\"b346dd1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1871\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1871\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Balanced High Strength and Toughness<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1871\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1871\"><p>1.7709 steel delivers a vital combination of high tensile strength (700\u20131220 MPa) and excellent impact toughness (<span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<\/span><\/span><span class=\"base\"><span class=\"mord\">63<\/span><span class=\"mord mathnormal\">J<\/span><\/span><\/span><\/span><\/span> at room temperature). This holds true for sections up to 250 mm thick after heat treatment. This balance ensures component integrity under high loads.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1872\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1872\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Exceptional High-Temperature Reliability<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1872\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1872\"><p>For systems operating up to 540\u00b0C, 1.7709 maintains critical strength (<span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<\/span><\/span><span class=\"base\"><span class=\"mord\">350<\/span><span class=\"mord mathnormal\">MP<\/span><span class=\"mord mathnormal\">a<\/span><\/span><\/span><\/span><\/span>). It forms a dense Cr\u2082O\u2083 oxide layer on its surface. This provides significant resistance to creep and oxidation. This is crucial for long-term performance in hot environments, often found in stainless steel piping systems.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1873\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1873\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Proven Low-Temperature Resilience<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1873\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1873\"><p>Even in freezing conditions down to -40\u00b0C, 1.7709 retains significant impact strength (<span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<\/span><\/span><span class=\"base\"><span class=\"mord\">27<\/span><span class=\"mord mathnormal\">J<\/span><\/span><\/span><\/span><\/span>). This low-temperature toughness prevents brittle failure. It makes the material suitable for critical applications in diverse climates or cryogenic-adjacent systems connecting to stainless steel pipes.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1874\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1874\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Adaptable Processing for Manufacturing<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1874\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1874\"><p>Sourcing 1.7709 is easier when it works well in manufacturing. It offers good cold working properties with an annealed hardness below 197 HB. This suits precision machining and cold heading. While welding requires preheating (<span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">200\u201325<\/span><span class=\"mord\">0<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=\"mbin mtight\">\u2218<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mord mathnormal\">C<\/span><\/span><\/span><\/span><\/span>), using low-hydrogen electrodes avoids thermal cracking. This adaptability simplifies fabrication workflows.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-aee5dcb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"aee5dcb\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-fabacf6\" data-id=\"fabacf6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fdfa0d5 elementor-widget elementor-widget-heading\" data-id=\"fdfa0d5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Chemical Composition of 1.7709<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1302fe elementor-widget elementor-widget-text-editor\" data-id=\"f1302fe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table>\n<tbody>\n<tr bgcolor=\"#00a0e9\">\n<th>Element<\/th>\n<th>C<\/th>\n<th>Si<\/th>\n<th>Mn<\/th>\n<th>P<\/th>\n<th>S<\/th>\n<th>Cr<\/th>\n<th>Mo<\/th>\n<th>Ni<\/th>\n<th>V<\/th>\n<th>Cu<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Content (%)<\/td>\n<td>0.17-0.23<\/td>\n<td>\u22640.40<\/td>\n<td>0.40-0.70<\/td>\n<td>\u22640.025<\/td>\n<td>\u22640.015<\/td>\n<td>1.20-1.50<\/td>\n<td>0.60-0.80<\/td>\n<td>\u22640.30<\/td>\n<td>0.10-0.20<\/td>\n<td>\u22640.30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-39398b6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"39398b6\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9ebe9ad\" data-id=\"9ebe9ad\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b0bce62 elementor-widget elementor-widget-heading\" data-id=\"b0bce62\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Typical Applications: Where 1.7709 Fits<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3a8e542 elementor-widget elementor-widget-text-editor\" data-id=\"3a8e542\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>1.7709 steel is specified where failure is not an option. While not typically formed <em>into<\/em> pipes or standard fittings itself, its strength is indispensable for fasteners that <em>connect<\/em> high-performance stainless steel pipe and fitting systems.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c804a4 elementor-widget elementor-widget-text-editor\" data-id=\"8c804a4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li data-sourcepos=\"48:1-48:328\"><strong>Energy &amp; Power:<\/strong> High-temperature bolts and nuts made from 1.7709 are essential. They are used to connect components in gas turbines, supercritical steam systems and nuclear power plants. They can withstand temperatures up to 540\u00b0C and pressures up to 275 MPa. Important pipe connection fasteners in nuclear coolant environments.<\/li><li data-sourcepos=\"49:1-49:306\"><strong>Heavy Machinery &amp; Chemical Processing:<\/strong> 1.7709 bolts secure high-pressure reactors. They resist corrosion from sulfur and chlorine media. This reduces <a href=\"https:\/\/www.kaysuns.com\/stress-corrosion-cracking-in-stainless\/\" target=\"_blank\" rel=\"noopener\">stress corrosion cracking<\/a> risk. Components in boilers, like steam turbine rotors or connection bolts, handle significant thermal cycles and loads.<\/li><li data-sourcepos=\"50:1-51:0\"><strong>Aerospace:<\/strong> Engine fasteners require extreme reliability. 1.7709 maintains high integrity under dynamic loads. It functions across a wide temperature range (from -50\u00b0C to 540\u00b0C). These fasteners are key in complex assemblies, including fuel or hydraulic lines where specialized stainless steel tubes are often used.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4b2e462 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4b2e462\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ab9acd8\" data-id=\"ab9acd8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f2f9f1d elementor-cta--layout-image-right elementor-cta--skin-classic elementor-animated-content elementor-bg-transform elementor-bg-transform-zoom-in elementor-widget elementor-widget-call-to-action\" data-id=\"f2f9f1d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-cta\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/www.kaysuns.com\/wp-content\/uploads\/2025\/05\/1.7709-CTA.webp);\" role=\"img\" aria-label=\"1.7709-CTA\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<h2 class=\"elementor-cta__title elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tWhat We Do\t\t\t\t\t<\/h2>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__description elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tKAYSUNS provides a package solutions for piping materials such PIPES, FITTINGS, FLANGES, VALVES in stainless steel, duplex steel and alloy steel etc. We will customize the most suitable products for you. If you have any questions about our company and products, please feel free to contact us.\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__button-wrapper elementor-cta__content-item elementor-content-item \">\n\t\t\t\t\t<a class=\"elementor-cta__button elementor-button elementor-size-\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjQ2ODEzIiwidG9nZ2xlIjpmYWxzZX0%3D\">\n\t\t\t\t\t\tContact Us\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-57e3d23 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"57e3d23\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a1a4386\" data-id=\"a1a4386\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-39645d9 elementor-widget elementor-widget-heading\" data-id=\"39645d9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Heat Treatment and Processing for Quality<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7a2e4dc elementor-widget elementor-widget-text-editor\" data-id=\"7a2e4dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-sourcepos=\"54:1-54:124\">Suppliers must follow strict processes to achieve the required 1.7709 properties. The critical step is quench and tempering:<\/p><ul data-sourcepos=\"56:1-58:0\"><li data-sourcepos=\"56:1-56:144\"><strong>Quenching:<\/strong> Heating to <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">910\u201394<\/span><span class=\"mord\">0\u00b0C<\/span><\/span><\/span><\/span><\/span>\u00a0followed by oil quenching. This forms a hard martensitic structure.<\/li><li data-sourcepos=\"57:1-58:0\"><strong>Tempering:<\/strong> High-temperature reheating at <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">650\u201372<\/span><span class=\"mord\">0\u00b0C<\/span><\/span><\/span><\/span><\/span>\u00a0for at least two hours. This optimizes the strength-toughness balance.<\/li><\/ul><p data-sourcepos=\"59:1-59:302\">Proper processing ensures uniform hardness (typically <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">325<\/span><span class=\"mbin\">\u00b1<\/span><\/span><span class=\"base\"><span class=\"mord\">5<\/span><span class=\"mord mathnormal\">H<\/span><span class=\"mord mathnormal\">B<\/span><\/span><\/span><\/span><\/span>) and mechanical properties post-treatment. This validation guarantees a minimum tensile strength of 1010 MPa and a reduction of area of at least 62%. These metrics are vital for high-load fasteners.<\/p><p data-sourcepos=\"61:1-61:326\">For hot forming, starting temperatures are <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">1150\u2013120<\/span><span class=\"mord\">0\u00b0C<\/span><\/span><\/span><\/span><\/span>. Finishing must be above <span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">85<\/span><span class=\"mord\">0\u00b0C<\/span><\/span><\/span><\/span><\/span>. This avoids forming brittle phases at grain boundaries. Cold working may need intermediate annealing. 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class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Send<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/form>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Understanding 1.7709 Steel What exactly is 1.7709 steel? Known by its European standard designation 21CrMoV5-7, this material is a quench and tempered alloy steel. It adheres strictly to the EN 10269-2006 standard. This standard specifically covers steels for fasteners used in elevated and low temperatures. Its core strength comes from alloy elements like Chromium (Cr),&hellip;&nbsp;<a href=\"https:\/\/www.kaysuns.com\/ru\/1-7709-steel-crucial-for-high-performance-pipe-fittings\/\" rel=\"bookmark\">\u0427\u0438\u0442\u0430\u0442\u044c \u0434\u0430\u043b\u0435\u0435 \"<span class=\"screen-reader-text\">\u0421\u0438\u043b\u0430 \u0437\u0430\u043a\u0443\u043f\u043e\u043a: \u041f\u043e\u0447\u0435\u043c\u0443 \u0441\u0442\u0430\u043b\u044c 1.7709 (21CrMoV5-7) \u0438\u043c\u0435\u0435\u0442 \u0440\u0435\u0448\u0430\u044e\u0449\u0435\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u0432\u044b\u0441\u043e\u043a\u043e\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0442\u0440\u0443\u0431 \u0438 \u0444\u0438\u0442\u0438\u043d\u0433\u043e\u0432<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":49720,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_ti_tpc_template_sync":false,"_ti_tpc_template_id":"","footnotes":""},"categories":[316,186,51],"tags":[],"class_list":["post-49709","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-stainless-steel-knowledge","category-materials"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>1.7709 Steel:Crucial 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