{"id":17317,"date":"2026-01-15T16:05:34","date_gmt":"2026-01-15T16:05:34","guid":{"rendered":"https:\/\/haynesintl.com\/alloys\/alloy-portfolio\/corrosion-resistant-alloys\/hastelloy-wr-66-2\/"},"modified":"2026-01-15T16:13:45","modified_gmt":"2026-01-15T16:13:45","slug":"hastelloy-wr-66-2","status":"publish","type":"alloys","link":"https:\/\/haynesintl.com\/en\/alloys\/alloy-portfolio\/corrosion-resistant-alloys\/hastelloy-wr-66-2\/","title":{"rendered":"HASTELLOY<sup>\u00ae<\/sup> WR-66<sup>\u2122<\/sup>"},"content":{"rendered":"\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\" id=\"h-principal-features\">Principal Features<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">We are pleased to announce the development of HASTELLOY<sup>\u00ae<\/sup> WR-66<sup>\u2122<\/sup> alloy. This alloy offers excellent resistance to sliding wear and corrosion in aqueous corrosive media, superior to most Ni- and Co-based alloys in wrought form. In the weld overlay form, the alloy possesses corrosion resistance and ductility vastly superior to commonly used Cobalt-Chromium alloys such as alloy STELLITE<sup>\u00ae<\/sup> 6, while maintaining comparable resistance to sliding wear and galling. The alloy\u2019s high ductility and ability to offer greater control of weld bead shape and thickness enables superior resistance to cracking during weld overlay deposition compared to other Co-based alloys. Valve, pump, bearing and seal applications in the oil and gas, chemical processing and power generation markets as well as consumer electronics and industrial cutting tools are among potential applications. Preliminary results from laboratory and partial mill products are given below.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Material is expected to be available for trial evaluation as manufacturing progresses. Planned product forms include sheet, plate, bar, weld wire, and powder. To see more on this alloy, visit our <a href=\"https:\/\/haynesintl.com\/en\/alloys\/technical-library\/\" target=\"_blank\" rel=\"noreferrer noopener\">technical library<\/a>. <br><br>*For more information on HASTELLOY<sup>\u00ae<\/sup> WR-66<sup>\u2122<\/sup> alloy, please contact Brandon Furr at (832) 835-4681 or <a href=\"mailto:BFurr@haynesintl.com\">BFurr@haynesintl.com<\/a>.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\" id=\"h-nominal-composition\">Nominal Composition<\/h2>\n\n\n\n<div class=\"wp-block-wpdatatables-wpdatatables-gutenberg-block\">\n<div class=\"wpdt-c row wpDataTableContainerSimpleTable wpDataTables wpDataTablesWrapper\n\"\n    >\n        <table id=\"wpdtSimpleTable-1842\"\n           style=\"border-collapse:collapse;\n                   border-spacing:0px;\"\n           class=\"wpdtSimpleTable wpDataTable\"\n           data-column=\"2\"\n           data-rows=\"12\"\n           data-wpID=\"1842\"\n           data-responsive=\"0\"\n           data-has-header=\"0\">\n\n                    <tbody>        <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-063D71 wpdt-tc-FFFFFF wpdt-bold wpdt-merged-cell \"\n                     colspan=\"2\"  rowspan=\"1\"                     data-cell-id=\"A1\"\n                    data-col-index=\"0\"\n                    data-row-index=\"0\"\n                    style=\" width:103.2967032967%;                    padding:10px;\n                    \"\n                    >\n                                        Weight %                    <\/td>\n                                                    <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A2\"\n                    data-col-index=\"0\"\n                    data-row-index=\"1\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Cobalt                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B2\"\n                    data-col-index=\"1\"\n                    data-row-index=\"1\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Balance                    <\/td>\n                                        <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A3\"\n                    data-col-index=\"0\"\n                    data-row-index=\"2\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Chromium                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B3\"\n                    data-col-index=\"1\"\n                    data-row-index=\"2\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        27                    <\/td>\n                                        <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A4\"\n                    data-col-index=\"0\"\n                    data-row-index=\"3\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Molybdenum                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B4\"\n                    data-col-index=\"1\"\n                    data-row-index=\"3\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        5                    <\/td>\n                                        <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A5\"\n                    data-col-index=\"0\"\n                    data-row-index=\"4\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Iron                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B5\"\n                    data-col-index=\"1\"\n                    data-row-index=\"4\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        3                    <\/td>\n                                        <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A6\"\n                    data-col-index=\"0\"\n                    data-row-index=\"5\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Tungsten                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B6\"\n                    data-col-index=\"1\"\n                    data-row-index=\"5\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        2.5                    <\/td>\n                                        <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A7\"\n                    data-col-index=\"0\"\n                    data-row-index=\"6\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Nickel                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B7\"\n                    data-col-index=\"1\"\n                    data-row-index=\"6\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        1                    <\/td>\n                                        <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A8\"\n                    data-col-index=\"0\"\n                    data-row-index=\"7\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Manganese                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B8\"\n                    data-col-index=\"1\"\n                    data-row-index=\"7\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        1                    <\/td>\n                                        <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A9\"\n                    data-col-index=\"0\"\n                    data-row-index=\"8\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Silicon                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B9\"\n                    data-col-index=\"1\"\n                    data-row-index=\"8\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        0.3                    <\/td>\n                                        <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A10\"\n                    data-col-index=\"0\"\n                    data-row-index=\"9\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Nitrogen                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B10\"\n                    data-col-index=\"1\"\n                    data-row-index=\"9\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        0.125                    <\/td>\n                                        <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A11\"\n                    data-col-index=\"0\"\n                    data-row-index=\"10\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Aluminum                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B11\"\n                    data-col-index=\"1\"\n                    data-row-index=\"10\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        0.1                    <\/td>\n                                        <\/tr>\n                            <tr class=\"wpdt-cell-row \" >\n                                <td class=\"wpdt-cell wpdt-bc-EEEFF1 wpdt-bold\"\n                                            data-cell-id=\"A12\"\n                    data-col-index=\"0\"\n                    data-row-index=\"11\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        Carbon                    <\/td>\n                                                <td class=\"wpdt-cell \"\n                                            data-cell-id=\"B12\"\n                    data-col-index=\"1\"\n                    data-row-index=\"11\"\n                    style=\"                    padding:10px;\n                    \"\n                    >\n                                        0.065                    <\/td>\n                                        <\/tr>\n                    <\/table>\n<\/div><style id='wpdt-custom-style-1842'>\n.wpdt-bc-063D71 { background-color: #063D71 !important;}\n.wpdt-tc-FFFFFF { color: #FFFFFF !important;}\n.wpdt-bc-EEEFF1 { background-color: #EEEFF1 !important;}\n<\/style>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\" id=\"h-corrosion-resistance\">Corrosion Resistance<\/h2>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Corrosion Rate Comparison*<\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/staging-47d3-haynesintl.wpcomstaging.com\/wp-content\/uploads\/2026\/01\/Corrosion-Rate.jpeg?w=1200&#038;ssl=1\" alt=\"\" class=\"wp-image-14476\" style=\"width:436px;height:auto\"\/><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>*STELLITE<\/em><sup>\u00ae<\/sup><em>&nbsp;6 rates Normalized to 1 (Lower is Better)<\/em><\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-wear-resistance\">Wear Resistance<\/h2>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Resistance to Sliding Wear \u2013 Wrought Alloys<\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/staging-47d3-haynesintl.wpcomstaging.com\/wp-content\/uploads\/2026\/01\/Resistance-sliding-wear.jpeg?w=1200&#038;ssl=1\" alt=\"\" class=\"wp-image-14470\"\/><\/figure>\n<\/div>\n\n\n<div style=\"height:37px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Resistance to Sliding Wear: Overlays<\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/staging-47d3-haynesintl.wpcomstaging.com\/wp-content\/uploads\/2026\/01\/Overlays.jpeg?w=1200&#038;ssl=1\" alt=\"\" class=\"wp-image-14481\"\/><\/figure>\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\" id=\"h-galling-resistance\">Galling Resistance<\/h2>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>Galling Resistance of 3-Layer Overlays: 9000 lbs Load*<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/staging-47d3-haynesintl.wpcomstaging.com\/wp-content\/uploads\/2026\/01\/RMS.jpeg?w=1200&#038;ssl=1\" alt=\"\" class=\"wp-image-14486\"\/><figcaption class=\"wp-element-caption\">*Lower values imply greater wear resistance<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/staging-47d3-haynesintl.wpcomstaging.com\/wp-content\/uploads\/2026\/01\/PV.jpeg?w=1200&#038;ssl=1\" alt=\"\" class=\"wp-image-14490\"\/><\/figure>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\" id=\"h-disclaimer\">Disclaimer<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Haynes International makes all reasonable efforts to ensure the accuracy and correctness of the data displayed on this site but makes no representations or warranties as to the data\u2019s accuracy, correctness or reliability. All data are for general information only and not for providing design advice. Alloy properties disclosed here are based on work conducted principally by Haynes International, Inc. and occasionally supplemented by information from the open literature and, as such, are indicative only of the results of such tests and should not be considered guaranteed maximums or minimums.&nbsp; It is the responsibility of the user to test specific alloys under actual service conditions to determine their suitability for a particular purpose.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For specific concentrations of elements present in a particular product and a discussion of the potential health affects thereof, refer to the Safety Data Sheets supplied by Haynes International, Inc.&nbsp; All trademarks are owned by Haynes International, Inc., unless otherwise indicated.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\" id=\"h-alloy-brochure\">Alloy Brochure<\/h2>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"http:\/\/haynesintl.com\/wp-content\/uploads\/2026\/01\/Alloy-Concept-WR-66.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Download<\/a><\/div>\n<\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Principal Features We are pleased to announce the development of HASTELLOY<sup>\u00ae<\/sup> WR-66<sup>\u2122<\/sup> alloy. This alloy offers excellent resistance to sliding wear and corrosion in aqueous corrosive media, superior to most Ni- and Co-based alloys in wrought form. In the weld overlay form, the alloy possesses corrosion resistance and ductility vastly superior to commonly used Cobalt-Chromium [\u2026]<\/p>\n","protected":false},"author":24,"featured_media":0,"parent":29,"menu_order":12,"template":"","meta":{"_acf_changed":false,"_crdt_document":"","_searchwp_excluded":"","inline_featured_image":false,"footnotes":""},"class_list":["post-17317","alloys","type-alloys","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>HASTELLOY\u00ae WR-66\u2122 - Haynes International<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/haynesintl.com\/en\/alloys\/alloy-portfolio\/corrosion-resistant-alloys\/hastelloy-wr-66-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HASTELLOY\u00ae WR-66\u2122\" \/>\n<meta property=\"og:description\" content=\"Principal Features We are pleased to announce the development of HASTELLOY\u00ae WR-66\u2122 alloy. This alloy offers excellent resistance to sliding wear and corrosion in aqueous corrosive media, superior to most Ni- and Co-based alloys in wrought form. In the weld overlay form, the alloy possesses corrosion resistance and ductility vastly superior to commonly used Cobalt-Chromium [\u2026]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/haynesintl.com\/en\/alloys\/alloy-portfolio\/corrosion-resistant-alloys\/hastelloy-wr-66-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Haynes International\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-15T16:13:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/staging-47d3-haynesintl.wpcomstaging.com\/wp-content\/uploads\/2026\/01\/Corrosion-Rate.jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/haynesintl.com\\\/en\\\/alloys\\\/alloy-portfolio\\\/corrosion-resistant-alloys\\\/hastelloy-wr-66-2\\\/\",\"url\":\"https:\\\/\\\/haynesintl.com\\\/en\\\/alloys\\\/alloy-portfolio\\\/corrosion-resistant-alloys\\\/hastelloy-wr-66-2\\\/\",\"name\":\"HASTELLOY\u00ae WR-66\u2122 - 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This alloy offers excellent resistance to sliding wear and corrosion in aqueous corrosive media, superior to most Ni- and Co-based alloys in wrought form. 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