{"id":1301,"date":"2022-08-08T16:35:41","date_gmt":"2022-08-08T08:35:41","guid":{"rendered":"https:\/\/limegreen-okapi-448594.hostingersite.com\/?page_id=1301"},"modified":"2026-07-27T18:21:18","modified_gmt":"2026-07-27T10:21:18","slug":"valve-chemical-composition-analysis","status":"publish","type":"page","link":"https:\/\/raymonvalve.com\/pt\/valve-chemical-composition-analysis\/","title":{"rendered":"An\u00e1lise da Composi\u00e7\u00e3o Qu\u00edmica do Material da V\u00e1lvula"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1301\" class=\"elementor elementor-1301\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3da498a2 e-con-full e-flex e-con e-parent\" data-id=\"3da498a2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-93ffbe85 elementor-widget elementor-widget-html\" data-id=\"93ffbe85\" data-element_type=\"widget\" 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.rv-actions{margin-top:22px}}.rv-topicgrid,.rv-routegrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.rv-topic,.rv-route{padding:22px;border:1px solid var(--rv-line);border-radius:12px;background:#fff}.rv-topic b,.rv-route b{display:block;color:var(--rv-blue);margin-bottom:7px}.rv-topic p,.rv-route p{margin:0;color:#667085;font-size:14px}.rv-limitgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}.rv-limit{padding:24px;border-radius:12px;background:#fff;color:#26344d}.rv-limit h3{margin:0 0 10px;color:#1f29bd;font-size:19px}.rv-limit p{margin:0;font-size:14px}.rv-trust{padding:26px;border:1px solid var(--rv-line);border-left:5px solid var(--rv-blue);border-radius:10px;background:#f8faff}.rv-trustgrid{display:grid;grid-template-columns:1fr 1fr;gap:18px 30px}.rv-trust b{display:block;color:var(--rv-ink);margin-bottom:5px}.rv-trust p{margin:0;color:#667085;font-size:14px}.rv-trustlinks{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.rv-trustlinks a{color:var(--rv-blue);font-size:13px;font-weight:800}body.page-id-1301 #content,body.page-id-1301 .site-content,body.page-id-1301 #primary,body.page-id-1301 #main,body.page-id-1301 .entry-content{margin-top:0!important;padding-top:0!important}body.page-id-1301 .site-content>.ast-container{max-width:100%!important;padding-left:0!important;padding-right:0!important}@media(max-width:980px){.rv-topicgrid,.rv-routegrid,.rv-limitgrid{grid-template-columns:1fr 1fr}}@media(max-width:640px){.rv-topicgrid,.rv-routegrid,.rv-limitgrid,.rv-trustgrid{grid-template-columns:1fr}}<\/style><main class=\"rv-cat\">\n<section class=\"rv-hero\"><div class=\"rv-wrap\"><div class=\"rv-crumb\"><a href=\"\/\">Home<\/a> \/ <a href=\"\/support\/\">Resources<\/a> \/ Valve Material Chemical Composition Analysis<\/div><div class=\"rv-kicker\" style=\"color:#f3cc18\">Material identity from heat certificate to component<\/div><h1 class=\"rv-title\">Valve Material Chemical Composition Analysis and Traceability<\/h1><p>Chemical composition analysis helps verify whether valve pressure-boundary and trim materials are consistent with a specified alloy grade, but the result is only meaningful when the test method, sampled location, surface preparation, instrument range and material traceability are controlled. A handheld positive material identification reading, a laboratory optical-emission result and a heat-ladle certificate do not answer exactly the same question. Project review should define which components require which evidence and how discrepancies will be resolved.<\/p><div class=\"rv-actions\"><a class=\"rv-btn rv-primary\" href=\"\/contact\/\">Request Technical Review<\/a><a class=\"rv-btn rv-ghost\" href=\"#technical-scope\">Open Technical Scope<\/a><\/div><div class=\"rv-pills\"><span class=\"rv-pill\">Heat traceability<\/span><span class=\"rv-pill\">PMI screening<\/span><span class=\"rv-pill\">Laboratory analysis<\/span><span class=\"rv-pill\">Component mapping<\/span><\/div><\/div><\/section>\n<section id=\"technical-scope\" class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Technical scope<\/div><h2 class=\"rv-h2\">Define what the composition check must prove<\/h2><div class=\"rv-topicgrid\"><div class=\"rv-topic\"><b>Grade identity<\/b><p>Compare measured elements with the limits in the contract material specification and edition for the claimed product form.<\/p><\/div><div class=\"rv-topic\"><b>Heat-to-component traceability<\/b><p>Connect certificate heat numbers, raw-material markings, transfer records and finished valve serial or tag.<\/p><\/div><div class=\"rv-topic\"><b>Method suitability<\/b><p>Select XRF, OES, combustion or other validated laboratory methods according to the elements and accuracy required.<\/p><\/div><div class=\"rv-topic\"><b>Sampling location<\/b><p>Choose an accessible representative area while accounting for coatings, scale, weld overlay, segregation and local repair.<\/p><\/div><div class=\"rv-topic\"><b>Instrument control<\/b><p>Verify reference materials, calibration\/standardization, range, surface condition and operator qualification.<\/p><\/div><div class=\"rv-topic\"><b>Discrepancy disposition<\/b><p>Quarantine affected parts, confirm with an agreed method and document technical review rather than averaging conflicting results.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"rv-section rv-dark\"><div class=\"rv-wrap\"><div class=\"rv-kicker\" style=\"color:#f3cc18\">Evidence matrix<\/div><h2 class=\"rv-h2\">Different composition evidence has different authority<\/h2><div class=\"rv-tablewrap\"><table class=\"rv-table\"><thead><tr><th>Evidence route<\/th><th>Best use<\/th><th>Key limitation<\/th><th>Record needed<\/th><\/tr><\/thead><tbody><tr><td>Material test certificate<\/td><td>Documents the producing heat and specified mechanical\/chemical results for the supplied product.<\/td><td>A certificate does not prove the identity of a loose component unless traceability was maintained.<\/td><td>Original or verified certificate, heat number, product form, specification, edition and supplier linkage.<\/td><\/tr><tr><td>Handheld XRF PMI<\/td><td>Rapid alloy sorting and verification of many metallic components without destructive sampling.<\/td><td>Light elements and grade distinctions may exceed instrument capability; geometry and surface condition affect readings.<\/td><td>Instrument ID, method\/procedure, reference check, component\/tag, location, readings and acceptance.<\/td><\/tr><tr><td>Portable OES<\/td><td>Field analysis including elements not reliably addressed by common XRF configurations, subject to equipment capability.<\/td><td>Leaves a small burn mark and requires controlled surface preparation, gas and safety arrangements.<\/td><td>Calibration\/standardization status, location photo, result, operator and restoration or disposition.<\/td><\/tr><tr><td>Laboratory OES\/ICP analysis<\/td><td>Higher-control quantitative composition analysis of a prepared representative sample.<\/td><td>Requires sampling that may be destructive and must preserve chain of custody.<\/td><td>Sample identity, preparation, method, laboratory report, uncertainty\/limits and authorized review.<\/td><\/tr><tr><td>Carbon\/sulfur combustion<\/td><td>Targeted determination where carbon or sulfur accuracy is important to grade verification.<\/td><td>It is not a full alloy screen and requires a representative sample.<\/td><td>Sample chain, instrument method, reference materials, result and grade comparison.<\/td><\/tr><tr><td>Weld overlay verification<\/td><td>Checks deposited alloy chemistry at defined locations after sufficient deposited thickness.<\/td><td>Dilution and depth matter; a surface reading may not represent the qualified overlay depth.<\/td><td>Weld procedure linkage, layer\/depth location, base material, readings and approved acceptance basis.<\/td><\/tr><\/tbody><\/table><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Engineering evidence<\/div><h2 class=\"rv-h2\">Build a component-level material verification plan<\/h2><div class=\"rv-routegrid\"><div class=\"rv-route\"><b>Pressure boundary<\/b><p>Body, bonnet or cover evidence should link product form and heat to the valve serial.<\/p><\/div><div class=\"rv-route\"><b>Trim and stem<\/b><p>Small high-alloy parts need identification controls that survive machining and assembly.<\/p><\/div><div class=\"rv-route\"><b>Bolting<\/b><p>Body\/bonnet bolting and external fasteners must not be grouped without their specified grades.<\/p><\/div><div class=\"rv-route\"><b>Welds and overlays<\/b><p>Base metal, filler\/consumable and deposited chemistry require separate traceability logic.<\/p><\/div><div class=\"rv-route\"><b>Soft materials<\/b><p>Elastomers, polymers and graphite need certificates or identity controls different from metal PMI.<\/p><\/div><div class=\"rv-route\"><b>Final dossier<\/b><p>The material map should show requirement, evidence, result, deviation and valve-tag relationship.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"rv-section rv-dark\"><div class=\"rv-wrap\"><div class=\"rv-kicker\" style=\"color:#f3cc18\">Technical boundaries<\/div><h2 class=\"rv-h2\">Claims and shortcuts this page does not support<\/h2><div class=\"rv-limitgrid\"><div class=\"rv-limit\"><h3>PMI is not a complete material qualification<\/h3><p>Composition alone does not establish heat treatment, microstructure, mechanical properties, hardness, corrosion performance or product-form conformity.<\/p><\/div><div class=\"rv-limit\"><h3>One reading cannot represent every component<\/h3><p>Each pressure-boundary, trim, bolting or overlay item needs a sampling plan based on project risk and traceability.<\/p><\/div><div class=\"rv-limit\"><h3>Grade acceptance must use the contract specification<\/h3><p>Do not compare measurements with an uncontrolled internet table or a different product-form\/material edition.<\/p><\/div><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Controlled workflow<\/div><h2 class=\"rv-h2\">From requirement to auditable evidence<\/h2><div class=\"rv-flow\"><div class=\"rv-step\"><b>1. Create the material map<\/b><span>List every component, required grade, product form, heat\/lot identity and evidence level.<\/span><\/div><div class=\"rv-step\"><b>2. Review certificates<\/b><span>Check issuer, specification, edition, heat, chemistry, mechanical results and purchase linkage.<\/span><\/div><div class=\"rv-step\"><b>3. Select the verification method<\/b><span>Match required elements and accuracy with controlled equipment and sampling locations.<\/span><\/div><div class=\"rv-step\"><b>4. Prepare and test<\/b><span>Remove coatings or scale as required, standardize the instrument and identify every reading.<\/span><\/div><div class=\"rv-step\"><b>5. Investigate exceptions<\/b><span>Segregate, confirm by an agreed method, assess scope and issue a documented disposition.<\/span><\/div><div class=\"rv-step\"><b>6. Close traceability<\/b><span>Link accepted results and certificates to component records, valve serials and the final index.<\/span><\/div><\/div><\/div><\/section>\n<section class=\"rv-section rv-dark\"><div class=\"rv-wrap\"><div class=\"rv-kicker\" style=\"color:#f3cc18\">Project checklist<\/div><h2 class=\"rv-h2\">Information and records to define<\/h2><div class=\"rv-check\"><div>Component\/material responsibility matrix<\/div><div>Material specification, grade, product form and edition<\/div><div>Heat\/lot marking and transfer traceability<\/div><div>Certificate authenticity and purchase-order linkage<\/div><div>Selected method and required detectable elements<\/div><div>Instrument ID, reference checks and operator qualification<\/div><div>Sampling locations, surface condition and result records<\/div><div>Nonconformance scope, confirmation method and final dossier<\/div><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Technical authority and scope<\/div><h2 class=\"rv-h2\">How this resource should be used<\/h2><div class=\"rv-trust\"><div class=\"rv-trustgrid\"><div><b>Primary search intent<\/b><p>Quality and procurement guidance for valve material chemical analysis, PMI and heat-to-component traceability\u2014not a claim that one handheld reading certifies the complete material condition.<\/p><\/div><div><b>Technical content owner<\/b><p>Raymon Valve technical content team. Final project decisions require the controlled documents and responsible engineer or quality reviewer.<\/p><\/div><div><b>Standards boundary<\/b><p>Acceptance depends on the controlled material specification, product form, test method, project PMI procedure and purchase order. This resource does not publish alloy limits or substitute for laboratory competence, calibrated equipment or responsible material-engineering review.<\/p><\/div><div><b>Review status<\/b><p>Technical scope reviewed 27 July 2026. Editions, procedures, acceptance criteria and product evidence must be reconfirmed before order.<\/p><\/div><\/div><div class=\"rv-trustlinks\"><a href=\"\/support\/\">Resource Center<\/a><a href=\"\/valve-standards\/\">Valve Standards<\/a><a href=\"\/valve-inspection\/\">Inspection &amp; Testing<\/a><a href=\"\/contact\/\">Request Technical Review<\/a><\/div><\/div><\/div><\/section>\n<section class=\"rv-section\"><div class=\"rv-wrap\"><div class=\"rv-kicker\">Frequently asked questions<\/div><h2 class=\"rv-h2\">Valve Material Chemical Composition Analysis FAQ<\/h2><div class=\"rv-faq\"><details><summary>Is PMI the same as a material test certificate?<\/summary><p>No. A certificate reports properties for an identified producing heat or lot; PMI checks the composition response of the actual component at a test location. They are complementary when traceability is important.<\/p><\/details><details><summary>Can XRF identify every valve alloy grade?<\/summary><p>No. Capability depends on instrument configuration, element range, surface condition, geometry and required grade distinction. Some elements or close grades need OES or laboratory confirmation.<\/p><\/details><details><summary>Should every valve component receive PMI?<\/summary><p>The purchase order or approved PMI plan should define component scope and sampling based on risk. Pressure-boundary, trim, bolting and overlay items may have different requirements.<\/p><\/details><details><summary>What happens if PMI and the certificate disagree?<\/summary><p>Segregate the affected material, verify identity and test conditions, confirm using the agreed referee method, investigate the traceability scope and obtain an approved disposition before use.<\/p><\/details><\/div><\/div><\/section>\n<section class=\"rv-section\" style=\"padding-top:0\"><div class=\"rv-wrap\"><div class=\"rv-cta\"><div><div class=\"rv-kicker\" style=\"color:#f3cc18\">Technical evidence review<\/div><h2>Send the requirement and the evidence you need to verify<\/h2><p>We will identify the applicable scope, missing records and approval path without inventing compliance claims.<\/p><\/div><div class=\"rv-actions\"><a class=\"rv-btn rv-primary\" href=\"\/contact\/\">Request Technical Review<\/a><\/div><\/div><\/div><\/section>\n<\/main><script type=\"application\/ld+json\">[{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/raymonvalve.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Resources\",\"item\":\"https:\/\/raymonvalve.com\/support\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Valve Material Chemical Composition Analysis\",\"item\":\"https:\/\/raymonvalve.com\/valve-chemical-composition-analysis\/\"}]},{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Is PMI the same as a material test certificate?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. A certificate reports properties for an identified producing heat or lot; PMI checks the composition response of the actual component at a test location. 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Pressure-boundary, trim, bolting and overlay items may have different requirements.\"}},{\"@type\":\"Question\",\"name\":\"What happens if PMI and the certificate disagree?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Segregate the affected material, verify identity and test conditions, confirm using the agreed referee method, investigate the traceability scope and obtain an approved disposition before use.\"}}]}]<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Chemical composition analysis helps verify whether valve pressure-boundary and trim materials are consistent with a specified alloy grade, but the result is only meaningful when the test method, sampled location, surface preparation, instrument range and material traceability are controlled.<\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"full-width","ast-site-content-layout":"full-width","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":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-1301","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/pages\/1301","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/comments?post=1301"}],"version-history":[{"count":44,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/pages\/1301\/revisions"}],"predecessor-version":[{"id":13491,"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/pages\/1301\/revisions\/13491"}],"wp:attachment":[{"href":"https:\/\/raymonvalve.com\/pt\/wp-json\/wp\/v2\/media?parent=1301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}