{"id":8058,"date":"2026-06-25T00:01:54","date_gmt":"2026-06-24T16:01:54","guid":{"rendered":"https:\/\/osenc.com\/?p=8058"},"modified":"2026-08-26T10:45:15","modified_gmt":"2026-08-26T02:45:15","slug":"is-stainless-steel-magnetic","status":"publish","type":"post","link":"https:\/\/osenc.com\/fr\/is-stainless-steel-magnetic\/","title":{"rendered":"L\u2019acier inoxydable est-il magn\u00e9tique ?"},"content":{"rendered":"\n<!-- WordPress content block for: Is Stainless Steel Magnetic?\nImage path: https:\/\/osenc.com\/wp-content\/uploads\/2026\/08\/\nDesigned to visually match the clean technical-guide rhythm of Osenc's Is Brass Magnetic page. -->\n<style>\n.osenc-material-article{--brand:#0878be;--brand2:#075f9f;--deep:#083a5a;--ink:#17384a;--muted:#536d7a;--line:#d8e7ef;--soft:#f3f8fb;--soft2:#eaf5fb;--paper:#fff;width:100%;max-width:1180px;margin:0 auto;padding:24px 28px 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a:hover{color:var(--brand)}\n.osenc-material-article>section:not(.quick-answer):not(.faq-section){padding:0 2px}.osenc-material-article>section:not(.quick-answer):not(.cta-box)>h2{padding-bottom:11px;border-bottom:2px solid #e7f0f5}.osenc-material-article>section:not(.quick-answer):not(.cta-box)>h2:after{display:block;width:64px;height:3px;margin:11px 0 -14px;background:var(--brand);border-radius:2px;content:\"\"}\n.osenc-material-article .article-figure{overflow:hidden;border:1px solid var(--line);border-radius:10px;background:#fff;box-shadow:0 8px 24px rgba(8,58,90,.07)}.osenc-material-article .article-figure img{display:block;width:100%;height:auto;aspect-ratio:4\/3;object-fit:cover}\n.osenc-material-article .table-wrap{width:100%;margin:22px 0 24px;overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:#fff;-webkit-overflow-scrolling:touch}.osenc-material-article table{width:100%;min-width:760px;border-collapse:collapse}.osenc-material-article 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var(--line);border-radius:8px;background:#fff}.osenc-material-article .faq-item:last-child{margin-bottom:0}.osenc-material-article .faq-item h3{margin-top:0;font-size:20px}.osenc-material-article .references-list{padding-left:24px}\n.osenc-material-article .cta-box{margin-top:28px;padding:32px 34px;border-radius:10px;color:#fff;background:linear-gradient(135deg,#083a5a 0%,#075f9f 65%,#0d91ca 100%);box-shadow:0 12px 30px rgba(8,58,90,.16)}.osenc-material-article .cta-box h2,.osenc-material-article .cta-box p{color:#fff}.osenc-material-article .cta-button{display:inline-flex;min-height:46px;margin-top:8px;padding:12px 22px;align-items:center;justify-content:center;border:2px solid #fff;border-radius:6px;color:var(--brand)!important;background:#fff;font-weight:700;text-decoration:none}.osenc-material-article .cta-button:hover{color:var(--deep)!important;background:#edf8fd}\n@media(max-width:900px){.osenc-material-article{padding:22px}.osenc-material-article .toc ol{grid-template-columns:1fr}}@media(max-width:600px){.osenc-material-article{padding:16px;font-size:16px;line-height:1.66}.osenc-material-article h2{font-size:25px}.osenc-material-article h3{font-size:20px}.osenc-material-article .quick-answer,.osenc-material-article .faq-section,.osenc-material-article .cta-box,.osenc-material-article .toc{padding:23px 20px}.osenc-material-article .quick-answer h2{font-size:25px}.osenc-material-article .direct-answer{font-size:18px}.osenc-material-article .cta-button{width:100%}}\n<\/style>\n<article class=\"osenc-material-article\">\n<section class=\"quick-answer\" id=\"quick-answer\">\n<p class=\"hero-kicker\">Material Check | Stainless Steel and Magnets<\/p>\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-0\"><\/span><h2>Quick Answer: Is Stainless Steel Magnetic?<\/h2>\n<p class=\"direct-answer\">Some stainless steel is magnetic, and some is not strongly attracted to a handheld magnet.<\/p>\n<p>The answer depends mainly on the steel\u2019s metallurgical structure and processing history, not simply on whether it contains iron.<\/p>\n<p>Ferritic, martensitic, duplex, and most precipitation-hardening stainless steels normally show a clear magnetic response. Fully annealed austenitic grades such as 304 and 316 usually show little attraction, but cold working and welding can increase their local response, as summarized by the <a href=\"https:\/\/bssa.org.uk\/bssa_articles\/magnetic-properties-of-austenitic-stainless-steels\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">British Stainless Steel Association<\/a>.<\/p>\n<p>A magnet test can help screen parts, but it cannot prove that a component is 304 or 316. It also cannot predict how that component will affect pull force, magnetic-field distribution, or a magnetic assembly.<\/p>\n<\/section>\n<figure class=\"article-figure\">\n<img fetchpriority=\"high\" alt=\"Stainless steel parts and neodymium magnets arranged on an engineering inspection workbench\" decoding=\"async\" fetchpriority=\"high\" height=\"900\" loading=\"eager\" src=\"https:\/\/osenc.com\/wp-content\/uploads\/2026\/08\/osenc-is-stainless-steel-magnetic-hero-20260826.webp\" width=\"1200\"\/>\n<\/figure>\n<nav aria-label=\"On this page\" class=\"toc\">\n<p class=\"toc-title\">On This Page<\/p>\n<ol>\n<li><a href=\"#why-stainless-steel-is-magnetic\">Why is some stainless steel magnetic?<\/a><\/li>\n<li><a href=\"#magnetic-stainless-steel-types\">Which stainless steel types are magnetic?<\/a><\/li>\n<li><a href=\"#is-304-stainless-steel-magnetic\">Is 304 stainless steel magnetic?<\/a><\/li>\n<li><a href=\"#is-316-stainless-steel-magnetic\">Is 316 stainless steel magnetic?<\/a><\/li>\n<li><a href=\"#local-magnetic-response\">What can a local response tell you?<\/a><\/li>\n<li><a href=\"#identify-304-or-316-with-magnet\">Can a magnet identify 304 or 316?<\/a><\/li>\n<li><a href=\"#stainless-steel-in-magnetic-assemblies\">How can stainless steel affect an assembly?<\/a><\/li>\n<li><a href=\"#specify-and-test-stainless-steel\">How should you specify and test it?<\/a><\/li>\n<li><a href=\"#magnetic-assembly-rfq\">What should you send for review?<\/a><\/li>\n<li><a href=\"#stainless-steel-magnetism-faq\">Frequently asked questions<\/a><\/li>\n<li><a href=\"#references\">References<\/a><\/li>\n<\/ol>\n<\/nav>\n<section id=\"why-stainless-steel-is-magnetic\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-1\"><\/span><h2>Why Is Some Stainless Steel Magnetic?<\/h2>\n<p>Magnetism in stainless steel depends strongly on its crystal structure. Ferritic and martensitic structures are ferromagnetic, while a fully austenitic structure has much lower magnetic permeability.<\/p>\n<p>This is why two stainless parts with similar appearances can react differently to the same magnet. Alloy family, exact composition, heat treatment, forming, welding, casting route, and local deformation can all influence the result.<\/p>\n<figure class=\"article-figure\">\n<img loading=\"lazy\" alt=\"Technician checking local magnetic response on a stainless steel component\" decoding=\"async\" height=\"900\" loading=\"lazy\" src=\"https:\/\/osenc.com\/wp-content\/uploads\/2026\/08\/osenc-is-stainless-steel-magnetic-local-check-20260826.webp\" width=\"1200\"\/>\n<\/figure>\n<p>The <a href=\"https:\/\/bssa.org.uk\/bssa_articles\/magnetic-properties-of-austenitic-stainless-steels\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">British Stainless Steel Association<\/a> states that the relative permeability of fully annealed austenitic stainless steels is generally around 1.003 to 1.05. A value close to 1 indicates only a small response compared with strongly magnetic steels.<\/p>\n<div class=\"engineering-note\">\n<p>This is a broad reference range, not a default acceptance limit for every 304 or 316 part. A controlled requirement must define the product condition, test method, magnetic field conditions, and stage of acceptance.<\/p>\n<\/div>\n<\/section>\n<section id=\"magnetic-stainless-steel-types\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-2\"><\/span><h2>Which Types of Stainless Steel Are Magnetic?<\/h2>\n<div aria-label=\"Magnetic response of stainless steel families\" class=\"table-wrap\" role=\"region\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Stainless steel family<\/th>\n<th scope=\"col\">Common examples<\/th>\n<th scope=\"col\">Typical magnetic response<\/th>\n<th scope=\"col\">Important limitation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr><td>Austenitic<\/td><td>304, 316<\/td><td>Usually low in the fully annealed condition<\/td><td>Cold work and welding may increase local response.<\/td><\/tr>\n<tr><td>Ferritic<\/td><td>409, 430, 439<\/td><td>Magnetic<\/td><td>Response and magnetic-circuit performance still depend on the exact grade and condition.<\/td><\/tr>\n<tr><td>Martensitic<\/td><td>410, 420, 440 series<\/td><td>Magnetic<\/td><td>Heat treatment and grade affect both mechanical and magnetic behavior.<\/td><\/tr>\n<tr><td>Duplex<\/td><td>2205, 2507<\/td><td>Magnetic<\/td><td>The ferritic phase produces a clear magnetic response.<\/td><\/tr>\n<tr><td>Precipitation hardening<\/td><td>17-4 PH and other grades<\/td><td>Most are magnetic<\/td><td>Verify the exact grade and heat-treatment condition.<\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>This table is suitable for initial material screening. It is not a substitute for a purchase specification, chemical analysis, permeability test, or application-level magnetic validation.<\/p>\n<figure class=\"article-figure\">\n<img loading=\"lazy\" alt=\"Stainless steel sample forms compared with small neodymium magnets on a workshop bench\" decoding=\"async\" height=\"900\" loading=\"lazy\" src=\"https:\/\/osenc.com\/wp-content\/uploads\/2026\/08\/osenc-is-stainless-steel-magnetic-family-response-20260826.webp\" width=\"1200\"\/>\n<\/figure>\n<\/section>\n<section id=\"is-304-stainless-steel-magnetic\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-3\"><\/span><h2>Is 304 Stainless Steel Magnetic?<\/h2>\n<p>Annealed 304 stainless steel normally has low magnetic permeability and may show little attraction to a handheld magnet. However, <a href=\"https:\/\/bssa.org.uk\/bssa_articles\/effect-of-cold-work-and-heat-treatment-on-the-magnetic-permeability-of-austenitic-stainless-steels\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">cold forming can transform part of its austenitic structure into strain-induced martensite<\/a>, which increases magnetic response.<\/p>\n<p>The effect is often localized. Bent corners, deep-drawn areas, rolled threads, sheared edges, stamped features, or heavily worked surfaces may attract a magnet more noticeably than an undeformed flat area from the same part.<\/p>\n<figure class=\"article-figure\">\n<img loading=\"lazy\" alt=\"Handheld magnet checking a formed area of a stainless steel bracket\" decoding=\"async\" height=\"900\" loading=\"lazy\" src=\"https:\/\/osenc.com\/wp-content\/uploads\/2026\/08\/osenc-is-stainless-steel-magnetic-304-cold-work-check-20260826.webp\" width=\"1200\"\/>\n<\/figure>\n<p>The amount of change is not fixed. It depends on the material composition, starting condition, deformation level, temperature, and processing history. A magnetic response therefore does not automatically mean that a claimed 304 component is counterfeit or out of specification.<\/p>\n<\/section>\n<section id=\"is-316-stainless-steel-magnetic\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-4\"><\/span><h2>Is 316 Stainless Steel Magnetic?<\/h2>\n<p>Fully annealed wrought 316 stainless steel also normally has low magnetic permeability. Cold working can increase its response, although the result varies with composition and processing.<\/p>\n<p>Welding may produce a different response in the weld metal or nearby region because some austenitic weld structures retain ferrite, as explained in the <a href=\"https:\/\/bssa.org.uk\/bssa_articles\/composition-effects-on-the-magnetic-permeability-of-austenitic-stainless-steels\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">BSSA composition guidance<\/a>. This means a welded enclosure can respond differently at the seam than across its base sheet.<\/p>\n<p>A wrought 316 sheet, cold-drawn 316 wire, forged 316 fastener, and welded 316 enclosure may therefore respond differently because they have different processing histories. A cast austenitic fitting should be evaluated under its casting-grade designation rather than assumed to be wrought Type 316; the <a href=\"https:\/\/nickelinstitute.org\/en\/nickel-applications\/stainless-steel\/the-nickel-advantage\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Nickel Institute<\/a> notes that cast equivalents use different designations and modified compositions.<\/p>\n<figure class=\"article-figure\">\n<img loading=\"lazy\" alt=\"Handheld magnet checking a welded stainless steel enclosure near the weld seam\" decoding=\"async\" height=\"900\" loading=\"lazy\" src=\"https:\/\/osenc.com\/wp-content\/uploads\/2026\/08\/osenc-is-stainless-steel-magnetic-316-weld-check-20260826.webp\" width=\"1200\"\/>\n<\/figure>\n<\/section>\n<section id=\"local-magnetic-response\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-5\"><\/span><h2>What Can a Local Magnetic Response Tell You?<\/h2>\n<p>The location of the response may help identify what to investigate, but it does not provide a complete material diagnosis.<\/p>\n<div aria-label=\"Localized stainless steel magnetic response diagnosis\" class=\"table-wrap\" role=\"region\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Observation<\/th>\n<th scope=\"col\">Possible explanation<\/th>\n<th scope=\"col\">Practical next action<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr><td>More attraction at a deep-drawn corner<\/td><td>Concentrated cold deformation<\/td><td>Compare formed and undeformed areas under the same screening conditions.<\/td><\/tr>\n<tr><td>More attraction at a sheared or machined edge<\/td><td>Local deformation or altered surface condition<\/td><td>Review the cutting and finishing process; use a defined material-verification method if grade matters.<\/td><\/tr>\n<tr><td>More attraction at a rolled thread or forged head<\/td><td>Heavy local working<\/td><td>Confirm the fastener specification and manufacturing condition.<\/td><\/tr>\n<tr><td>More attraction at a weld<\/td><td>Retained ferrite or a local structural change<\/td><td>Confirm the base material, filler, welding procedure, and acceptance requirement.<\/td><\/tr>\n<tr><td>A cast fitting responds more than a wrought sheet<\/td><td>Different casting composition and ferrite balance<\/td><td>Verify the casting-grade designation rather than treating it as wrought 304 or 316.<\/td><\/tr>\n<tr><td>Noticeable attraction occurs across most of the part<\/td><td>Magnetic stainless family, extensive cold work, or material mismatch may be involved<\/td><td>Verify the material specification and processing history. Do not accept or reject the part by hand feel alone.<\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>For a repeatable screening comparison, use the same magnet, orientation, contact or distance, and inspection locations. Even then, the result remains qualitative unless the customer has defined and validated that screening method.<\/p>\n<figure class=\"article-figure\">\n<img loading=\"lazy\" alt=\"Local magnetic response inspection near a stainless steel weld and fabricated edge\" decoding=\"async\" height=\"900\" loading=\"lazy\" src=\"https:\/\/osenc.com\/wp-content\/uploads\/2026\/08\/osenc-is-stainless-steel-magnetic-weld-response-20260826.webp\" width=\"1200\"\/>\n<\/figure>\n<\/section>\n<section id=\"identify-304-or-316-with-magnet\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-6\"><\/span><h2>Can You Identify 304 or 316 With a Magnet?<\/h2>\n<p><strong>No. A handheld magnet cannot reliably distinguish 304 from 316.<\/strong><\/p>\n<p>It may help separate a softened austenitic product from a clearly magnetic stainless family, but cold-worked austenitic steel can complicate that comparison. Surface shape, thickness, magnet strength, distance, and test position also affect what the operator feels.<\/p>\n<p>When the grade matters, verify it through the purchase records and an appropriate material-identification method. <a href=\"https:\/\/bssa.org.uk\/bssa_articles\/2-on-site-methods-for-stainless-steel-grade-product-sorting\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">BSSA grade-sorting guidance<\/a> states that chemical analysis may be required for a conclusive grade decision. Depending on the method, additional analysis may also be needed to distinguish low-carbon or nitrogen-controlled variants.<\/p>\n<div class=\"engineering-note\">\n<p>A magnet test does not establish corrosion resistance, exact composition, exact relative permeability, or suitability for a magnetic assembly.<\/p>\n<\/div>\n\n<\/section>\n<section id=\"stainless-steel-in-magnetic-assemblies\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-7\"><\/span><h2>How Can Stainless Steel Affect a Magnet Assembly?<\/h2>\n<p>The right stainless steel depends on the part\u2019s function. An enclosure intended to minimize magnetic interference has a different requirement from a bracket or return-path component intended to carry magnetic flux.<\/p>\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-8\"><\/span><h3>When Low Magnetic Interference Matters<\/h3>\n<p>A low-permeability austenitic stainless steel may be appropriate when a cover, enclosure, fastener, or support should not become a strong magnetic flux path. The requirement should specify the exact grade, product form, material condition, allowed permeability or field effect, test method, measurement location, and acceptance stage.<\/p>\n<p>Do not select the material by family name alone. Forming and welding after material receipt may change the local response, so testing only the incoming flat sheet may not represent the finished component.<\/p>\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-9\"><\/span><h3>When Holding Force Matters<\/h3>\n<p>Any added nonmagnetic layer or physical separation between a magnet and its target can reduce pull force. The magnitude depends on the magnet, target material and thickness, gap, geometry, coatings, contact condition, and test setup, which are also central variables in <a href=\"https:\/\/www.kjmagnetics.com\/blog\/testing-magnet-strength\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">specialist pull-force test guidance<\/a>.<\/p>\n<p>For a useful comparison, define the magnet dimensions and magnetization direction, target material and size, target thickness, coatings or intervening layers, actual working gap, load direction, and whether the load is static, cyclic, or subject to shock.<\/p>\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-10\"><\/span><h3>When Stainless Steel Is Intended as a Return Path<\/h3>\n<p>A clear response to a handheld magnet does not prove that a stainless grade will be an efficient magnetic return-path material. Magnetic-circuit performance also depends on permeability at the relevant field, saturation flux density, coercivity, geometry, and section thickness, as outlined in this <a href=\"https:\/\/www.arnoldmagnetics.com\/wp-content\/uploads\/2017\/10\/FINAL_Tech-Library_Guides_Soft-Magnetics-Application-Guide.pdf\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">soft-magnetic materials application guide<\/a>.<\/p>\n<p>The part should be evaluated in the intended magnetic circuit. A material that attracts a magnet may still create excessive reluctance or reach saturation in the proposed geometry.<\/p>\n<figure class=\"article-figure\">\n<img loading=\"lazy\" alt=\"Stainless steel cover, magnet, and steel target arranged for magnetic assembly review\" decoding=\"async\" height=\"900\" loading=\"lazy\" src=\"https:\/\/osenc.com\/wp-content\/uploads\/2026\/08\/osenc-is-stainless-steel-magnetic-assembly-path-20260826.webp\" width=\"1200\"\/>\n<\/figure>\n<\/section>\n<section id=\"specify-and-test-stainless-steel\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-11\"><\/span><h2>How Should You Specify and Test the Stainless Component?<\/h2>\n<p>Start with the application\u2019s real goal rather than asking only whether the steel is magnetic.<\/p>\n<div aria-label=\"Stainless component specification and verification matrix\" class=\"table-wrap\" role=\"region\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Application goal<\/th>\n<th scope=\"col\">Specify<\/th>\n<th scope=\"col\">Verify<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr><td>Minimize magnetic interference<\/td><td>Grade, product form, condition, manufacturing route, maximum allowed permeability or field effect, measurement point<\/td><td>Test the relevant production stage and finished geometry when processing can change the response.<\/td><\/tr>\n<tr><td>Maintain pull force through a stainless cover<\/td><td>Cover material, thickness, coatings, actual gap, magnet and target details, load direction<\/td><td>Test a representative assembly under the intended gap and contact conditions.<\/td><\/tr>\n<tr><td>Use stainless steel as a magnetic target or return path<\/td><td>Exact grade, magnetic properties, geometry, thickness and operating field<\/td><td>Review the magnetic circuit and check for permeability and saturation limitations.<\/td><\/tr>\n<tr><td>Confirm material identity<\/td><td>Purchase specification and required grade distinction<\/td><td>Use traceability records and an appropriate material-identification method; do not rely on a magnet alone.<\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"engineering-note\">\n<p><a href=\"https:\/\/store.astm.org\/a0342_a0342m-26.html\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">ASTM A342\/A342M-26<\/a> provides methods for measuring the relative permeability of weakly magnetic materials up to a relative permeability of 6.0. Specimen geometry, selected method, and magnetic field conditions affect the result, and the standard is often applied to suitable semifinished specimens. Agree on the applicable method and acceptance stage before using it for a finished component.<\/p>\n<\/div>\n<\/section>\n<section id=\"magnetic-assembly-rfq\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-12\"><\/span><h2>What Information Should You Send for a Magnetic Assembly Review?<\/h2>\n<p>Provide the following information when stainless steel is close to a permanent magnet or forms part of the magnetic circuit:<\/p>\n<ul>\n<li>Stainless steel grade, product form, condition, and manufacturing process.<\/li>\n<li>Component drawing, wall thickness, critical dimensions, and tolerances.<\/li>\n<li>Magnet material, grade, dimensions, coating, and magnetization direction.<\/li>\n<li>Actual working gap, air spaces, coatings, adhesives, and other intervening layers.<\/li>\n<li>Target or return-path material, size, thickness, and surface condition.<\/li>\n<li>Required pull force, field level, torque, sensing result, or positioning function.<\/li>\n<li>Load direction and whether loading is static, cyclic, impact, or vibration-related.<\/li>\n<li>Required safety factor and acceptance limits.<\/li>\n<li>Operating temperature, environment, and corrosion exposure.<\/li>\n<li>Measurement method, test stage, and measurement locations.<\/li>\n<li>For low-interference designs, the maximum permitted field or disturbance at a defined point.<\/li>\n<li>Available samples and whether representative physical testing is required.<\/li>\n<\/ul>\n<figure class=\"article-figure\">\n<img loading=\"lazy\" alt=\"Magnetic assembly RFQ review with stainless steel samples, magnets, caliper, and technical drawings\" decoding=\"async\" height=\"900\" loading=\"lazy\" src=\"https:\/\/osenc.com\/wp-content\/uploads\/2026\/08\/osenc-is-stainless-steel-magnetic-rfq-review-20260826.webp\" width=\"1200\"\/>\n<\/figure>\n<p>Osenc can use these inputs to review magnet geometry, magnetization direction, working gap, target conditions, and an <a href=\"https:\/\/osenc.com\/quality-management\/\">appropriate validation approach<\/a> for a <a href=\"https:\/\/osenc.com\/custom-neodymium-magnets\/\">custom neodymium magnet<\/a> or magnetic assembly. Depending on the design risk, validation may require magnetic-field simulation or representative physical testing under the intended assembly conditions.<\/p>\n<div class=\"cta-box\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-13\"><\/span><h2>Discuss Your Magnetic Assembly<\/h2>\n<p>Send your drawing, material condition, working gap, load direction, and acceptance requirement for an engineering review.<\/p>\n<a class=\"cta-button\" href=\"https:\/\/osenc.com\/contact-us\/\">Contact Osenc<\/a>\n<\/div>\n<\/section>\n<section class=\"faq-section\" id=\"stainless-steel-magnetism-faq\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-14\"><\/span><h2>Frequently Asked Questions<\/h2>\n<div class=\"faq-item\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-15\"><\/span><h3>Is all stainless steel non-magnetic?<\/h3>\n<p>No. Ferritic, martensitic, duplex, and most precipitation-hardening stainless steels are magnetic. Fully annealed austenitic grades such as 304 and 316 usually have much lower magnetic permeability.<\/p>\n<\/div>\n<div class=\"faq-item\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-16\"><\/span><h3>Why does my 304 stainless steel attract a magnet?<\/h3>\n<p>Cold forming, bending, rolling, stamping, shearing, or other local deformation may create strain-induced martensite. Compare worked and unworked areas, then verify the material by an appropriate method if grade identity or permeability is critical.<\/p>\n<\/div>\n<div class=\"faq-item\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-17\"><\/span><h3>Is 316 stainless steel completely non-magnetic?<\/h3>\n<p>No. Annealed wrought 316 normally shows little attraction, but cold work and welding can increase its local response. Its behavior should be described by condition and process, not by grade name alone.<\/p>\n<\/div>\n<div class=\"faq-item\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-18\"><\/span><h3>Can a magnet test prove that stainless steel is 304 or 316?<\/h3>\n<p>No. A magnet is useful only for qualitative screening. Material records and suitable chemical or material-identification methods are needed for a conclusive grade decision.<\/p>\n<\/div>\n<div class=\"faq-item\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-19\"><\/span><h3>Which stainless steel should I use near a neodymium magnet?<\/h3>\n<p>That depends on whether the component should minimize magnetic interference, maintain a controlled gap, act as a target, or carry return flux. Specify the function, grade and condition, geometry, working gap, magnetic requirement, and validation method before selecting the steel.<\/p>\n<\/div>\n<\/section>\n<section id=\"references\">\n<span class=\"elementor-menu-anchor\" id=\"elementor-toc__heading-anchor-20\"><\/span><h2>References<\/h2>\n<ol class=\"references-list\">\n<li>British Stainless Steel Association, <a href=\"https:\/\/bssa.org.uk\/bssa_articles\/magnetic-properties-of-austenitic-stainless-steels\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Magnetic Properties of Austenitic Stainless Steels<\/a>.<\/li>\n<li>British Stainless Steel Association, <a href=\"https:\/\/bssa.org.uk\/bssa_articles\/composition-effects-on-the-magnetic-permeability-of-austenitic-stainless-steels\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Composition Effects on the Magnetic Permeability of Austenitic Stainless Steels<\/a>.<\/li>\n<li>British Stainless Steel Association, <a href=\"https:\/\/bssa.org.uk\/bssa_articles\/effect-of-cold-work-and-heat-treatment-on-the-magnetic-permeability-of-austenitic-stainless-steels\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Effect of Cold Work and Heat Treatment on Magnetic Permeability<\/a>.<\/li>\n<li>British Stainless Steel Association, <a href=\"https:\/\/bssa.org.uk\/bssa_articles\/2-on-site-methods-for-stainless-steel-grade-product-sorting\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">On-Site Methods for Stainless Steel Grade and Product Sorting<\/a>.<\/li>\n<li>Nickel Institute, <a href=\"https:\/\/nickelinstitute.org\/en\/nickel-applications\/stainless-steel\/the-nickel-advantage\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">The Nickel Advantage in Stainless Steel<\/a>.<\/li>\n<li>ASTM International, <a href=\"https:\/\/store.astm.org\/a0342_a0342m-26.html\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">ASTM A342\/A342M-26: Standard Test Methods for Permeability of Weakly Magnetic Materials<\/a>.<\/li>\n<li>K&amp;J Magnetics, <a href=\"https:\/\/www.kjmagnetics.com\/blog\/testing-magnet-strength\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Testing Magnet Strength<\/a>.<\/li>\n<li>Arnold Magnetic Technologies, <a href=\"https:\/\/www.arnoldmagnetics.com\/wp-content\/uploads\/2017\/10\/FINAL_Tech-Library_Guides_Soft-Magnetics-Application-Guide.pdf\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Soft Magnetic Materials Application Guide<\/a>.<\/li>\n<\/ol>\n\n<\/section>\n<\/article>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"TechArticle\",\n      \"headline\": \"Is Stainless Steel Magnetic? 304, 316, and Other Grades Explained\",\n      \"description\": \"Some stainless steel is magnetic, while fully annealed austenitic grades such as 304 and 316 usually show little attraction. 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Ferritic, martensitic, duplex, and most precipitation-hardening stainless steels [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":8039,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[],"class_list":["post-8058","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-magnet"],"_links":{"self":[{"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/posts\/8058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/comments?post=8058"}],"version-history":[{"count":1,"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/posts\/8058\/revisions"}],"predecessor-version":[{"id":8906,"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/posts\/8058\/revisions\/8906"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/media\/8039"}],"wp:attachment":[{"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/media?parent=8058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/categories?post=8058"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/osenc.com\/fr\/wp-json\/wp\/v2\/tags?post=8058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}