{"id":1698,"date":"2026-01-14T01:31:20","date_gmt":"2026-01-13T17:31:20","guid":{"rendered":"https:\/\/neosumk.com\/?p=1698"},"modified":"2026-02-13T18:55:43","modified_gmt":"2026-02-13T10:55:43","slug":"grades-of-magnets","status":"publish","type":"post","link":"https:\/\/ct.semitanker.com\/poland\/grades-of-magnets\/","title":{"rendered":"Klasy magnes\u00f3w"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Magnesy s\u0105 dost\u0119pne w r\u00f3\u017cnych klasach, co dotyczy zw\u0142aszcza magnes\u00f3w neodymowych (NdFeB). Termin \u201cklasy magnes\u00f3w\u201d zwykle odnosi si\u0119 do warto\u015bci (BH)max materia\u0142u, czyli maksymalnego iloczynu energii, b\u0119d\u0105cego kluczowym parametrem przy por\u00f3wnywaniu w\u0142a\u015bciwo\u015bci poszczeg\u00f3lnych klas magnes\u00f3w neodymowych. Klasa magnesu jest wiarygodnym wska\u017anikiem w\u0142a\u015bciwo\u015bci materia\u0142u, ale nie przek\u0142ada si\u0119 bezpo\u015brednio na si\u0142\u0119 odrywania, poniewa\u017c istotn\u0105 rol\u0119 odgrywaj\u0105 r\u00f3wnie\u017c inne czynniki, takie jak geometria i stan powierzchni.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">W praktycznych zastosowaniach najpierw wybieram klas\u0119 magnesu, a nast\u0119pnie doprecyzowuj\u0119 dob\u00f3r na podstawie jego obj\u0119to\u015bci, szczeliny powietrznej, grubo\u015bci pow\u0142oki oraz stanu powierzchni stalowej. Magnes \u201cwysokiej klasy\u201d mo\u017ce mimo to osi\u0105ga\u0107 s\u0142absze parametry, je\u017celi warunki styku r\u00f3\u017cni\u0105 si\u0119 od okre\u015blonych w normach badawczych.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Kr\u00f3tka odpowied\u017a: obja\u015bnienie klas magnes\u00f3w<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Magnesy neodymowe (NdFeB) klasyfikuje si\u0119 wed\u0142ug warto\u015bci (BH)max (maksymalnego iloczynu energii, MGOe). Wy\u017csze klasy, takie jak N42 lub <a href=\"\/poland\/n52-neodymium-magnets\/\" target=\"_blank\" rel=\"noreferrer noopener\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-theme-palette-12-color\">N52<\/mark><\/a>, oznaczaj\u0105 materia\u0142 o lepszych parametrach magnetycznych, ale rzeczywista si\u0142a odrywania zale\u017cy od takich czynnik\u00f3w jak geometria, szczelina powietrzna, grubo\u015b\u0107 pow\u0142oki i stan powierzchni stalowej (np. p\u0142aska, czysta stal w por\u00f3wnaniu z cienk\u0105 lub malowan\u0105 stal\u0105).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Je\u015bli wyst\u0119puj\u0105 oznaczenia literowe, takie jak <strong>M \/ H \/ SH \/ UH \/ EH \/ AH<\/strong>, s\u0105 to <strong>klasy temperaturowe magnes\u00f3w<\/strong>. Zwi\u0119kszaj\u0105 one przede wszystkim odporno\u015b\u0107 na <strong>nieodwracalne rozmagnesowanie<\/strong> w \u015brodowisku o wysokiej temperaturze. Z mojego do\u015bwiadczenia wynika, \u017ce temperatura jest przyczyn\u0105 nr #1 p\u00f3\u017aniejszego niezadowalaj\u0105cego dzia\u0142ania magnesu, kt\u00f3ry \u201cprzeszed\u0142 testy stanowiskowe\u201d, w rzeczywistym urz\u0105dzeniu \u2014 zw\u0142aszcza w pobli\u017cu silnik\u00f3w, w zamkni\u0119tych obudowach lub wsz\u0119dzie tam, gdzie z czasem dochodzi do kumulacji ciep\u0142a.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Czym s\u0105 klasy magnes\u00f3w?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Klasy magnes\u00f3w s\u0105 standardowym sposobem opisu <strong>poziomu parametr\u00f3w materia\u0142u<\/strong> magnesu. W przypadku magnes\u00f3w neodymowych (NdFeB) klasy s\u0105 zwykle zapisywane jako <strong>N<\/strong> + liczba dwucyfrowa, czasem z dodatkowymi literami (na przyk\u0142ad: <strong>N42SH<\/strong>).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cz\u0119ste nieporozumienie: <strong>\u201cN\u201d to konwencja nazewnictwa stosowana dla klas NdFeB<\/strong> na rynku (nie jest to jednostka fizyczna), a liczba odnosi si\u0119 do zakresu <strong>(BH)max<\/strong> , zwykle podawanego w <strong>MGOe<\/strong>. Zasadniczo wy\u017csza liczba cz\u0119sto oznacza materia\u0142 magnetyczny o wy\u017cszym maksymalnym iloczynie energii <strong>przy tej samej obj\u0119to\u015bci magnesu<\/strong>, jednak ka\u017cda klasa ma <strong>dopuszczalny zakres<\/strong>, a nie pojedyncz\u0105 sta\u0142\u0105 warto\u015b\u0107.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Z punktu widzenia zaopatrzenia i bada\u0144 \u201cklas\u0119\u201d nale\u017cy traktowa\u0107 jako zakres parametr\u00f3w materia\u0142owych, a ostateczn\u0105 decyzj\u0119 projektow\u0105 oprze\u0107 na rzeczywistych badaniach si\u0142y odrywania (lub analizie MES).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tabela klas magnes\u00f3w neodymowych<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Klasa<\/th><th>Typowy zakres (BH)max (MGOe)<\/th><th>Typowa maksymalna temperatura pracy (standard)<\/th><th>Praktyczna wskaz\u00f3wka dotycz\u0105ca doboru<\/th><\/tr><\/thead><tbody><tr><td><strong>N35<\/strong><\/td><td>33\u201335<\/td><td>\u2264 80 \u00b0C<\/td><td>Dobra klasa bazowa do zastosowa\u0144 og\u00f3lnych<\/td><\/tr><tr><td><strong>N42<\/strong><\/td><td>40\u201342<\/td><td>\u2264 80 \u00b0C<\/td><td>Najlepszy kompromis dla wi\u0119kszo\u015bci konstrukcji<\/td><\/tr><tr><td><strong>N45<\/strong><\/td><td>43\u201346<\/td><td>\u2264 80 \u00b0C<\/td><td>More strength without jumping to N52<\/td><\/tr><tr><td><strong>N52<\/strong><\/td><td>49\u201352<\/td><td>\u2264 80 \u00b0C<\/td><td>Use when space is tight and max strength matters<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Real-world note:<\/strong> This chart compares <strong>neodymium magnet grades<\/strong> by their material strength. If your product operates above ~60\u201370\u00b0C, don\u2019t just upgrade to N52\u2014choose the appropriate <strong>magnet temperature grade<\/strong> (e.g., H\/SH\/UH\/EH\/AH) to prevent irreversible loss.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2025\/07\/N42-Vs-N45-Vs-N52-magnet1.webp\" alt=\"N42 Vs N45 Vs N52 magnet2\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Choose the Right Neodymium Magnet Grade for Your Application<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When selecting the right magnet grade, it\u2019s essential to match the grade to your application. For example, if space is tight, <strong>N52<\/strong> is the best choice as it provides maximum strength in a compact form. However, for general use, <strong>N35<\/strong> lub <strong>N42<\/strong> may be more suitable. If high temperatures are involved, ensure to select a <strong>magnet temperature grade<\/strong> like <strong>N42H<\/strong> lub <strong>N52H<\/strong>, co zapewnia wi\u0119ksz\u0105 odporno\u015b\u0107 na nieodwracalne rozmagnesowanie.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Zastosowanie<\/strong><\/th><th><strong>Zalecana klasa magnesu<\/strong><\/th><th><strong>Dlaczego<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Standardowe zastosowanie, bez podwy\u017cszonej temperatury<\/td><td>N35, N42<\/td><td>Ekonomiczne rozwi\u0105zanie, dobry stosunek si\u0142y do rozmiaru<\/td><\/tr><tr><td>Ma\u0142o miejsca, wysoka si\u0142a magnetyczna<\/td><td>N52<\/td><td>Maksymalizuje si\u0142\u0119 w ograniczonej przestrzeni<\/td><\/tr><tr><td>\u015arodowisko o wysokiej temperaturze<\/td><td>N42H, N52H<\/td><td>Stabilno\u015b\u0107 temperaturowa ma kluczowe znaczenie<\/td><\/tr><tr><td>Umiarkowana temperatura i ograniczona przestrze\u0144<\/td><td>N45, N50<\/td><td>Kompromis mi\u0119dzy si\u0142\u0105 dzia\u0142ania a wymiarami odpowiedni do wi\u0119kszo\u015bci zastosowa\u0144<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Je\u015bli<\/strong> dost\u0119pna przestrze\u0144 jest ograniczona \u2192 <strong>wybierz N48\u2013N56<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Je\u015bli<\/strong> wyst\u0119puje szczelina powietrzna \u2192 <strong>najpierw zmniejsz szczelin\u0119 \/ zwi\u0119ksz powierzchni\u0119 styku<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Je\u015bli<\/strong> nie ma pewno\u015bci co do temperatury \u2192 <strong>najpierw wybierz klas\u0119 z wy\u017cszym przyrostkiem (M\/H\/SH\/UH\/EH\/AH)<\/strong> i przetestuj pr\u00f3bk\u0119.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jak czyta\u0107 tabel\u0119 klas magnes\u00f3w neodymowych<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Gdy por\u00f3wnujesz klasy magnes\u00f3w neodymowych (lub korzystasz z dowolnej <strong>tabeli klas magnes\u00f3w<\/strong>), najwi\u0119ksze znaczenie maj\u0105 trzy warto\u015bci:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1) (BH)max (maksymalny iloczyn energii, MGOe)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jest to kluczowa warto\u015b\u0107 decyduj\u0105ca o <strong>Nxx<\/strong> grades. Higher (BH)max generally means the NdFeB material can deliver more magnetic energy <strong>per unit volume<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2) Br (Remanence, typically in Tesla or Gauss)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Br reflects how much magnetic flux density the material can produce at full magnetization. In practice, higher Br often correlates with stronger surface field trends (all else equal).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3) Hcj (Intrinsic Coercivity, kOe or kA\/m)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hcj shows resistance to demagnetization\u2014especially important with <strong>heat, vibration, and opposing magnetic fields<\/strong>. In real assemblies (motors, speakers, compact mechanisms), coercivity is often the hidden limiter, not the headline grade number.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Real-world tip: even a <strong>0.2\u20131.0 mm air gap<\/strong> (paint, plating, tape, <a href=\"https:\/\/ct.semitanker.com\/poland\/rubber-coated-magnet\/\" target=\"_blank\" rel=\"noreferrer noopener\">rubber pads<\/a>, coating build) can reduce pull force more than a few grade steps. This is why I usually solve \u201cnot strong enough\u201d by <strong>reducing gap or increasing contact area<\/strong> before paying for a higher grade.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">N45 vs N52: What\u2019s the Difference?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When comparing N45 and N52 magnets, the main difference is their (BH)max range. N45 typically ranges from 43\u201346 MGOe, while N52 ranges from 49\u201352 MGOe. N52 magnets tend to be stronger in the same size and shape, but a larger N45 magnet might outperform a smaller N52 if the volume is increased. Always consider magnet grades and the contact condition when making your final selection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In my experience, I only push to <a href=\"https:\/\/ct.semitanker.com\/poland\/n52-neodymium-magnets\/\" target=\"_blank\" rel=\"noreferrer noopener\">N52<\/a> when <strong>space is truly tight<\/strong> or when I can\u2019t change the geometry. If you can increase size slightly, an <strong>N45 magnet with more volume<\/strong> can outperform a small N52 (and it may be easier to source consistently in volume production).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Practical buying tip: when comparing N45 vs N52, always look at <strong>your actual contact condition<\/strong>\u2014if you have paint, plating, rubber, or a small stand-off, your \u201cgain\u201d from N52 can be smaller than expected. (Related: <a href=\"https:\/\/ct.semitanker.com\/poland\/n35-vs-n52-magnet\/\" target=\"_blank\" rel=\"noopener\">n35 vs n52 magnet<\/a>, <a href=\"https:\/\/ct.semitanker.com\/poland\/n42-vs-n45-vs-n52-magnet\/\" target=\"_blank\" rel=\"noopener\">n45 vs n52 magnets<\/a>)<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2022\/11\/maximum-energy.webp\" alt=\"maksymalna energia\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">N50 vs N52 Magnets<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Klasa <strong>N50<\/strong> magnets are slightly lower in rated strength than <strong>N52<\/strong>, typically falling in the <strong>47\u201351 MGOe<\/strong> range. In real production, the top end of N50 can overlap with the lower end of N52 because grades are <strong>ranges<\/strong>, not single numbers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you need the most consistent \u201ctop performance\u201d within a compact design, N52 is usually the safer call. But in procurement, I\u2019ve also seen projects pick N50 when availability and cost are better\u2014then confirm performance with <strong>sample testing<\/strong> under the real air gap and steel condition.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2022\/11\/the-power-of-different-grade.webp\" alt=\"power of different grade magnets\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How Do Magnet Grades Affect Magnet Strength?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Magnet performance depends on several factors\u2014<strong>size, shape, air gap, coating thickness, and the steel surface<\/strong> the magnet contacts\u2014not just grade. Grade matters because it reflects the strength of the NdFeB material, but it does <strong>not automatically equal real holding force<\/strong> in your application.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For two magnets with the same size and shape, different grades might show an improvement of roughly <strong>10\u201320%<\/strong> under <strong>ideal pull-test conditions<\/strong> (clean, thick steel plate, near-zero air gap). In real assemblies, the performance gap often shrinks once you introduce <strong>paint, plating, rubber pads, rough surfaces, thin steel, or even a small stand-off<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A practical engineering approach I use: if the design allows it, first try to reduce the air gap or increase contact area; only then upgrade the grade. This is also why a larger N45 can easily pull harder than a smaller N52.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Powi\u0105zane: <a href=\"https:\/\/ct.semitanker.com\/poland\/how-strong-is-a-neodymium-magnet\/\" target=\"_blank\" rel=\"noopener\">How strong are neodymium magnets<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2022\/11\/force-of-differen-grade-NdFeB-magnet-1.webp\" alt=\"different grade magnet pull force\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pull Force vs Shear Force (Why Your Magnet Slides)<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Pull Force vs Shear Force: Key Differences<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Si\u0142a odrywania<\/strong>: The vertical pull force, typically stronger.<\/li>\n\n\n\n<li><strong>Shear Force<\/strong>: The lateral sliding force, usually weaker.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Shear Force is Highly Affected by Surface Friction<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Surface condition<\/strong>: Rough, coated, or rubber-padded surfaces can significantly increase friction, reducing sliding ability.<\/li>\n\n\n\n<li><strong>Roztw\u00f3r<\/strong>: You can improve performance by increasing contact area, adding friction, or using mechanical stops.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Example: Real-World Applications<\/strong>\n<ul class=\"wp-block-list\">\n<li>In actual use, if a <strong>magnet is mounted on a rough surface<\/strong>, the <strong>shear force is typically 30%\u201350% lower<\/strong> than the pull force.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pull Force vs Grade: Why Test Conditions Change Everything<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Typical Pull Force Test Setup (What Most Suppliers Use)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Steel Plate Thickness<\/strong><br>Most suppliers use <strong>standard steel plates<\/strong>, typically 5\u201310 mm thick. The thickness of the steel plate affects the <strong><a href=\"https:\/\/ct.semitanker.com\/poland\/pot-magnets\/\">pull force<\/a> test strength<\/strong>, as it changes the contact area between the magnet and the steel surface.<\/li>\n\n\n\n<li><strong>Steel Surface Condition<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Smooth steel surface<\/strong>: Generates higher contact force.<\/li>\n\n\n\n<li><strong>Rough steel surface<\/strong>: Increases friction and reduces pull force.<\/li>\n\n\n\n<li><strong>Coatings\/Paint<\/strong>: Coatings or painted layers can introduce air gaps, resulting in reduced pull force.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Air Gap (0, 0.2, 0.5, 1.0 mm)<\/strong><br><strong>Air gap<\/strong> is a key factor affecting <strong>pull force<\/strong>. Even a small air gap (0.2 mm) can significantly reduce a magnet&#8217;s actual pull force. Common air gap cases include coatings, paints, or rubber pads.<\/li>\n\n\n\n<li><strong>Contact Area and Alignment<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Larger contact area<\/strong> increases pull force, especially when the magnet has more contact area with the steel surface.<\/li>\n\n\n\n<li><strong>Alignment<\/strong>: Whether the magnet is perfectly aligned with the steel surface is another factor that influences pull force. Misalignment reduces pull force.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Pull Direction (Vertical vs Shear)<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Vertical pull<\/strong>: The most common test method, where the magnet is pulled straight up from the steel surface.<\/li>\n\n\n\n<li><strong>Shear pull<\/strong>: When the magnet is not pulled vertically, the shear force is typically lower because the friction and contact area are not optimized.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">What to Confirm from Your Supplier:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ask suppliers to provide pull force test conditions<\/strong> (including steel surface condition, air gap, pull direction, etc.).<br>When purchasing magnets, request detailed <strong>test conditions<\/strong> from your suppliers, such as the thickness of the steel plate, the surface condition, whether there&#8217;s any coating, and the direction of pull during the test.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Confirm supplier test data to ensure alignment with your real-world conditions.<\/strong><br>You can ask the supplier for <strong>real-world pull force test data<\/strong> and perform <strong>application validation<\/strong>. For example, if your application involves coatings or rough surfaces, ask the supplier for relevant test data to verify the magnet&#8217;s pull force under those conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Do all magnets use the same grade system?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">No. <strong>Ferrite, <a href=\"https:\/\/ct.semitanker.com\/poland\/smco-magnet\/\">SmCo<\/a>, and NdFeB (neodymium) magnets do not share the same grade system.<\/strong> \u201cGrades of magnets\u201d depend on the material family and the standards used\u2014typically involving <strong>(BH)max, coercivity, remanence, and temperature stability<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For NdFeB (<strong>NdFeB magnet grades<\/strong>), grades like <strong>N35 \/ N42 \/ N52<\/strong> are tied mainly to <strong>(BH)max<\/strong>, so higher grades generally mean stronger material. For SmCo (another <strong>rare earth magnet<\/strong>), grading tends to emphasize <strong>high-temperature stability and coercivity<\/strong>. For ferrite, the grade naming differs and often focuses on properties within its own standard.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2022\/11\/magnet-type-comparison.webp\" alt=\"Por\u00f3wnanie typ\u00f3w magnes\u00f3w\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In real sourcing, the safest approach is to start from your application requirements (temperature, environment, size limits, target pull force), then choose the matching magnet type and grade\u2014rather than forcing a \u201cone chart fits all\u201d approach.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2022\/11\/ferrite-and-neodymium-magnet-compare.webp\" alt=\"por\u00f3wnanie magnes\u00f3w ferrytowych i neodymowych\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">NdFeB vs SmCo vs Ferrite: Which Magnet Family to Choose?<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Materia\u0142<\/strong><\/th><th><strong>Strength (typical)<\/strong><\/th><th><strong>Temperature Resistance<\/strong><\/th><th><strong>Corrosion Resistance<\/strong><\/th><th><strong>Koszt<\/strong><\/th><th><strong>Best-fit Applications<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>NdFeB (Neodymium)<\/strong><\/td><td>High<\/td><td>Moderate (80\u2013230\u00b0C)<\/td><td>Low (needs coating)<\/td><td>Moderate<\/td><td>High-performance, compact spaces<\/td><\/tr><tr><td><strong>SmCo (Samarium Cobalt)<\/strong><\/td><td>High<\/td><td>Very High (up to 350\u00b0C)<\/td><td>High<\/td><td>High<\/td><td>High-temperature applications, aerospace<\/td><\/tr><tr><td><strong>Ferrite (Ceramic)<\/strong><\/td><td>Moderate<\/td><td>Moderate (up to 250\u00b0C)<\/td><td>Moderate<\/td><td>Low<\/td><td>Cost-effective, low-power applications<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Extra Letters On Neodymium Magnet Grades<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sometimes, neodymium magnet grades include extra letters at the end (for example: <strong>N42H, N42SH, N42UH<\/strong>). These letters mainly indicate <strong>temperature resistance<\/strong>\u2014how well the magnet can handle heat without irreversible demagnetization. Standard NdFeB magnets are commonly rated for <strong>\u2264 80 \u00b0C<\/strong>, but \u201cambient temperature\u201d is often not the real story.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In real applications, temperature is one of the most common hidden killers. I\u2019ve seen magnets that looked perfect in room-temperature pull tests lose strength quickly once installed near <strong>motor stators, brake components, heaters, or enclosed housings<\/strong> where heat builds up and can\u2019t escape. If your design has unknown heat exposure, selecting the correct <strong>magnet temperature grade<\/strong> is often more important than chasing the highest N-number.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf21\ufe0f Neodymium Magnet Temperature Grades (Suffix Letters)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Standard NdFeB magnets are commonly rated for \u2264 80\u00b0C.<\/strong> If your application runs hot (motors, enclosed housings, near heaters), choose a temperature suffix grade.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Suffix<\/th><th>Typical Max Operating Temp<\/th><th>When to Use<\/th><\/tr><\/thead><tbody><tr><td><strong>M<\/strong><\/td><td>\u2264 100\u00b0C<\/td><td>Mild heat, basic safety margin<\/td><\/tr><tr><td><strong>H<\/strong><\/td><td>\u2264 120\u00b0C<\/td><td>Warm environments near motors\/appliances<\/td><\/tr><tr><td><strong>SH<\/strong><\/td><td>\u2264 150\u00b0C<\/td><td>Higher heat, enclosed equipment, steady operation<\/td><\/tr><tr><td><strong>UH<\/strong><\/td><td>\u2264 180\u00b0C<\/td><td>High-heat industrial conditions<\/td><\/tr><tr><td><strong>EH<\/strong><\/td><td>\u2264 200\u00b0C<\/td><td>Very high heat, strict demag resistance needed<\/td><\/tr><tr><td><strong>AH<\/strong><\/td><td>\u2264 230\u00b0C<\/td><td>Extreme heat; verify by datasheet\/testing<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Practical rule I use:<\/strong> if the magnet sits near a heat source and you\u2019re not 100% sure about the real peak temperature, move up at least <strong>one temperature class<\/strong> (for example: from standard to H, or from H to SH) and validate with a quick sample test.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Note: temperature limits are typical industry guidance. Always confirm with your supplier\u2019s datasheet and test if the application is critical.<\/p>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/ct.semitanker.com\/wp-content\/uploads\/2022\/11\/temperature-of-magnet.webp\" alt=\"neodymium magnet temperature\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Does \u201cMax Operating Temp\u201d Actually Mean?<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Operating Temperature and Magnet Failure:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The temperature grade (M\/H\/SH\/UH\/EH\/AH) indicates the magnet&#8217;s <strong>maximum operating temperature<\/strong> over prolonged periods, <strong>not<\/strong> its peak temperature.<\/li>\n\n\n\n<li><strong>Continuous operating temperature<\/strong>: The maximum temperature the magnet can withstand during continuous operation.<\/li>\n\n\n\n<li><strong>Peak temperature<\/strong>: The maximum temperature the magnet can withstand for short periods before experiencing irreversible demagnetization.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How to Avoid Incorrect Temperature Grade Selection:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If the magnet is located near a heat source (such as motors, heaters, or enclosed equipment), <strong>ambient temperature may be 20\u201340\u00b0C higher than the actual surface temperature<\/strong> of the magnet.<\/li>\n\n\n\n<li>When selecting the <strong>temperature grade<\/strong>, it is advisable to choose a grade <strong>one level higher<\/strong> if unsure about the temperature conditions. If possible, conduct sample testing to confirm.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Magnet Specifications (Reference Table for NdFeB Magnet Grades)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Below is a reference table showing typical property ranges for common <strong>NdFeB magnet grades<\/strong>. When engineers use a <strong>neodymium magnet grades chart<\/strong>, the most practical columns to focus on are <strong>Br<\/strong> (remanence), <strong>Hcj<\/strong> (intrinsic coercivity), and <strong>(BH)max<\/strong> (energy product).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How I use this table in real projects:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Zastosowanie <strong>(BH)max<\/strong> to compare grade strength bands (N35 vs N42 vs N52).<\/li>\n\n\n\n<li>Check <strong>Hcj<\/strong> if heat, vibration, or opposing fields exist (this is where temperature suffix grades matter).<\/li>\n\n\n\n<li>Treat all values as <strong>ranges<\/strong> and confirm with a supplier\u2019s datasheet for the exact batch\/material system.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th rowspan=\"3\">\n<p>Materia\u0142<br>magnetization<br>grade<\/p>\n<\/th><th colspan=\"2\">Remanence<\/th><th colspan=\"4\">Koercja<\/th><th colspan=\"2\">Energy-<br>product<\/th><th rowspan=\"2\">Max.<br>temperatura<\/th><\/tr><tr><th colspan=\"2\">Br<\/th><th colspan=\"2\">bHc<\/th><th colspan=\"2\">iHc<\/th><th colspan=\"2\">(BxH)max<\/th><\/tr><tr><th>Gauss (G)<\/th><th>Tesla (T)<\/th><th>kOe<\/th><th>k\/m<\/th><th>kOe<\/th><th>k\/m<\/th><th>MGOe<\/th><th>kJ\/m\u00b3<\/th><th>\u00b0C<\/th><\/tr><tr><td>N30<\/td><td>10800-11200<\/td><td>1.08-1.12<\/td><td>9.8-10.5<\/td><td>780-836<\/td><td>\u2265 12<\/td><td>\u2265 955<\/td><td>28-30<\/td><td>223-239<\/td><td>\u2264 80<\/td><\/tr><tr><td>N33<\/td><td>11400-11700<\/td><td>1.14-1.17<\/td><td>10.3-11.0<\/td><td>820-876<\/td><td>\u2265 12<\/td><td>\u2265 955<\/td><td>31-33<\/td><td>247-263<\/td><td>\u2264 80<\/td><\/tr><tr><td>N35<\/td><td>11700-12100<\/td><td>1.17-1.21<\/td><td>10.8-11.5<\/td><td>860-915<\/td><td>\u2265 12<\/td><td>\u2265 955<\/td><td>33-35<\/td><td>263-279<\/td><td>\u2264 80<\/td><\/tr><tr><td>N38<\/td><td>12200-12600<\/td><td>1.22-1.26<\/td><td>10.8-11.5<\/td><td>860-915<\/td><td>\u2265 12<\/td><td>\u2265 955<\/td><td>36-38<\/td><td>287-303<\/td><td>\u2264 80<\/td><\/tr><tr><td>N40<\/td><td>12600-12900<\/td><td>1.26-1.29<\/td><td>10.5-12.0<\/td><td>860-955<\/td><td>\u2265 12<\/td><td>\u2265 955<\/td><td>38-40<\/td><td>303-318<\/td><td>\u2264 80<\/td><\/tr><tr><td>N42<\/td><td>12900-13200<\/td><td>1.29-1.32<\/td><td>10.8-12.0<\/td><td>860-955<\/td><td>\u2265 12<\/td><td>\u2265 955<\/td><td>40-42<\/td><td>318-334<\/td><td>\u2264 80<\/td><\/tr><tr><td>N45<\/td><td>13200-13700<\/td><td>1.32-1.37<\/td><td>10.8-12.5<\/td><td>860-995<\/td><td>\u2265 12<\/td><td>\u2265 955<\/td><td>43-45<\/td><td>342-358<\/td><td>\u2264 80<\/td><\/tr><tr><td>N48<\/td><td>13700-14200<\/td><td>1.37-1.42<\/td><td>10.8-12.5<\/td><td>860-995<\/td><td>\u2265 12<\/td><td>\u2265 955<\/td><td>45-48<\/td><td>358-382<\/td><td>\u2264 80<\/td><\/tr><tr><td>N50<\/td><td>14000-14600<\/td><td>1.40-1.46<\/td><td>10.8-12.5<\/td><td>860-995<\/td><td>\u2265 12<\/td><td>\u2265 955<\/td><td>47-51<\/td><td>374-406<\/td><td>\u2264 80<\/td><\/tr><tr><td>N52<\/td><td>14200-14700<\/td><td>1.42-1.47<\/td><td>10.8-12.5<\/td><td>860-995<\/td><td>\u2265 12<\/td><td>\u2265 955<\/td><td>48-53<\/td><td>380-422<\/td><td>\u2264 80<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The grade of a magnet is a crucial indicator of NdFeB material performance, but it\u2019s not the only factor that determines real holding strength. When choosing a neodymium magnet, I recommend starting with grade as a baseline (using a <strong>tabeli klas magnes\u00f3w<\/strong>), then verifying the final performance based on <strong>magnet size\/shape, air gap, <a href=\"https:\/\/ct.semitanker.com\/poland\/neodymium-magnet-coating\/\">coating thickness<\/a>, and the steel surface condition<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Neodymium magnets are typically much stronger than ferrite magnets, and the grade number links to the <strong>(BH)max range in MGOe<\/strong>. Finally, temperature suffix letters (<strong>M\/H\/SH\/UH\/EH\/AH<\/strong>) matter a lot in real equipment\u2014if temperature exposure is uncertain, choosing the right <strong>magnet temperature grade<\/strong> (or testing a sample under real conditions) is usually the fastest way to avoid performance surprises later.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Najcz\u0119\u015bciej zadawane pytania<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Neodymium magnet n52 strength<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"\/poland\/n52-neodymium-magnets\/\" target=\"_blank\" rel=\"noreferrer noopener\">N52 neodymium magnets<\/a> typically fall in the <strong>49\u201352 MGOe<\/strong> range for maximum energy product. In practice, N52 is one of the highest commonly available <strong>neodymium magnet grades<\/strong>, but the real holding force still depends heavily on magnet size, shape, air gap, and the steel surface condition used in testing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How are magnets rated<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Magnets are commonly rated by <strong>material type<\/strong>, <strong>grade<\/strong>, oraz <strong>measured performance<\/strong>. For NdFeB (<strong>NdFeB magnet grades<\/strong>), the grade (N35, N42, N52) mainly relates to <strong>(BH)max<\/strong>, so higher grades generally indicate stronger magnetic material <strong>at the same volume<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Real holding force is usually reported as <strong>pull force<\/strong>, but that number depends heavily on test conditions (steel thickness, surface finish, and especially air gap). Surface field can be measured in <strong>Gauss<\/strong>, and temperature rating matters because NdFeB can lose strength if overheated\u2014this is why <strong>klasy temperaturowe magnes\u00f3w<\/strong> (H\/SH\/UH\/EH\/AH) are important in many applications. In procurement, I always ask for the supplier\u2019s test condition for pull force, because \u201csame magnet\u201d can look very different under different test setups.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">N52 magnet meaning<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">An N52 magnet is a high-grade neodymium (NdFeB) magnet. The \u201c52\u201d links to its <strong>(BH)max range (about 49\u201352 MGOe)<\/strong>, which is why it appears near the top of most <strong>neodymium magnet grades charts<\/strong>. In general, a higher grade provides stronger material performance, but the real holding force still depends on magnet size, shape, and the contact conditions in your application\u2014especially air gap and the steel surface.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What is the best neodymium magnet grade for most applications?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>N52 is the best for high-performance applications<\/strong> due to its superior strength. However, <strong>N42 and N35<\/strong> are often sufficient for less demanding uses, offering a good balance between strength, cost, and availability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Does N42SH mean stronger than N52?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>No, N42SH is not stronger than N52.<\/strong> N42SH refers to the grade (N42) and temperature tolerance (SH). N52 has a higher magnetic strength, while SH indicates heat resistance up to 150\u00b0C.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Why does my magnet feel weaker after installation?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Magnets feel weaker after installation due to air gaps or material interference.<\/strong> Misalignment or non-ferrous materials between the magnet and surface can reduce the effective strength, making it feel less powerful.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What pull-force test condition should I compare?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Test pull-force on a flat, clean steel surface.<\/strong> Ensure no gaps, coatings, or debris between the magnet and steel, as these can reduce the strength measured, affecting the accuracy of the pull-force test.<\/p>","protected":false},"excerpt":{"rendered":"<p>Magnets come in various grades, especially for neodymium magnets (NdFeB). The term \u201cmagnet grades\u201d typically refers to the material&#8217;s (BH)max or maximum energy product, which is a key value for comparing the strength of neodymium magnet grades. While magnet grades are a reliable indicator of material strength, they do not directly equate to pull force, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1707,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[],"class_list":["post-1698","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-magnet"],"_links":{"self":[{"href":"https:\/\/ct.semitanker.com\/poland\/wp-json\/wp\/v2\/posts\/1698","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ct.semitanker.com\/poland\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ct.semitanker.com\/poland\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ct.semitanker.com\/poland\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ct.semitanker.com\/poland\/wp-json\/wp\/v2\/comments?post=1698"}],"version-history":[{"count":0,"href":"https:\/\/ct.semitanker.com\/poland\/wp-json\/wp\/v2\/posts\/1698\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ct.semitanker.com\/poland\/wp-json\/wp\/v2\/media\/1707"}],"wp:attachment":[{"href":"https:\/\/ct.semitanker.com\/poland\/wp-json\/wp\/v2\/media?parent=1698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ct.semitanker.com\/poland\/wp-json\/wp\/v2\/categories?post=1698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ct.semitanker.com\/poland\/wp-json\/wp\/v2\/tags?post=1698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}