{"id":12879,"date":"2026-04-21T00:53:31","date_gmt":"2026-04-21T00:53:31","guid":{"rendered":"https:\/\/hlh-js.com\/?p=12879"},"modified":"2026-04-21T00:53:31","modified_gmt":"2026-04-21T00:53:31","slug":"sandblasting-grit-size-chart-mesh-size-surface-profile-application-guide","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/de\/resource\/blog\/sandblasting-grit-size-chart-mesh-size-surface-profile-application-guide\/","title":{"rendered":"Sandblasting Grit Size Chart: Mesh Size, Surface Profile &amp; Application Guide"},"content":{"rendered":"<style>\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Barlow:wght@400;500;600;700&family=Barlow+Condensed:wght@600;700&display=swap');\n.hlh-c8*,.hlh-c8*::before,.hlh-c8*::after{box-sizing:border-box;margin:0;padding:0}\n.hlh-c8{font-family:'Barlow',sans-serif;font-size:17px;line-height:1.75;color:#1e2228;background:#fff;max-width:860px;margin:0 auto}\n.hlh-c8 h1{font-family:'Barlow 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th{background:#1a2535;color:#fff;padding:11px 13px;text-align:left;font-weight:600;white-space:nowrap;font-size:0.84rem}\n.c8-table thead th:first-child{border-radius:8px 0 0 0}\n.c8-table thead th:last-child{border-radius:0 8px 0 0}\n.c8-table tbody tr:nth-child(even){background:#f9fafb}\n.c8-table tbody td{padding:10px 13px;border-bottom:1px solid #e8ebf0;color:#2c3340;vertical-align:top}\n.c8-table tbody tr:last-child td{border-bottom:none}\n\/* Grit visual bars *\/\n.c8-bar-wrap{display:flex;align-items:center;gap:8px}\n.c8-bar-bg{width:80px;height:7px;background:#e2e6ec;border-radius:4px;overflow:hidden;flex-shrink:0}\n.c8-bar-fill{height:100%;border-radius:4px}\n.c8-bar-coarse{background:linear-gradient(90deg,#c84b0e,#f07040)}\n.c8-bar-medium{background:linear-gradient(90deg,#d4880a,#f0b040)}\n.c8-bar-fine{background:linear-gradient(90deg,#185fa5,#4090d0)}\n.c8-bar-vfine{background:linear-gradient(90deg,#1a7a40,#40b070)}\n\/* Standard cards 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ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:8px}\n.c8-related ul li a{display:flex;align-items:flex-start;gap:8px;font-size:0.88rem;font-weight:500;border-bottom:none;color:#1a2232;padding:8px 10px;border-radius:6px;background:#fff;border:1px solid #dde2ea;transition:border-color 0.2s,color 0.2s}\n.c8-related ul li a:hover{border-color:#c84b0e;color:#c84b0e}\n.c8-related ul li a span{color:#c84b0e;flex-shrink:0}\n.c8-cta-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:3rem 0 2rem}\n@media(max-width:560px){.c8-cta-pair{grid-template-columns:1fr}}\n.c8-cta{border-radius:10px;padding:1.6rem 1.8rem;display:flex;flex-direction:column}\n.c8-cta-primary{background:linear-gradient(135deg,#c84b0e,#e05c1a)}\n.c8-cta-secondary{background:#f5f7fa;border:1px solid #dde2ea}\n.c8-cta h3{font-family:'Barlow Condensed',sans-serif;font-size:1.2rem;font-weight:700;margin-bottom:0.5rem;margin-top:0}\n.c8-cta-primary h3,.c8-cta-primary p{color:#fff}\n.c8-cta-secondary h3{color:#0d1117}\n.c8-cta p{font-size:0.9rem;margin-bottom:1.2rem;flex:1}\n.c8-cta-secondary p{color:#4a5568}\n.c8-btn{display:inline-block;padding:10px 22px;border-radius:6px;font-weight:700;font-size:0.9rem;text-decoration:none;border-bottom:none!important;align-self:flex-start}\n.c8-btn-white{background:#fff;color:#c84b0e}\n.c8-btn-dark{background:#0d1117;color:#fff}\n.c8-divider{border:none;border-top:1px solid #e2e6ec;margin:2.5rem 0}\n<\/style>\n\n<div class=\"hlh-c8\">\n<div class=\"c8-hero\">\n  <p class=\"c8-company-tag\">Jiangsu Henglihong Technology Co, Ltd.<\/p>\n  <h1>Sandblasting Grit Size Chart: Mesh Size, Surface Profile &amp; Application Guide<\/h1>\n  <p class=\"c8-lead\">The definitive grit size reference for industrial abrasive blasting \u2014 covering FEPA, US Mesh, and ISO standards, particle size ranges, anchor profile depth data (Ra\/Rz) for major media types, and a full application-to-grit selection matrix across all major substrates and coating systems.<\/p>\n  <div class=\"c8-hero-meta\">\n    <span>&#128197; Updated April 2026<\/span>\n    <span>&#128338; 20 min read<\/span>\n    <span>&#9997; Henglihong Technical Editorial<\/span>\n  <\/div>\n<\/div>\n\n<nav class=\"c8-toc\" aria-label=\"Table of Contents\">\n  <div class=\"c8-toc-title\">&#9776; Table of Contents<\/div>\n  <ol>\n    <li><a href=\"#c8-basics\">Understanding Grit Size &amp; Mesh<\/a><\/li>\n    <li><a href=\"#c8-standards\">Grit Size Standards: FEPA, US Mesh &amp; ISO<\/a><\/li>\n    <li><a href=\"#c8-chart\">Master Grit Size Chart \u2014 All Major Media<\/a><\/li>\n    <li><a href=\"#c8-profile\">Surface Profile (Ra\/Rz) Explained<\/a><\/li>\n    <li><a href=\"#c8-profile-table\">Profile Depth Data by Media &amp; Grit<\/a><\/li>\n    <li><a href=\"#c8-coating\">Coating System Anchor Profile Requirements<\/a><\/li>\n    <li><a href=\"#c8-matrix\">Application-to-Grit Selection Matrix<\/a><\/li>\n    <li><a href=\"#c8-pressure\">Blast Pressure &amp; Grit Interaction<\/a><\/li>\n    <li><a href=\"#c8-faq\">H\u00e4ufig gestellte Fragen<\/a><\/li>\n  <\/ol>\n<\/nav>\n\n<section id=\"c8-basics\">\n  <h2>Understanding Grit Size &amp; Mesh: The Fundamentals<\/h2>\n  <p>Grit size \u2014 also called mesh size or mesh number \u2014 describes the physical diameter of individual abrasive particles. The term &#8220;mesh&#8221; refers to the number of openings per linear inch in a standardized testing sieve screen. An abrasive particle that passes through a sieve with 36 openings per inch but is retained on a sieve with 46 openings per inch is designated &#8220;36\/46 grit&#8221; or &#8220;F36&#8221; in the FEPA system.<\/p>\n  <p>The counterintuitive rule: <strong>higher mesh number = smaller particle<\/strong>. A sieve with 220 openings per inch has much smaller openings than one with 24 openings per inch, so F220 grit is a very fine abrasive while F24 is quite coarse. This inverse relationship confuses many buyers encountering grit specifications for the first time \u2014 once understood, it clarifies every grit chart and specification document.<\/p>\n\n  <div class=\"c8-box c8-box-blue\">\n    <div class=\"c8-box-title\">&#128203; The Practical Rule<\/div>\n    <p><strong>Higher grit number \u2192 smaller particles \u2192 smoother, finer finish \u2192 less aggressive material removal.<\/strong><br>\n    <strong>Lower grit number \u2192 larger particles \u2192 rougher profile \u2192 more aggressive material removal.<\/strong><br>\n    This relationship is consistent across all blasting abrasive specifications regardless of the media type.<\/p>\n  <\/div>\n\n  <p>This page is the companion grit-size reference to Henglihong&#8217;s complete blasting media resource hub. For the complete media-type overview and selection framework, see our <a href=\"https:\/\/hlh-js.com\/resource\/blog\/what-is-sandblasting-material-complete-guide-to-types-grit-selection\/\" target=\"_blank\" rel=\"noopener\">complete guide to sandblasting material<\/a>.<\/p>\n<\/section>\n\n<section id=\"c8-standards\">\n  <h2>Grit Size Standards: FEPA, US Mesh &amp; ISO<\/h2>\n  <p>Three primary grit sizing systems are used in international abrasive trade. Understanding the relationship between them is essential for correct specification when sourcing from different regions or comparing competing quotations.<\/p>\n\n  <div class=\"c8-std-grid\">\n    <div class=\"c8-std-card\">\n      <strong>FEPA (European, International)<\/strong>\n      <p>Federation of European Producers of Abrasives standard. F-series (F12\u2013F220) for macro blasting grits. P-series (P40\u2013P2500) for coated abrasives. Most widely used in international industrial specifications. The reference standard for aluminum oxide and silicon carbide.<\/p>\n    <\/div>\n    <div class=\"c8-std-card\">\n      <strong>US Mesh (ANSI)<\/strong>\n      <p>American National Standards Institute designation \u2014 the most common system in North American specifications. Mesh number = openings per linear inch. Not directly interchangeable with FEPA numbers \u2014 always check particle size (\u00b5m) when comparing.<\/p>\n    <\/div>\n    <div class=\"c8-std-card\">\n      <strong>ISO 11126 \/ ISO 11127<\/strong>\n      <p>International standards for metallic and non-metallic blasting abrasives respectively. Define allowable particle size distributions and tolerances. Referenced in SSPC, NACE, and ISO surface preparation specifications.<\/p>\n    <\/div>\n    <div class=\"c8-std-card\">\n      <strong>SAE (Steel Media)<\/strong>\n      <p>Society of Automotive Engineers standard for steel shot and steel grit \u2014 uses S-series (shot) and G-series (grit) with nominal diameter in fractions of an inch. Common in automotive and structural steel blasting specifications.<\/p>\n    <\/div>\n  <\/div>\n\n  <div class=\"c8-box c8-box-warn\">\n    <div class=\"c8-box-title\">&#9888; F-Grade vs. P-Grade \u2014 Critical Distinction<\/div>\n    <p>FEPA F-grade (macro grits, for blasting and bonded abrasives) and FEPA P-grade (for coated abrasives like sandpaper) use different sieving methodologies and produce different particle size distributions at nominally equivalent numbers. <strong>Always specify F-grade aluminum oxide or silicon carbide for blasting applications.<\/strong> Specifying P-grade by mistake will result in incorrect surface profiles and poor process repeatability.<\/p>\n  <\/div>\n<\/section>\n\n<section id=\"c8-chart\">\n  <h2>Master Grit Size Chart \u2014 All Major Blasting Media<\/h2>\n  <p>The chart below maps FEPA F-series grit numbers to US mesh equivalents and particle diameter ranges. These size ranges apply to aluminum oxide and silicon carbide. Steel abrasives (SAE designations) and garnet (G-series) use different but comparable size systems \u2014 see the dedicated media pages for those specifications.<\/p>\n\n  <div class=\"c8-table-wrap\">\n    <table class=\"c8-table\">\n      <thead>\n        <tr>\n          <th>FEPA Grit<\/th>\n          <th>US Mesh ~<\/th>\n          <th>Particle Diameter (\u00b5m)<\/th>\n          <th>Particle Diameter (mm)<\/th>\n          <th>Classification<\/th>\n          <th>Profile Aggression<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr>\n          <td><strong>F12<\/strong><\/td><td>#12<\/td><td>1,700\u20132,360<\/td><td>1.70\u20132.36<\/td><td>Very Coarse<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-coarse\" style=\"width:100%\"><\/div><\/div>Highest<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F16<\/strong><\/td><td>#16<\/td><td>1,180\u20131,700<\/td><td>1.18\u20131.70<\/td><td>Very Coarse<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-coarse\" style=\"width:90%\"><\/div><\/div>Very High<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F20<\/strong><\/td><td>#20<\/td><td>850\u20131,180<\/td><td>0.85\u20131.18<\/td><td>Coarse<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-coarse\" style=\"width:80%\"><\/div><\/div>Hoch<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F24<\/strong><\/td><td>#24<\/td><td>710\u2013850<\/td><td>0.71\u20130.85<\/td><td>Coarse<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-coarse\" style=\"width:72%\"><\/div><\/div>Hoch<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F30<\/strong><\/td><td>#30<\/td><td>600\u2013710<\/td><td>0.60\u20130.71<\/td><td>Coarse<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-coarse\" style=\"width:65%\"><\/div><\/div>Hoch<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F36<\/strong><\/td><td>#36<\/td><td>500\u2013600<\/td><td>0.50\u20130.60<\/td><td>Medium-Coarse<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-medium\" style=\"width:58%\"><\/div><\/div>Medium-High<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F46<\/strong><\/td><td>#46<\/td><td>355-500<\/td><td>0.355\u20130.50<\/td><td>Medium-Coarse<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-medium\" style=\"width:50%\"><\/div><\/div>Medium<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F54<\/strong><\/td><td>#54<\/td><td>300\u2013355<\/td><td>0.30\u20130.355<\/td><td>Medium<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-medium\" style=\"width:42%\"><\/div><\/div>Medium<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F60<\/strong><\/td><td>#60<\/td><td>250-300<\/td><td>0.25\u20130.30<\/td><td>Medium<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-medium\" style=\"width:36%\"><\/div><\/div>Medium<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F80<\/strong><\/td><td>#80<\/td><td>180-250<\/td><td>0.18\u20130.25<\/td><td>Medium-Fine<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-fine\" style=\"width:28%\"><\/div><\/div>Low-Medium<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F100<\/strong><\/td><td>#100<\/td><td>150\u2013180<\/td><td>0.150\u20130.18<\/td><td>Fine<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-fine\" style=\"width:22%\"><\/div><\/div>Niedrig<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F120<\/strong><\/td><td>#120<\/td><td>106-150<\/td><td>0.106\u20130.15<\/td><td>Fine<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-fine\" style=\"width:17%\"><\/div><\/div>Niedrig<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F150<\/strong><\/td><td>#150<\/td><td>75\u2013106<\/td><td>0.075\u20130.106<\/td><td>Fine<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-vfine\" style=\"width:12%\"><\/div><\/div>Sehr niedrig<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F180<\/strong><\/td><td>#180<\/td><td>63\u201375<\/td><td>0.063\u20130.075<\/td><td>Very Fine<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-vfine\" style=\"width:8%\"><\/div><\/div>Minimal<\/div><\/td>\n        <\/tr>\n        <tr>\n          <td><strong>F220<\/strong><\/td><td>#220<\/td><td>45\u201363<\/td><td>0.045\u20130.063<\/td><td>Very Fine<\/td>\n          <td><div class=\"c8-bar-wrap\"><div class=\"c8-bar-bg\"><div class=\"c8-bar-fill c8-bar-vfine\" style=\"width:5%\"><\/div><\/div>Minimal<\/div><\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n<\/section>\n\n<section id=\"c8-profile\">\n  <h2>Surface Profile (Ra\/Rz): What They Mean and Why They Matter<\/h2>\n  <p>Surface profile \u2014 also called surface roughness or anchor profile \u2014 is the three-dimensional texture created on a substrate surface by abrasive blasting. It is the single most important surface characteristic for determining coating adhesion quality in industrial protective coating systems.<\/p>\n\n  <h3>Ra (Average Roughness)<\/h3>\n  <p>Ra is the arithmetic mean of the absolute deviations of the surface profile from the mean line, measured in micrometers (\u00b5m) or microinches (\u00b5in). It is the most commonly specified surface roughness parameter in coating specifications and ISO\/SSPC surface preparation standards. A higher Ra value means a rougher, more deeply profiled surface.<\/p>\n\n  <h3>Rz (Ten-Point Mean Roughness)<\/h3>\n  <p>Rz is the average vertical distance between the five highest peaks and five lowest valleys in the measurement sample length. It better captures the extreme peaks and valleys of an angular abrasive profile \u2014 values typically run 5\u20137 times higher than Ra on the same surface. Some coating manufacturers specify Rz rather than Ra because it better represents the &#8220;worst case&#8221; peaks that could puncture thin coating films or remain exposed above the coating surface.<\/p>\n\n  <h3>Practical Measurement<\/h3>\n  <p>Surface profile is measured using a surface profilometer (contact or optical), a Testex Press-O-Film replica tape (for field measurement), or a Surtronic\/Mitutoyo portable roughness gauge. Always measure actual profile on test panels before proceeding to production blasting \u2014 the profile values in grit charts are representative guidelines, not guaranteed results. Variables including blast pressure, nozzle-to-surface distance, blast angle, media condition, and substrate hardness all affect the actual profile produced.<\/p>\n<\/section>\n\n<section id=\"c8-profile-table\">\n  <h2>Surface Profile Data by Media Type &amp; Grit<\/h2>\n  <p>The table below provides representative Ra and Rz values achievable on carbon steel (approximately 200 HB hardness) at standard production blast parameters (80\u201390 PSI, perpendicular angle, 6\u20138 inch standoff distance). Actual values will vary with operating conditions.<\/p>\n\n  <div class=\"c8-table-wrap\">\n    <table class=\"c8-table\">\n      <thead>\n        <tr>\n          <th>Medienart<\/th>\n          <th>Grit \/ Size<\/th>\n          <th>Ra (\u00b5m)<\/th>\n          <th>Rz (\u00b5m)<\/th>\n          <th>SSPC Profile Grade<\/th>\n          <th>Typical Coating Suitability<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td rowspan=\"4\"><strong>Aluminum Oxide (Angular)<\/strong><\/td><td>F16\u2013F24<\/td><td>50\u201375<\/td><td>100\u2013150<\/td><td>Very Rough<\/td><td>Heavy-duty epoxy, thermal spray base coat<\/td><\/tr>\n        <tr><td>F36\u2013F46<\/td><td>25\u201350<\/td><td>60\u2013100<\/td><td>Rough<\/td><td>Zinc-rich primer, high-build epoxy, FBE<\/td><\/tr>\n        <tr><td>F60\u2013F80<\/td><td>12\u201325<\/td><td>30\u201360<\/td><td>Medium<\/td><td>Industrial primers, powder coatings<\/td><\/tr>\n        <tr><td>F100\u2013F150<\/td><td>5\u201312<\/td><td>12\u201330<\/td><td>Fine<\/td><td>Thin-film coatings, automotive primer<\/td><\/tr>\n        <tr><td rowspan=\"3\"><strong>Steel Grit (Angular)<\/strong><\/td><td>G25 \/ GH<\/td><td>30\u201350<\/td><td>80\u2013130<\/td><td>Rough<\/td><td>Heavy protective coatings, offshore<\/td><\/tr>\n        <tr><td>G40 \/ GL<\/td><td>18\u201332<\/td><td>50\u201390<\/td><td>Medium<\/td><td>Industrial epoxy, FBE pipeline<\/td><\/tr>\n        <tr><td>G80 \/ GP<\/td><td>10\u201320<\/td><td>25\u201355<\/td><td>Medium-Fine<\/td><td>General industrial coatings<\/td><\/tr>\n        <tr><td rowspan=\"2\"><strong>Steel Shot (Round)<\/strong><\/td><td>S-550\u2013S-660<\/td><td>8\u201315<\/td><td>25\u201355<\/td><td>Fine-Medium<\/td><td>Shop primers, structural steel cleaning<\/td><\/tr>\n        <tr><td>S-230\u2013S-330<\/td><td>3\u20138<\/td><td>10\u201325<\/td><td>Fine<\/td><td>Peening, thin primers, light coatings<\/td><\/tr>\n        <tr><td rowspan=\"2\"><strong>Glass Beads (Round)<\/strong><\/td><td>Size 16\u201325<\/td><td>1\u20135<\/td><td>5\u201315<\/td><td>Smooth<\/td><td>Peening only \u2014 not for coated systems<\/td><\/tr>\n        <tr><td>Size 35\u201360<\/td><td>0.5\u20132<\/td><td>2\u20138<\/td><td>Very Smooth<\/td><td>Polishing, peening, aesthetic finish<\/td><\/tr>\n        <tr><td rowspan=\"2\"><strong>Garnet (Angular)<\/strong><\/td><td>G16\u2013G25<\/td><td>25\u201345<\/td><td>60\u2013100<\/td><td>Medium-Rough<\/td><td>Industrial coatings, marine antifouling<\/td><\/tr>\n        <tr><td>G50\u2013G80<\/td><td>10\u201322<\/td><td>25\u201355<\/td><td>Medium<\/td><td>General industrial primers<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n<\/section>\n\n<section id=\"c8-coating\">\n  <h2>Coating System Anchor Profile Requirements<\/h2>\n  <p>Every protective coating system has a specified anchor profile requirement published in its technical data sheet (TDS). Matching the blasting grit to the coating specification is mandatory \u2014 a surface that is too smooth will not provide adequate mechanical adhesion, while a surface that is too rough may result in peaks protruding above the coating film, creating corrosion initiation points.<\/p>\n\n  <div class=\"c8-table-wrap\">\n    <table class=\"c8-table\">\n      <thead>\n        <tr><th>Coating System<\/th><th>Typical DFT (\u00b5m)<\/th><th>Required Profile Ra (\u00b5m)<\/th><th>Required Profile Rz (\u00b5m)<\/th><th>Recommended Media &amp; Grit<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>Inorganic zinc silicate<\/td><td>50\u201375<\/td><td>40\u201375<\/td><td>75\u2013150<\/td><td>Al\u2082O\u2083 F24\u2013F36 or Garnet G16\u2013G25<\/td><\/tr>\n        <tr><td>Zinc-rich epoxy primer<\/td><td>50\u2013100<\/td><td>30\u201365<\/td><td>60\u2013120<\/td><td>Al\u2082O\u2083 F30\u2013F46 or Steel Grit G40<\/td><\/tr>\n        <tr><td>High-build epoxy<\/td><td>125\u2013500<\/td><td>20\u201350<\/td><td>45-90<\/td><td>Al\u2082O\u2083 F36\u2013F60 or Steel Grit G40\u2013G80<\/td><\/tr>\n        <tr><td>FBE (Fusion-Bonded Epoxy)<\/td><td>300\u2013500<\/td><td>40\u201375<\/td><td>80\u2013150<\/td><td>Steel Grit G25\u2013G40 or Al\u2082O\u2083 F24\u2013F36<\/td><\/tr>\n        <tr><td>Polyurea \/ Polyurethane<\/td><td>500\u20132,000<\/td><td>25\u201360<\/td><td>60\u2013120<\/td><td>Al\u2082O\u2083 F36\u2013F60<\/td><\/tr>\n        <tr><td>Powder coating<\/td><td>60\u2013150<\/td><td>8\u201325<\/td><td>20\u201350<\/td><td>Al\u2082O\u2083 F60\u2013F100 or Glass Bead size 35<\/td><\/tr>\n        <tr><td>Thin-film architectural coating<\/td><td>25\u201375<\/td><td>5\u201315<\/td><td>12\u201335<\/td><td>Al\u2082O\u2083 F80\u2013F120<\/td><\/tr>\n        <tr><td>Thermal spray (HVOF)<\/td><td>100\u2013500<\/td><td>40\u201380<\/td><td>80\u2013160<\/td><td>Al\u2082O\u2083 F16\u2013F30 or SiC F24\u2013F46<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <div class=\"c8-box c8-box-key\">\n    <div class=\"c8-box-title\">&#9888; Always Read the Coating TDS<\/div>\n    <p>The anchor profile ranges in the table above are representative guidelines. Always consult the actual Technical Data Sheet for the specific coating product you are applying \u2014 the manufacturer&#8217;s requirements are the binding specification. Coating warranty claims can be voided by surface preparation that does not comply with the TDS specification.<\/p>\n  <\/div>\n<\/section>\n\n<section id=\"c8-matrix\">\n  <h2>Application-to-Grit Selection Matrix<\/h2>\n  <p>Use this matrix to quickly identify which grit size ranges are appropriate for common blasting applications across the main substrate categories. &#9679; = recommended, &#9670; = conditional\/with caution, &#9675; = not recommended.<\/p>\n\n  <div class=\"c8-matrix-wrap\">\n    <table class=\"c8-matrix\">\n      <thead>\n        <tr>\n          <th>Anmeldung<\/th>\n          <th>F12\u2013F24 (Very Coarse)<\/th>\n          <th>F30\u2013F60 (Coarse-Med)<\/th>\n          <th>F60\u2013F120 (Med-Fine)<\/th>\n          <th>F120\u2013F220 (Fine)<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr>\n          <td>Tight mill scale removal (structural steel)<\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n        <\/tr>\n        <tr>\n          <td>Heavy rust removal (pitted steel)<\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n        <\/tr>\n        <tr>\n          <td>Light rust &amp; paint removal (mild steel)<\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n        <\/tr>\n        <tr>\n          <td>Weld cleaning (carbon steel)<\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n        <\/tr>\n        <tr>\n          <td>Stainless steel finishing<\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n        <\/tr>\n        <tr>\n          <td>Aluminum surface prep<\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n        <\/tr>\n        <tr>\n          <td>Concrete floor profiling<\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n        <\/tr>\n        <tr>\n          <td>Glass etching &amp; frosting<\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n        <\/tr>\n        <tr>\n          <td>Automotive paint stripping<\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n        <\/tr>\n        <tr>\n          <td>Shot peening (aerospace\/auto)<\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n        <\/tr>\n        <tr>\n          <td>Precision deburring of hardened parts<\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n          <td><span class=\"c8-dot-no\">&#215;<\/span><\/td>\n          <td><span class=\"c8-dot-part\">&#9670;<\/span><\/td>\n          <td><span class=\"c8-dot-yes\">&#10003;<\/span><\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <p>For the full step-by-step selection methodology, including how to use the coating TDS to determine grit specification, see our dedicated guide: <a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-choose-sandblasting-material-step-by-step-selection-guide\/\" target=\"_blank\" rel=\"noopener\">how to choose sandblasting material: step-by-step selection guide<\/a>.<\/p>\n<\/section>\n\n<section id=\"c8-pressure\">\n  <h2>Blast Pressure &amp; Grit Interaction<\/h2>\n  <p>Grit size alone does not determine the surface profile produced \u2014 blast pressure is an equally important variable. The same grit size at different pressures can produce significantly different Ra values, and the interaction between grit size and pressure determines both the surface finish quality and the media consumption rate.<\/p>\n\n  <h3>General Pressure Guidelines by Media Type<\/h3>\n  <div class=\"c8-table-wrap\">\n    <table class=\"c8-table\">\n      <thead>\n        <tr><th>Medienart<\/th><th>Recommended Pressure Range (PSI)<\/th><th>Effect of Higher Pressure<\/th><th>Effect of Lower Pressure<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>Aluminum Oxide (coarse F16\u2013F46)<\/td><td>80\u2013110 PSI<\/td><td>Deeper profile, faster cleaning, more fines<\/td><td>Shallower profile, slower cleaning<\/td><\/tr>\n        <tr><td>Aluminum Oxide (fine F60\u2013F220)<\/td><td>60\u201390 PSI<\/td><td>Risk of particle fracture, uneven profile<\/td><td>Consistent fine finish<\/td><\/tr>\n        <tr><td>Steel Shot \/ Steel Grit<\/td><td>50\u2013100 PSI<\/td><td>Deeper profile, higher media stress<\/td><td>Lighter profile, less media wear<\/td><\/tr>\n        <tr><td>Glasperlen<\/td><td>40\u201380 PSI<\/td><td>Bead fracture, sharp fragments, damage risk<\/td><td>Gentler cleaning, longer media life<\/td><\/tr>\n        <tr><td>Garnet (coarse G16\u2013G30)<\/td><td>70\u2013100 PSI<\/td><td>Faster cleaning, more dust<\/td><td>Slower cleaning, less dust<\/td><\/tr>\n        <tr><td>Walnut Shell \/ Corn Cob<\/td><td>20\u201350 PSI<\/td><td>Rapid fracture, excessive dust, poor results<\/td><td>Gentle, effective cleaning<\/td><\/tr>\n        <tr><td>Siliziumkarbid<\/td><td>70\u2013100 PSI<\/td><td>Aggressive material removal, high dust<\/td><td>Controlled cutting on hard materials<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n<\/section>\n\n<section id=\"c8-faq\">\n  <h2>H\u00e4ufig gestellte Fragen<\/h2>\n  <div>\n    <div class=\"c8-faq-item\" style=\"border:1px solid #e2e6ec;border-radius:8px;overflow:hidden;margin-bottom:10px\">\n      <button onclick=\"this.parentElement.classList.toggle('c8-open')\" style=\"width:100%;text-align:left;background:#f9fafb;border:none;cursor:pointer;padding:1rem 1.3rem;font-family:'Barlow',sans-serif;font-size:0.97rem;font-weight:600;color:#0d1117;display:flex;justify-content:space-between;align-items:center;gap:12px\">\n        What grit size should I use for Sa 2.5 surface preparation on carbon steel?\n        <span style=\"flex-shrink:0;width:20px;height:20px;border-radius:50%;background:#e2e6ec;display:flex;align-items:center;justify-content:center;font-size:1rem;color:#4a5568\">+<\/span>\n      <\/button>\n      <div style=\"display:none;padding:0 1.3rem 1rem;font-size:0.93rem;color:#2c3340;line-height:1.7;background:#fff\" class=\"c8-ans\">\n        <p>ISO 8501-1 Sa 2.5 (Thorough Blast Cleaning, equivalent to SSPC-SP 10 Near-White) requires removal of all visible rust, mill scale, and paint, with only light staining allowed on no more than 5% of the surface. For this cleanliness level on carbon steel with moderate rust: aluminum oxide F36\u2013F46 or garnet G25\u2013G30 at 80\u201390 PSI is the standard specification. If the steel has very tight mill scale (freshly rolled, minimal rust), step up to F24\u2013F36 for adequate profile penetration. Always verify the anchor profile achieved against your coating system specification \u2014 Sa 2.5 alone does not define a specific profile depth, only surface cleanliness.<\/p>\n      <\/div>\n    <\/div>\n    <div class=\"c8-faq-item\" style=\"border:1px solid #e2e6ec;border-radius:8px;overflow:hidden;margin-bottom:10px\">\n      <button onclick=\"this.parentElement.classList.toggle('c8-open')\" style=\"width:100%;text-align:left;background:#f9fafb;border:none;cursor:pointer;padding:1rem 1.3rem;font-family:'Barlow',sans-serif;font-size:0.97rem;font-weight:600;color:#0d1117;display:flex;justify-content:space-between;align-items:center;gap:12px\">\n        Is a finer grit always better for a smoother finish?\n        <span style=\"flex-shrink:0;width:20px;height:20px;border-radius:50%;background:#e2e6ec;display:flex;align-items:center;justify-content:center;font-size:1rem;color:#4a5568\">+<\/span>\n      <\/button>\n      <div style=\"display:none;padding:0 1.3rem 1rem;font-size:0.93rem;color:#2c3340;line-height:1.7;background:#fff\" class=\"c8-ans\">\n        <p>For surface profile (anchor profile) applications in coating work, there is an optimal range \u2014 not simply &#8220;finer is better.&#8221; Too fine a grit produces insufficient anchor profile for the coating to adhere mechanically, leading to premature coating failure regardless of how smooth the surface looks. The target is always the anchor profile range specified in the coating manufacturer&#8217;s TDS \u2014 not the smoothest possible surface. For applications where genuine surface smoothness is the goal (peening, polishing, aesthetic stainless steel finishing), then yes, finer grit produces smoother results. But these are fundamentally different application categories from protective coating preparation.<\/p>\n      <\/div>\n    <\/div>\n    <div class=\"c8-faq-item\" style=\"border:1px solid #e2e6ec;border-radius:8px;overflow:hidden;margin-bottom:10px\">\n      <button onclick=\"this.parentElement.classList.toggle('c8-open')\" style=\"width:100%;text-align:left;background:#f9fafb;border:none;cursor:pointer;padding:1rem 1.3rem;font-family:'Barlow',sans-serif;font-size:0.97rem;font-weight:600;color:#0d1117;display:flex;justify-content:space-between;align-items:center;gap:12px\">\n        Can I mix different grit sizes to get an intermediate profile?\n        <span style=\"flex-shrink:0;width:20px;height:20px;border-radius:50%;background:#e2e6ec;display:flex;align-items:center;justify-content:center;font-size:1rem;color:#4a5568\">+<\/span>\n      <\/button>\n      <div style=\"display:none;padding:0 1.3rem 1rem;font-size:0.93rem;color:#2c3340;line-height:1.7;background:#fff\" class=\"c8-ans\">\n        <p>Yes \u2014 blending grit sizes is a standard practice in steel abrasive blasting (shot\/grit blends) and is also done with mineral abrasives in specialized applications. Blending can produce a bimodal surface texture with both coarser peaks (from the larger grit fraction) and finer texture (from the finer fraction). However, for operations with reclaim systems, blended media creates classification challenges \u2014 the different size fractions will be removed at different rates by the classifier, causing the blend ratio to drift over time. For most standard applications, selecting a single grit size appropriate for the target profile is simpler and more controllable than blending.<\/p>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/section>\n\n<hr class=\"c8-divider\">\n\n<div class=\"c8-related\">\n  <div class=\"c8-related-title\">&#128214; Related Guides in This Resource Hub<\/div>\n  <ul>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/what-is-sandblasting-material-complete-guide-to-types-grit-selection\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Complete Guide to Sandblasting Material (Pillar)<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/aluminum-oxide-sandblasting-media-properties-grit-sizes-best-uses\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Aluminum Oxide: Full FEPA Grit Size Data<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-media-comparison-chart-hardness-cost-recyclability\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Sandblasting Media Comparison Chart<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-choose-sandblasting-material-step-by-step-selection-guide\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>How to Choose Sandblasting Material<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/best-sandblasting-material-for-metal-surface-prep-before-painting-coating\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Best Media for Metal Surface Prep Before Painting<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/sandblasting-media-safety-silica-health-risks-osha-rules-safe-alternatives\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Sandblasting Media Safety Guide<\/a><\/li>\n    <li><a href=\"https:\/\/hlh-js.com\/resource\/blog\/steel-grit-vs-steel-shot-which-blasting-media-is-right-for-heavy-work\/\" target=\"_blank\" rel=\"noopener\"><span>&#9656;<\/span>Steel Grit vs. Steel Shot: Size &amp; Profile Guide<\/a><\/li>\n  <\/ul>\n<\/div>\n\n<div class=\"c8-cta-pair\">\n  <div class=\"c8-cta c8-cta-primary\">\n    <h3>Request a Quote<\/h3>\n    <p>Know your grit size? Tell us the media type, FEPA grade, quantity, and packaging format \u2014 we&#8217;ll respond with competitive pricing within 24 hours.<\/p>\n    <a class=\"c8-btn c8-btn-white\" href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Get a Free Quote &#8594;<\/a>\n  <\/div>\n  <div class=\"c8-cta c8-cta-secondary\">\n    <h3>Talk to a Technical Advisor<\/h3>\n    <p>Have a coating specification and not sure which grit size to select? Our surface preparation engineers will match your spec to the right media grade.<\/p>\n    <a class=\"c8-btn c8-btn-dark\" href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Contact Our Team &#8594;<\/a>\n  <\/div>\n<\/div>\n\n<\/div>\n<script>\ndocument.querySelectorAll('.c8-faq-item button').forEach(function(btn){\n  btn.addEventListener('click',function(){\n    var item=this.parentElement;\n    var ans=item.querySelector('.c8-ans');\n    var icon=this.querySelector('span');\n    var wasOpen=item.classList.contains('c8-open');\n    document.querySelectorAll('.c8-faq-item').forEach(function(el){\n      el.classList.remove('c8-open');\n      var a=el.querySelector('.c8-ans');\n      var ic=el.querySelector('button span');\n      if(a) a.style.display='none';\n      if(ic) ic.textContent='+';\n    });\n    if(!wasOpen && ans){ans.style.display='block';icon.textContent='\u00d7';item.classList.add('c8-open');}\n  });\n});\n<\/script>","protected":false},"excerpt":{"rendered":"<p>Jiangsu Henglihong Technology Co., Ltd. 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