{"id":12688,"date":"2026-04-07T02:48:36","date_gmt":"2026-04-07T02:48:36","guid":{"rendered":"https:\/\/hlh-js.com\/?p=12688"},"modified":"2026-04-07T02:48:36","modified_gmt":"2026-04-07T02:48:36","slug":"silicon-carbide-blasting-media-hardness-applications-reusability","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/fr\/resource\/blog\/silicon-carbide-blasting-media-hardness-applications-reusability\/","title":{"rendered":"Silicon Carbide Blasting Media: Hardness, Applications &amp; Reusability"},"content":{"rendered":"<!-- ============================================================\n     JIANGSU HENGLIHONG TECHNOLOGY CO., LTD.\n     Article A-2: Silicon Carbide Blasting Media\n     Target URL: https:\/\/hlh-js.com\/resource\/blog\/silicon-carbide-blasting-media-hardness-applications-reusability\/\n     Last updated: April 2026\n     ============================================================ -->\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"Silicon Carbide Blasting Media: Hardness, Applications & Reusability\",\n            \"description\": \"Complete technical guide to silicon carbide (SiC) abrasive blasting media \\u2014 covering extreme hardness properties, grades, reuse cycles, and applications on ceramics, hardened steels, and composite materials. By Jiangsu Henglihong Technology Co., Ltd.\",\n            \"author\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\"\n            },\n            \"publisher\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\"\n            },\n            \"datePublished\": \"2026-04-01\",\n            \"dateModified\": \"2026-04-01\",\n            \"mainEntityOfPage\": {\n                \"@type\": \"WebPage\",\n                \"@id\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/silicon-carbide-blasting-media-hardness-applications-reusability\\\/\"\n            }\n        },\n        {\n            \"@type\": \"BreadcrumbList\",\n            \"itemListElement\": [\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 1,\n                    \"name\": \"Home\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 2,\n                    \"name\": \"Resources\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 3,\n                    \"name\": \"Blog\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/\"\n                },\n                {\n                    \"@type\": \"ListItem\",\n                    \"position\": 4,\n                    \"name\": \"Silicon Carbide Blasting Media: Hardness, Applications & Reusability\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/silicon-carbide-blasting-media-hardness-applications-reusability\\\/\"\n                }\n            ]\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What is silicon carbide blasting media?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Silicon carbide blasting media is a synthetic abrasive made from silica sand and petroleum coke fused at very high temperatures in an electric resistance furnace. It rates 9 to 9.5 on the Mohs hardness scale \\u2014 the hardest commonly available blasting abrasive \\u2014 and is characterized by extremely sharp angular particles that cut aggressively into even the hardest substrates including ceramics, carbides, and hardened tool steels.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Is silicon carbide harder than aluminum oxide?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Yes. Silicon carbide rates 9 to 9.5 on the Mohs scale compared to aluminum oxide at approximately 9. While the difference seems small numerically, the Mohs scale is logarithmic, and silicon carbide's higher hardness translates to meaningfully faster cutting rates on the hardest substrates. For most industrial blasting on standard steel, aluminum oxide is sufficient; silicon carbide is reserved for ceramics, tungsten carbide, and other extremely hard materials.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"How many times can silicon carbide blast media be reused?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Silicon carbide can typically be reused 2 to 5 times under a proper reclaim system. Its high hardness and angular fracture behavior means individual particles break down relatively quickly during blasting, producing sharp new cutting edges but also reducing particle size rapidly. Fewer reuse cycles compared to aluminum oxide is one reason silicon carbide carries a higher cost per cycle despite being used for the most demanding applications.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What is the difference between black and green silicon carbide for blasting?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Black silicon carbide (SiC ~98%) is the standard grade for most abrasive blasting applications. It is produced from standard-purity raw materials and offers excellent hardness and cutting performance. Green silicon carbide (SiC ~99%+) is a higher-purity grade with slightly greater hardness and sharper fracture, typically reserved for the most demanding precision applications, lapping, and technical ceramics processing. For most blasting purposes, black SiC is the cost-effective choice.\"\n                    }\n                }\n            ]\n        }\n    ]\n}<\/script>\n\n<style>\n.hlh-a2*,.hlh-a2*::before,.hlh-a2*::after{box-sizing:border-box;margin:0;padding:0}\n.hlh-a2{font-family:'Segoe UI',Arial,sans-serif;font-size:16px;line-height:1.8;color:#1a1a2e;max-width:960px;margin:0 auto;padding:0 16px 60px}\n.hlh-a2 .hlh-hero{background:linear-gradient(135deg,#1A5276 0%,#0d2d47 100%);border-radius:12px;padding:52px 44px;margin-bottom:48px;position:relative;overflow:hidden}\n.hlh-a2 .hlh-hero::before{content:'';position:absolute;top:-60px;right:-60px;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,0.04)}\n.hlh-a2 .hlh-hero-label{display:inline-block;background:rgba(255,255,255,0.12);color:#AED6F1;font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;padding:4px 12px;border-radius:20px;margin-bottom:20px}\n.hlh-a2 .hlh-hero 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strong{color:#0d2d47}\n@media(max-width:640px){.hlh-a2 .hlh-hero{padding:34px 22px}.hlh-a2 .hlh-cta{padding:30px 22px}}\n<\/style>\n\n<div class=\"hlh-a2\">\n\n  <div class=\"hlh-hero\">\n    <div class=\"hlh-hero-label\">Media Types \u2014 In-Depth Guide<\/div>\n    <h1>Silicon Carbide Blasting Media: Hardness, Applications &amp; Reusability<\/h1>\n    <p>A complete technical reference for silicon carbide (SiC) abrasive blasting media \u2014 the hardest commonly available blast abrasive, engineered for the most demanding surface preparation and precision finishing applications.<\/p>\n    <div class=\"hlh-hero-meta\">\n      <span>Published April 2026<\/span>\n      <span>By Jiangsu Henglihong Technology Co., Ltd.<\/span>\n      <span>~2,200 words \u00b7 10 min read<\/span>\n    <\/div>\n  <\/div>\n\n  <div class=\"hlh-toc\">\n    <div class=\"hlh-toc-title\">Table of Contents<\/div>\n    <ol>\n      <li><a href=\"#what-is\">What Is Silicon Carbide Blasting Media?<\/a><\/li>\n      <li><a href=\"#manufacturing\">How It Is Made<\/a><\/li>\n      <li><a href=\"#properties\">Key Physical &amp; Chemical Properties<\/a><\/li>\n      <li><a href=\"#grades\">Black vs Green Silicon Carbide<\/a><\/li>\n      <li><a href=\"#grit-sizes\">Grit Size Chart<\/a><\/li>\n      <li><a href=\"#reuse\">Reusability &amp; Cost Considerations<\/a><\/li>\n      <li><a href=\"#applications\">Applications industrielles<\/a><\/li>\n      <li><a href=\"#vs-others\">SiC vs Other Blast Media<\/a><\/li>\n      <li><a href=\"#safety\">Safety &amp; Handling<\/a><\/li>\n      <li><a href=\"#faq\">Questions fr\u00e9quemment pos\u00e9es<\/a><\/li>\n    <\/ol>\n  <\/div>\n\n  <h2 id=\"what-is\">What Is Silicon Carbide Blasting Media?<\/h2>\n  <p class=\"hlh-lead\">Silicon carbide blasting media is a synthetic abrasive material composed of silicon and carbon (chemical formula SiC), produced at extremely high temperatures in an electric resistance furnace. With a Mohs hardness of 9 to 9.5 \u2014 the highest of any commonly used blast abrasive \u2014 it is the material of choice when nothing softer can adequately process a substrate.<\/p>\n  <p>Unlike many abrasive materials, silicon carbide does not occur naturally in usable form for industrial abrasives; it must be synthesized. Its exceptional hardness, combined with a highly angular fracture pattern and low density relative to its hardness, makes it an unusually aggressive cutting abrasive. Each particle, when it fractures under impact stress, exposes new razor-sharp cutting edges \u2014 making silicon carbide effectively self-sharpening in service.<\/p>\n  <p>Silicon carbide is the hardest of the four abrasive blasting media manufactured by Jiangsu Henglihong Technology. While it is the most specialized and highest-cost option in our product range, it is indispensable for applications where aluminum oxide, glass beads, or steel-based media simply cannot generate the required surface condition on ultra-hard substrates.<\/p>\n  <p>For context on where silicon carbide fits within the full spectrum of blasting media options, see the <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-complete-guide-to-types-properties-selection\/\" target=\"_blank\" rel=\"noopener\">Abrasive Blasting Media Complete Guide<\/a>.<\/p>\n\n  <h2 id=\"manufacturing\">How Silicon Carbide Abrasive Is Made<\/h2>\n  <p>Silicon carbide is produced via the <strong>Acheson process<\/strong>, named after the inventor Edward Goodrich Acheson who first synthesized SiC in 1891. In this process, silica sand (SiO\u2082) and petroleum coke (carbon source) are packed around a graphite resistance heating core in a large electric resistance furnace. An electrical current heats the core to temperatures between 1,600 \u00b0C and 2,500 \u00b0C, driving the reaction:<\/p>\n  <p style=\"text-align:center; font-style:italic; margin:20px 0; color:#1A5276; font-weight:600;\">SiO\u2082 + 3C \u2192 SiC + 2CO<\/p>\n  <p>The resulting silicon carbide forms as a crystalline mass around the heating element. After cooling, the mass is broken apart, crushed, and screened to the desired particle size distribution. The crushing process naturally produces the sharp, angular morphology characteristic of SiC blast abrasive.<\/p>\n  <p>The color of the resulting SiC \u2014 black or green \u2014 depends on the purity of the raw materials and the temperature profile of the furnace run. Green SiC forms closer to the heating element where temperatures are highest and purity is greatest; black SiC forms in the outer zones at slightly lower temperatures with a higher level of trace impurities.<\/p>\n\n  <h2 id=\"properties\">Key Physical &amp; Chemical Properties<\/h2>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Property<\/th><th>Black SiC<\/th><th>Green SiC<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>Chemical composition<\/td><td>SiC ~98%<\/td><td>SiC ~99%+<\/td><\/tr>\n        <tr><td>Mohs hardness<\/td><td>9.0\u20139.2<\/td><td>9.4\u20139.5<\/td><\/tr>\n        <tr><td>Knoop hardness<\/td><td>~2,400 kg\/mm\u00b2<\/td><td>~2,600 kg\/mm\u00b2<\/td><\/tr>\n        <tr><td>Crystal structure<\/td><td>\u03b1-SiC (hexagonal)<\/td><td>\u03b1-SiC (hexagonal)<\/td><\/tr>\n        <tr><td>Densit\u00e9 apparente<\/td><td>1.56\u20131.70 g\/cm\u00b3<\/td><td>1.56\u20131.68 g\/cm\u00b3<\/td><\/tr>\n        <tr><td>True density<\/td><td>3.20\u20133.22 g\/cm\u00b3<\/td><td>3.21\u20133.23 g\/cm\u00b3<\/td><\/tr>\n        <tr><td>Point de fusion<\/td><td>~2,700 \u00b0C (decomposes)<\/td><td>~2,700 \u00b0C (decomposes)<\/td><\/tr>\n        <tr><td>Forme des particules<\/td><td>Sharp angular, blocky<\/td><td>Sharp angular, slightly finer fracture<\/td><\/tr>\n        <tr><td>Free silica content<\/td><td>&lt;0.5%<\/td><td>&lt;0.1%<\/td><\/tr>\n        <tr><td>Couleur<\/td><td>Black \/ dark grey<\/td><td>Green \/ grey-green<\/td><\/tr>\n        <tr><td>Typical reuse cycles<\/td><td>2\u20135\u00d7<\/td><td>2\u20134\u00d7<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <p>Beyond hardness, silicon carbide&#8217;s most operationally significant property for blasting is its <strong>friability<\/strong>: it fractures more readily than aluminum oxide under impact, generating new sharp cutting surfaces at a higher rate. This means faster material removal per pass on ultra-hard substrates, but also faster media consumption \u2014 a direct trade-off that determines whether SiC is the right economic choice for a given application.<\/p>\n\n  <h2 id=\"grades\">Black vs Green Silicon Carbide: Which Grade to Specify?<\/h2>\n  <div class=\"hlh-cards\">\n    <div class=\"hlh-card\">\n      <h4>Black Silicon Carbide<\/h4>\n      <p>SiC ~98% purity. The standard grade for abrasive blasting, grinding wheels, and refractory applications. Slightly more brittle than green SiC \u2014 fractures more readily, producing sharp new edges but slightly faster breakdown. The cost-effective choice for most industrial blasting applications where maximum hardness is required.<\/p>\n    <\/div>\n    <div class=\"hlh-card\">\n      <h4>Green Silicon Carbide<\/h4>\n      <p>SiC ~99%+ purity. Slightly harder and tougher than black SiC. Reserved for the highest-precision applications: lapping and polishing optical components, processing technical ceramics, and applications where absolute purity is required. Carries a price premium over black SiC that is only justified in the most demanding use cases.<\/p>\n    <\/div>\n  <\/div>\n  <div class=\"hlh-box hlh-box-orange\">\n    <div class=\"hlh-box-title\">For Most Blasting Applications: Specify Black SiC<\/div>\n    <p>Unless your application involves optical or electronics-grade ceramic processing where purity is critical, black silicon carbide offers equivalent blasting performance at significantly lower cost than green SiC. The hardness and cutting action difference between the two grades is measurable in laboratory conditions but rarely decisive in production blasting environments.<\/p>\n  <\/div>\n\n  <h2 id=\"grit-sizes\">Grit Size Chart<\/h2>\n  <p>Silicon carbide is available in a wide range of grit sizes. The following table covers the sizes most relevant to blasting and surface finishing applications. For full cross-standard conversions (FEPA, ANSI, MESH, JIS), see the <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/blasting-media-grit-size-mesh-size-guide-how-to-read-convert\/\" target=\"_blank\" rel=\"noopener\">Blasting Media Grit Size &amp; Mesh Size Guide<\/a>.<\/p>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Grit (FEPA)<\/th><th>Particle Size (\u00b5m)<\/th><th>Surface Profile (Ra \u00b5m)<\/th><th>Primary Use<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>F16 \/ F24<\/td><td>850\u20132,000<\/td><td>100\u2013160+<\/td><td>Aggressive profiling of ceramics and carbide surfaces<\/td><\/tr>\n        <tr><td>F36 \/ F46<\/td><td>425\u2013850<\/td><td>60\u2013100<\/td><td>Coating prep on hardened steel, heavy profiling of SiC\/Al\u2082O\u2083 ceramics<\/td><\/tr>\n        <tr><td>F60 \/ F80<\/td><td>212\u2013425<\/td><td>30\u201360<\/td><td>General precision blasting on ceramics and composites<\/td><\/tr>\n        <tr><td>F100 \/ F120<\/td><td>106\u2013212<\/td><td>15\u201335<\/td><td>Precision surface conditioning, deburring hard components<\/td><\/tr>\n        <tr><td>F150 \/ F180<\/td><td>63-106<\/td><td>8\u201318<\/td><td>Fine finishing of technical ceramics, lapping prep<\/td><\/tr>\n        <tr><td>F220 \/ F240<\/td><td>44\u201363<\/td><td>4\u201310<\/td><td>Ultra-fine conditioning, optical surface prep<\/td><\/tr>\n        <tr><td>F280\u2013F1200<\/td><td>4\u201344<\/td><td>&lt;5<\/td><td>Lapping, polishing, micro-finishing of precision components<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <h2 id=\"reuse\">Reusability &amp; Cost Considerations<\/h2>\n  <p>Silicon carbide&#8217;s high friability \u2014 the property that makes it such an aggressive cutter \u2014 is also what limits its reusability compared to aluminum oxide or steel media. Typical reuse cycles under a proper reclaim system are 2 to 5 passes, with performance declining noticeably after the 3rd or 4th cycle as particles break down below the effective blasting size for the application.<\/p>\n  <p>This means silicon carbide carries a higher effective cost per cycle than aluminum oxide for applications where the extra hardness is not strictly necessary. The key question when evaluating SiC versus Al\u2082O\u2083 for a given application is: <strong>can aluminum oxide achieve the required surface condition in an acceptable time?<\/strong> If yes, aluminum oxide is the economically rational choice. If the substrate is too hard for Al\u2082O\u2083 to process efficiently \u2014 as is the case with ceramics, tungsten carbide, and hardened tool steels above HRC 60 \u2014 silicon carbide is the justified selection despite its higher cost.<\/p>\n  <div class=\"hlh-box hlh-box-blue\">\n    <div class=\"hlh-box-title\">Cost-Per-Cycle Perspective<\/div>\n    <p>Silicon carbide typically costs 1.5 to 2.5\u00d7 more per kilogram than equivalent-grit aluminum oxide. With 2\u20135 reuse cycles versus 4\u20138 for Al\u2082O\u2083, the effective cost-per-cycle premium for SiC is real and significant. In applications where both media could technically work, aluminum oxide is the preferred choice on cost grounds. Reserve silicon carbide for applications where nothing else can adequately do the job.<\/p>\n  <\/div>\n  <p>For a full cost-analysis framework comparing all major media types, see: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/reusable-vs-single-use-blasting-media-cost-analysis-roi\/\" target=\"_blank\" rel=\"noopener\">Reusable vs Single-Use Blasting Media: Cost Analysis &amp; ROI<\/a>.<\/p>\n\n  <h2 id=\"applications\">Industry Applications of Silicon Carbide Blast Media<\/h2>\n\n  <h3>Technical Ceramics &amp; Advanced Materials Processing<\/h3>\n  <p>Silicon carbide is the dominant blasting abrasive for processing technical ceramics \u2014 including sintered SiC, alumina ceramics, zirconia, silicon nitride, and boron carbide components. These materials are themselves extremely hard (often 8\u20139.5 on the Mohs scale), and only SiC abrasive can generate meaningful cutting action against them. Applications include surface roughening before brazing or bonding operations, cleaning ceramic kiln furniture, and conditioning ceramic cutting inserts.<\/p>\n\n  <h3>Hardened Tool Steel &amp; Tungsten Carbide<\/h3>\n  <p>Hardened tool steels (HRC 60+), cemented tungsten carbide tooling, and hard chrome plating surfaces resist effective blasting by aluminum oxide, which cannot maintain sufficient cutting pressure to profile them efficiently. Silicon carbide&#8217;s superior hardness enables adequate surface profiling and cleaning of these extreme-hardness substrates, making it the media of choice for tool room and carbide tooling maintenance operations.<\/p>\n\n  <h3>Composite Materials &amp; Carbon Fiber<\/h3>\n  <p>Carbon fiber reinforced polymer (CFRP) and other composite materials require careful abrasive selection for surface preparation prior to adhesive bonding or painting. Silicon carbide in fine grit sizes (F80\u2013F150) is used to activate composite surfaces without delaminating or fraying fiber structures. Its sharp cutting action at lower pressures achieves the required surface energy increase with minimal substrate damage.<\/p>\n\n  <h3>Glass Etching &amp; Decorative Processing<\/h3>\n  <p>SiC produces exceptionally crisp, sharp-edged etched surfaces on glass due to its angular fracture and high hardness. It is preferred over aluminum oxide for deep etching of architectural glass, crystal products, and display glass where edge definition is critical.<\/p>\n\n  <h3>Lapping &amp; Precision Finishing<\/h3>\n  <p>In finer grit sizes (F220 through F1200), silicon carbide is a standard lapping abrasive for precision components in optical, semiconductor, and precision engineering industries. The flat lapping of ceramic substrates, sapphire wafers, and precision steel components relies on SiC&#8217;s consistent particle size distribution and hardness.<\/p>\n\n  <h2 id=\"vs-others\">Silicon Carbide vs Other Abrasive Blasting Media<\/h2>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Media<\/th><th>Duret\u00e9 Mohs<\/th><th>Friability<\/th><th>Reuse Cycles<\/th><th>Relative Cost<\/th><th>Best Application Fit<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td><strong>Carbure de silicium<\/strong><\/td><td>9\u20139.5<\/td><td>Haut<\/td><td>2\u20135\u00d7<\/td><td>Haut<\/td><td>Ceramics, carbides, hardened steels &gt;HRC 60<\/td><\/tr>\n        <tr><td>Oxyde d'aluminium<\/td><td>9<\/td><td>Medium<\/td><td>4\u20138\u00d7<\/td><td>Medium<\/td><td>General steel, coating prep, deburring<\/td><\/tr>\n        <tr><td>Glass Bead<\/td><td>5.5\u20136<\/td><td>Medium-High<\/td><td>3\u20136\u00d7<\/td><td>Medium<\/td><td>Peening, decorative, stainless steel<\/td><\/tr>\n        <tr><td>Grain d'acier<\/td><td>7\u20138<\/td><td>Faible<\/td><td>200\u2013300\u00d7<\/td><td>Very Low\/cycle<\/td><td>High-volume structural steel prep<\/td><\/tr>\n        <tr><td>Grenat<\/td><td>7\u20138<\/td><td>Medium<\/td><td>3\u20135\u00d7<\/td><td>Medium<\/td><td>Marine, eco-sensitive, low dust<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <p>The decision between silicon carbide and <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/aluminum-oxide-blasting-media-properties-grit-sizes-best-uses\/\" target=\"_blank\" rel=\"noopener\">oxyde d'aluminium<\/a> is the most commonly encountered selection choice in precision industrial blasting. The rule is straightforward: if the substrate&#8217;s hardness or the required processing speed exceeds what aluminum oxide can deliver, silicon carbide is the next step. For a comprehensive side-by-side analysis of all blasting media: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-comparison-chart-hardness-profile-cost\/\" target=\"_blank\" rel=\"noopener\">Abrasive Blasting Media Comparison Chart<\/a>.<\/p>\n\n  <h2 id=\"safety\">Safety &amp; Handling<\/h2>\n  <p>Silicon carbide blasting media is chemically inert, non-flammable, and non-toxic. Its free silica content is very low (&lt;0.5% for black SiC, &lt;0.1% for green SiC), substantially below the crystalline silica thresholds that trigger the most stringent OSHA regulatory controls. It does not contain heavy metals or hazardous chemical constituents that would require special waste disposal in most industrial jurisdictions.<\/p>\n  <p>However, standard blasting safety requirements apply regardless of media type:<\/p>\n  <ul>\n    <li>Use <strong>NIOSH-approved supplied-air respirators<\/strong> during all open blasting operations.<\/li>\n    <li>Ensure <strong>adequate local exhaust ventilation<\/strong> in enclosed blasting environments.<\/li>\n    <li>Wear <strong>appropriate eye and body protection<\/strong> including blasting helmet, gloves, and blast suit.<\/li>\n    <li>Monitor <strong>ambient dust levels<\/strong> to remain within applicable occupational exposure limits.<\/li>\n    <li>Handle <strong>spent silicon carbide<\/strong> in accordance with local solid waste regulations, taking into account any contaminants from the blasted substrate.<\/li>\n  <\/ul>\n  <p>Full safety protocols for blasting operations: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-safety-ppe-ventilation-dust-control\/\" target=\"_blank\" rel=\"noopener\">Abrasive Blasting Media Safety: PPE, Ventilation &amp; Dust Control<\/a>.<\/p>\n\n  <div class=\"hlh-cta\">\n    <h3>Source Silicon Carbide Blasting Media from Jiangsu Henglihong Technology<\/h3>\n    <p>We supply both black and green silicon carbide in grit sizes from F16 through F1200, with full chemical analysis certificates and consistent particle size distribution data. Available in 25 kg bags and 1,000 kg bulk jumbo bags for global export.<\/p>\n    <a href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Request a Quote or Sample<\/a>\n  <\/div>\n\n  <hr>\n\n  <h2 id=\"faq\">Questions fr\u00e9quemment pos\u00e9es<\/h2>\n  <div class=\"hlh-faq\">\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA2Toggle(this)\">What is silicon carbide blasting media?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Silicon carbide blasting media is a synthetic abrasive (SiC) produced via the Acheson process at temperatures above 2,000 \u00b0C. Rating 9 to 9.5 on the Mohs scale, it is the hardest commonly available abrasive blasting material and is used for processing ceramics, tungsten carbide, hardened tool steels, and composite materials that cannot be adequately treated with softer abrasives.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA2Toggle(this)\">Is silicon carbide harder than aluminum oxide?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Yes. Silicon carbide rates 9\u20139.5 Mohs versus approximately 9 for aluminum oxide. While the numerical difference is small, the Mohs scale is not linear \u2014 SiC&#8217;s superior hardness translates to meaningfully faster cutting rates on the hardest substrates. For standard steel blasting, aluminum oxide is adequate and more cost-effective; SiC is reserved for applications where Al\u2082O\u2083 cannot do the job efficiently.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA2Toggle(this)\">How many times can silicon carbide blast media be reused?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Typically 2 to 5 times under a proper reclaim and classification system. SiC&#8217;s high friability means it fractures more quickly than aluminum oxide during use, generating excellent cutting action but also faster particle size reduction. A well-maintained cyclone separator and air wash system will maximize usable cycles by continuously removing degraded fines.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA2Toggle(this)\">What is the difference between black and green silicon carbide?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Black SiC (~98% purity) is the standard industrial grade \u2014 cost-effective, high-performance, and appropriate for most blasting applications. Green SiC (~99%+ purity) is slightly harder and purer, reserved for precision optical, semiconductor, and technical ceramics applications where absolute purity and maximum hardness are required. For most blasting purposes, black SiC is the right choice.<\/div>\n    <\/div>\n  <\/div>\n\n  <hr>\n\n  <div class=\"hlh-related\">\n    <div class=\"hlh-related-title\">Related Guides in This Series<\/div>\n    <div class=\"hlh-related-grid\">\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-complete-guide-to-types-properties-selection\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Complete Guide<\/div>\n        <div class=\"rc-title\">Abrasive Blasting Media: Complete Guide to Types, Properties &amp; Selection<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/aluminum-oxide-blasting-media-properties-grit-sizes-best-uses\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Media Types<\/div>\n        <div class=\"rc-title\">Aluminum Oxide Blasting Media: Properties, Grit Sizes &amp; Best Uses<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-comparison-chart-hardness-profile-cost\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Selection Guide<\/div>\n        <div class=\"rc-title\">Abrasive Blasting Media Comparison Chart: Hardness, Profile &amp; Cost<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-choose-abrasive-blasting-media-7-key-factors-explained\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Selection Guide<\/div>\n        <div class=\"rc-title\">How to Choose Abrasive Blasting Media: 7 Key Factors Explained<\/div>\n      <\/a>\n    <\/div>\n  <\/div>\n\n<\/div>\n\n<script>\n(function(){\n  function hlhA2Toggle(btn){\n    var item=btn.closest('.hlh-faq-item');\n    var isOpen=item.classList.contains('open');\n    document.querySelectorAll('.hlh-a2 .hlh-faq-item').forEach(function(el){el.classList.remove('open');});\n    if(!isOpen){item.classList.add('open');}\n  }\n  window.hlhA2Toggle=hlhA2Toggle;\n})();\n<\/script>","protected":false},"excerpt":{"rendered":"<p>Media Types \u2014 In-Depth Guide Silicon Carbide Blasting Media: Hardness,  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":12762,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-12688","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/12688","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/comments?post=12688"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/12688\/revisions"}],"predecessor-version":[{"id":12690,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/posts\/12688\/revisions\/12690"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media\/12762"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/media?parent=12688"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/categories?post=12688"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/fr\/wp-json\/wp\/v2\/tags?post=12688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}