{"id":12694,"date":"2026-04-07T02:48:49","date_gmt":"2026-04-07T02:48:49","guid":{"rendered":"https:\/\/hlh-js.com\/?p=12694"},"modified":"2026-04-07T02:48:49","modified_gmt":"2026-04-07T02:48:49","slug":"steel-shot-steel-grit-blasting-media-angular-vs-round-for-surface-prep","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/ru\/resource\/\u0431\u043b\u043e\u0433\/steel-shot-steel-grit-blasting-media-angular-vs-round-for-surface-prep\/","title":{"rendered":"Steel Shot &amp; Steel Grit Blasting Media: Angular vs Round for Surface Prep"},"content":{"rendered":"<!-- ============================================================\n     JIANGSU HENGLIHONG TECHNOLOGY CO., LTD.\n     Article A-4: Steel Shot & Steel Grit Blasting Media\n     Target URL: https:\/\/hlh-js.com\/resource\/blog\/steel-shot-steel-grit-blasting-media-angular-vs-round-for-surface-prep\/\n     Last updated: April 2026\n     ============================================================ -->\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"Steel Shot & Steel Grit Blasting Media: Angular vs Round for Surface Prep\",\n            \"description\": \"Complete technical guide to steel shot and steel grit abrasive blasting media \\u2014 comparing spherical shot vs angular grit for surface profiles, peening, recyclability (200-300 cycles), hardness grades, and applications in shipbuilding, structural steel, and automotive manufacturing. 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\\\/steel-shot-steel-grit-blasting-media-angular-vs-round-for-surface-prep\\\/\"\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\": \"Steel Shot & Steel Grit Blasting Media: Angular vs Round for Surface Prep\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/steel-shot-steel-grit-blasting-media-angular-vs-round-for-surface-prep\\\/\"\n                }\n            ]\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What is the difference between steel shot and steel grit?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Steel shot consists of spherical particles that peen surfaces, producing a smooth, dimpled finish with compressive residual stress \\u2014 ideal for fatigue life improvement and shot peening. Steel grit consists of angular, irregularly shaped particles produced by crushing hardened steel shot; it cuts into surfaces to create a rough anchor profile essential for coating adhesion. Shot peens; grit profiles. Many operations use blends of both to achieve a combination of profile depth and surface smoothness.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"How many times can steel shot and steel grit be reused?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Steel shot and steel grit are among the most recyclable blast media available, typically offering 200 to 300 reuse cycles under a proper reclaim system with cyclone separation and media classification. This exceptional recyclability makes steel media the lowest-cost-per-cycle option in the abrasive blasting industry, despite its higher unit purchase price compared to mineral or organic alternatives.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What hardness grades are available for steel shot and grit?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Steel shot is available in hardness grades from approximately 40 to 51 HRC (Rockwell C hardness). Steel grit is typically harder, ranging from 54 to 65 HRC. Harder grades of grit cut more aggressively and produce deeper surface profiles; softer grades produce shallower profiles and last longer before breakdown. SAE and ISO standards classify steel media by size (S-110 through S-780 for shot; G-10 through G-120 for grit) and hardness grade.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Can steel shot and grit be used on stainless steel?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Steel shot and steel grit should not be used on stainless steel or non-ferrous metals. The ferrous particles embed in the substrate surface during blasting, causing iron contamination that destroys the passivation layer on stainless steel and can trigger rust staining. For stainless steel, glass beads, aluminum oxide (white grade), or stainless steel shot must be used instead.\"\n                    }\n                }\n            ]\n        }\n    ]\n}<\/script>\n\n<style>\n.hlh-a4*,.hlh-a4*::before,.hlh-a4*::after{box-sizing:border-box;margin:0;padding:0}\n.hlh-a4{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-a4 .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-a4 .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-a4 .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-a4 .hlh-hero h1{font-size:clamp(24px,4vw,36px);font-weight:700;color:#fff;line-height:1.25;margin-bottom:18px;position:relative;z-index:1}\n.hlh-a4 .hlh-hero p{font-size:17px;color:#AED6F1;max-width:680px;position:relative;z-index:1;margin-bottom:28px}\n.hlh-a4 .hlh-hero-meta{display:flex;gap:24px;flex-wrap:wrap;position:relative;z-index:1}\n.hlh-a4 .hlh-hero-meta span{font-size:13px;color:rgba(255,255,255,0.6);display:flex;align-items:center;gap:6px}\n.hlh-a4 .hlh-hero-meta span::before{content:'\u25cf';color:#5DADE2;font-size:8px}\n.hlh-a4 .hlh-toc{background:#F4F6F8;border-left:4px solid #1A5276;border-radius:0 10px 10px 0;padding:28px 32px;margin-bottom:52px}\n.hlh-a4 .hlh-toc-title{font-size:15px;font-weight:700;color:#1A5276;text-transform:uppercase;letter-spacing:.06em;margin-bottom:16px}\n.hlh-a4 .hlh-toc ol{padding-left:20px;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:4px 32px}\n.hlh-a4 .hlh-toc li{font-size:14px;line-height:1.6}\n.hlh-a4 .hlh-toc a{color:#1A5276;text-decoration:none;font-weight:500}\n.hlh-a4 .hlh-toc a:hover{text-decoration:underline}\n.hlh-a4 h2{font-size:clamp(20px,3vw,26px);font-weight:700;color:#0d2d47;margin:52px 0 18px;padding-bottom:10px;border-bottom:3px solid #1A5276;scroll-margin-top:80px}\n.hlh-a4 h3{font-size:19px;font-weight:700;color:#1A5276;margin:34px 0 12px}\n.hlh-a4 p{margin-bottom:18px;color:#2c3e50}\n.hlh-a4 .hlh-lead{font-size:18px;color:#2c3e50;border-left:4px solid #5DADE2;padding-left:20px;margin-bottom:28px;line-height:1.7}\n.hlh-a4 .hlh-box{border-radius:10px;padding:22px 26px;margin:26px 0}\n.hlh-a4 .hlh-box-blue{background:#EBF5FB;border:1px solid #AED6F1}\n.hlh-a4 .hlh-box-green{background:#EAFAF1;border:1px solid #A9DFBF}\n.hlh-a4 .hlh-box-orange{background:#FEF9E7;border:1px solid #F9E79F}\n.hlh-a4 .hlh-box-red{background:#FDEDEC;border:1px solid #F5B7B1}\n.hlh-a4 .hlh-box-title{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}\n.hlh-a4 .hlh-box-blue .hlh-box-title{color:#1A5276}\n.hlh-a4 .hlh-box-green .hlh-box-title{color:#1E8449}\n.hlh-a4 .hlh-box-orange .hlh-box-title{color:#B7770D}\n.hlh-a4 .hlh-box-red .hlh-box-title{color:#922B21}\n.hlh-a4 .hlh-box p,.hlh-a4 .hlh-box li{font-size:15px;color:#2c3e50;margin-bottom:6px}\n.hlh-a4 .hlh-box ul{padding-left:18px}\n.hlh-a4 .hlh-table-wrap{overflow-x:auto;margin:26px 0;border-radius:10px;box-shadow:0 2px 12px rgba(0,0,0,0.07)}\n.hlh-a4 table{width:100%;border-collapse:collapse;font-size:14px;min-width:560px}\n.hlh-a4 thead tr{background:#1A5276;color:#fff}\n.hlh-a4 thead th{padding:12px 15px;text-align:left;font-weight:600;font-size:13px;white-space:nowrap}\n.hlh-a4 tbody tr:nth-child(even){background:#F4F8FB}\n.hlh-a4 tbody tr:nth-child(odd){background:#fff}\n.hlh-a4 tbody td{padding:10px 15px;border-bottom:1px solid #EAF0F6;color:#2c3e50;vertical-align:top}\n.hlh-a4 tbody tr:hover td{background:#EBF5FB}\n.hlh-a4 .hlh-two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:26px 0}\n.hlh-a4 .hlh-col-card{border:1px solid #D5E8F3;border-radius:10px;padding:22px 20px;background:#fff}\n.hlh-a4 .hlh-col-card h4{margin:0 0 10px;font-size:16px;color:#0d2d47}\n.hlh-a4 .hlh-col-card p{font-size:14px;color:#5d6d7e;margin-bottom:8px;line-height:1.6}\n.hlh-a4 .hlh-col-card ul{padding-left:18px;margin:0}\n.hlh-a4 .hlh-col-card li{font-size:14px;color:#5d6d7e;margin-bottom:5px}\n.hlh-a4 .hlh-related{margin:48px 0 32px}\n.hlh-a4 .hlh-related-title{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:#7f8c8d;margin-bottom:14px}\n.hlh-a4 .hlh-related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px}\n.hlh-a4 .hlh-related-card{display:block;text-decoration:none;border:1px solid #D5E8F3;border-left:4px solid #1A5276;border-radius:0 10px 10px 0;padding:16px 18px;background:#fff;transition:background .2s}\n.hlh-a4 .hlh-related-card:hover{background:#EBF5FB}\n.hlh-a4 .hlh-related-card .rc-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:#5DADE2;margin-bottom:5px}\n.hlh-a4 .hlh-related-card .rc-title{font-size:13px;font-weight:600;color:#0d2d47;line-height:1.4}\n.hlh-a4 .hlh-cta{background:linear-gradient(135deg,#1A5276,#0d2d47);border-radius:12px;padding:38px 44px;text-align:center;margin:48px 0 32px}\n.hlh-a4 .hlh-cta h3{font-size:22px;color:#fff;margin:0 0 10px;font-weight:700}\n.hlh-a4 .hlh-cta p{color:#AED6F1;font-size:15px;margin:0 0 22px}\n.hlh-a4 .hlh-cta a{display:inline-block;background:#fff;color:#1A5276;font-size:14px;font-weight:700;padding:12px 30px;border-radius:6px;text-decoration:none}\n.hlh-a4 .hlh-cta a:hover{background:#AED6F1}\n.hlh-a4 .hlh-faq{margin:26px 0}\n.hlh-a4 .hlh-faq-item{border:1px solid #D5E8F3;border-radius:8px;margin-bottom:10px;overflow:hidden}\n.hlh-a4 .hlh-faq-q{width:100%;background:#F4F8FB;border:none;cursor:pointer;text-align:left;padding:15px 18px;font-size:15px;font-weight:600;color:#0d2d47;display:flex;justify-content:space-between;align-items:center;gap:12px}\n.hlh-a4 .hlh-faq-q:hover{background:#EBF5FB}\n.hlh-a4 .hlh-faq-arrow{flex-shrink:0;width:20px;height:20px;background:#1A5276;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:11px;transition:transform .3s}\n.hlh-a4 .hlh-faq-item.open .hlh-faq-arrow{transform:rotate(180deg)}\n.hlh-a4 .hlh-faq-a{display:none;padding:15px 18px;font-size:14px;color:#2c3e50;line-height:1.7;border-top:1px solid #D5E8F3;background:#fff}\n.hlh-a4 .hlh-faq-item.open .hlh-faq-a{display:block}\n.hlh-a4 a.hlh-link{color:#1A5276;font-weight:600;text-decoration:underline;text-underline-offset:3px}\n.hlh-a4 a.hlh-link:hover{color:#2980B9}\n.hlh-a4 hr{border:none;border-top:1px solid #EAF0F6;margin:44px 0}\n.hlh-a4 ul,.hlh-a4 ol{padding-left:22px;margin-bottom:18px}\n.hlh-a4 li{margin-bottom:7px;color:#2c3e50;font-size:15px}\n.hlh-a4 strong{color:#0d2d47}\n@media(max-width:640px){.hlh-a4 .hlh-hero{padding:34px 22px}.hlh-a4 .hlh-cta{padding:30px 22px}.hlh-a4 .hlh-two-col{grid-template-columns:1fr}}\n<\/style>\n\n<div class=\"hlh-a4\">\n\n  <div class=\"hlh-hero\">\n    <div class=\"hlh-hero-label\">Media Types \u2014 In-Depth Guide<\/div>\n    <h1>Steel Shot &amp; Steel Grit Blasting Media: Angular vs Round for Surface Prep<\/h1>\n    <p>A complete technical guide to steel shot and steel grit \u2014 comparing spherical shot vs angular grit, surface profile outcomes, hardness grades, reuse economics, and applications across shipbuilding, structural steel, and automotive manufacturing.<\/p>\n    <div class=\"hlh-hero-meta\">\n      <span>Published April 2026<\/span>\n      <span>By Jiangsu Henglihong Technology Co., Ltd.<\/span>\n      <span>~2,300 words \u00b7 11 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=\"#overview\">Steel Shot vs Steel Grit: The Core Distinction<\/a><\/li>\n      <li><a href=\"#manufacturing\">How Steel Media Is Manufactured<\/a><\/li>\n      <li><a href=\"#properties\">Physical Properties &amp; Hardness Grades<\/a><\/li>\n      <li><a href=\"#size-standards\">Size Standards (SAE &amp; ISO)<\/a><\/li>\n      <li><a href=\"#surface-profiles\">Surface Profiles Produced<\/a><\/li>\n      <li><a href=\"#reuse\">Reusability: The 200\u2013300 Cycle Advantage<\/a><\/li>\n      <li><a href=\"#applications\">\u041e\u0442\u0440\u0430\u0441\u043b\u0435\u0432\u044b\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f<\/a><\/li>\n      <li><a href=\"#blending\">Shot &amp; Grit Blending<\/a><\/li>\n      <li><a href=\"#limitations\">Limitations &amp; When Not to Use Steel Media<\/a><\/li>\n      <li><a href=\"#faq\">\u0427\u0430\u0441\u0442\u043e \u0437\u0430\u0434\u0430\u0432\u0430\u0435\u043c\u044b\u0435 \u0432\u043e\u043f\u0440\u043e\u0441\u044b<\/a><\/li>\n    <\/ol>\n  <\/div>\n\n  <h2 id=\"overview\">Steel Shot vs Steel Grit: The Core Distinction<\/h2>\n  <p class=\"hlh-lead\">Steel shot and steel grit are both manufactured from steel and offer the same exceptional recyclability \u2014 200 to 300 cycles under a proper reclaim system \u2014 but they produce fundamentally different surface outcomes due to their opposing particle shapes. Understanding this distinction is the foundation of effective steel media selection.<\/p>\n\n  <div class=\"hlh-two-col\">\n    <div class=\"hlh-col-card\">\n      <h4>Steel Shot \u2014 Spherical<\/h4>\n      <p>Round particles that impact and compress the surface without cutting into it. Each impact produces a shallow, rounded dimple. The cumulative effect of thousands of overlapping impacts is:<\/p>\n      <ul>\n        <li>A smooth, uniform, peened surface texture<\/li>\n        <li>Compressive residual stress in the surface layer<\/li>\n        <li>Improved fatigue resistance and stress corrosion cracking resistance<\/li>\n        <li>No significant surface roughness anchor profile for coatings<\/li>\n      <\/ul>\n    <\/div>\n    <div class=\"hlh-col-card\">\n      <h4>Steel Grit \u2014 Angular<\/h4>\n      <p>Irregular, angular particles produced by crushing and screening hardened steel shot. Each particle cuts into the surface, creating sharp peaks and valleys. The cumulative effect produces:<\/p>\n      <ul>\n        <li>A rough, angular anchor profile for coating adhesion<\/li>\n        <li>Aggressive surface cleaning \u2014 removes mill scale, rust, and coatings efficiently<\/li>\n        <li>Higher surface roughness (Ra and Rz) than shot<\/li>\n        <li>Faster material removal per pass than spherical media<\/li>\n      <\/ul>\n    <\/div>\n  <\/div>\n\n  <p>Many industrial operations use <strong>blends of shot and grit<\/strong> to achieve a combined outcome \u2014 the grit component cuts the profile while the shot component smooths the highest peaks, producing a surface that has both adequate roughness for coating adhesion and a surface cleanliness that exceeds what grit alone would achieve. This approach is particularly common in automated wheel blasting lines for structural steel and pipe fabrication.<\/p>\n  <p>For a broader treatment of how particle shape drives surface outcomes across all media types, see: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/angular-vs-round-blasting-media-surface-profile-finish-differences\/\" target=\"_blank\" rel=\"noopener\">Angular vs Round Blasting Media: Surface Profile &amp; Finish Differences<\/a>.<\/p>\n\n  <h2 id=\"manufacturing\">How Steel Shot and Steel Grit Are Manufactured<\/h2>\n  <p><strong>\u0421\u0442\u0430\u043b\u044c\u043d\u0430\u044f \u0434\u0440\u043e\u0431\u044c<\/strong> is produced by atomization: molten steel is poured through a nozzle while high-pressure water or air jets break the stream into droplets. Surface tension causes these droplets to solidify into near-perfect spheres as they cool. The shot is then heat-treated to achieve the required hardness range, screened to size, and subjected to quality inspection for roundness and surface defects.<\/p>\n  <p><strong>\u0421\u0442\u0430\u043b\u044c\u043d\u0430\u044f \u043a\u0440\u043e\u0448\u043a\u0430<\/strong> is manufactured by taking hardened steel shot and crushing it between hardened steel rollers or in impact mills. The crushing process fractures the spheres into irregular angular fragments. These fragments are then screened to size and may receive additional hardening heat treatment to achieve the higher hardness grades required for aggressive surface profiling.<\/p>\n  <p>Jiangsu Henglihong Technology manufactures both steel shot and steel grit under ISO 9001-certified quality systems, with hardness verification, size distribution testing, and surface defect inspection carried out on each production batch.<\/p>\n\n  <h2 id=\"properties\">Physical Properties &amp; Hardness Grades<\/h2>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Property<\/th><th>\u0421\u0442\u0430\u043b\u044c\u043d\u043e\u0439 \u0432\u044b\u0441\u0442\u0440\u0435\u043b<\/th><th>\u0421\u0442\u0430\u043b\u044c\u043d\u0430\u044f \u043a\u0440\u043e\u0448\u043a\u0430<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>\u041c\u0430\u0442\u0435\u0440\u0438\u0430\u043b<\/td><td>High carbon cast steel<\/td><td>High carbon cast steel (crushed shot)<\/td><\/tr>\n        <tr><td>Shape<\/td><td>Spherical<\/td><td>Angular, irregular<\/td><\/tr>\n        <tr><td>Hardness range<\/td><td>40\u201351 HRC<\/td><td>54\u201365 HRC<\/td><\/tr>\n        <tr><td>True density<\/td><td>7.4\u20137.8 g\/cm\u00b3<\/td><td>7.4\u20137.8 g\/cm\u00b3<\/td><\/tr>\n        <tr><td>\u041d\u0430\u0441\u044b\u043f\u043d\u0430\u044f \u043f\u043b\u043e\u0442\u043d\u043e\u0441\u0442\u044c<\/td><td>4.5\u20135.0 g\/cm\u00b3<\/td><td>3.8\u20134.5 g\/cm\u00b3<\/td><\/tr>\n        <tr><td>Reuse cycles<\/td><td>200\u2013300\u00d7<\/td><td>200\u2013300\u00d7<\/td><\/tr>\n        <tr><td>Surface profile produced<\/td><td>Smooth, peened dimples<\/td><td>Angular peaks and valleys<\/td><\/tr>\n        <tr><td>Primary applicable standards<\/td><td>SAE J827, ISO 11124-3<\/td><td>SAE J1993, ISO 11124-2<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <h3>Steel Grit Hardness Grades<\/h3>\n  <p>Steel grit is classified into three hardness grades, each producing a distinct surface profile and wearing differently over service life:<\/p>\n  <ul>\n    <li><strong>GP (General Purpose, ~54\u201360 HRC):<\/strong> The softest grit grade. Less aggressive cutting, longer media life. Suitable for general coating preparation where a moderate anchor profile (25\u201375 \u00b5m) is required.<\/li>\n    <li><strong>GL (Hard, ~60\u201363 HRC):<\/strong> Intermediate grade. Produces deeper profiles and faster cutting than GP. The most widely used grade for shipbuilding, bridge preparation, and structural steel coating work requiring profiles up to 100 \u00b5m.<\/li>\n    <li><strong>GH (Extra Hard, ~63\u201365+ HRC):<\/strong> The hardest and most aggressive grade. Cuts the deepest anchor profiles and removes the most tenacious scale and corrosion fastest. Higher wear rate than softer grades \u2014 premium cost justified by throughput gains in high-volume operations.<\/li>\n  <\/ul>\n\n  <h2 id=\"size-standards\">Size Standards: SAE and ISO Classification<\/h2>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Steel Shot (SAE)<\/th><th>Nominal Diameter (mm)<\/th><th>Steel Grit (SAE)<\/th><th>Nominal Diameter (mm)<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>S-110<\/td><td>0.30<\/td><td>G-120<\/td><td>0.18<\/td><\/tr>\n        <tr><td>S-170<\/td><td>0.43<\/td><td>G-80<\/td><td>0.25<\/td><\/tr>\n        <tr><td>S-230<\/td><td>0.60<\/td><td>G-50<\/td><td>0.36<\/td><\/tr>\n        <tr><td>S-280<\/td><td>0.71<\/td><td>G-40<\/td><td>0.43<\/td><\/tr>\n        <tr><td>S-330<\/td><td>0.86<\/td><td>G-25<\/td><td>0.71<\/td><\/tr>\n        <tr><td>S-390<\/td><td>1.00<\/td><td>G-18<\/td><td>1.00<\/td><\/tr>\n        <tr><td>S-460<\/td><td>1.18<\/td><td>G-14<\/td><td>1.40<\/td><\/tr>\n        <tr><td>S-550<\/td><td>1.40<\/td><td>G-10<\/td><td>2.00<\/td><\/tr>\n        <tr><td>S-660<\/td><td>1.70<\/td><td>\u2014<\/td><td>\u2014<\/td><\/tr>\n        <tr><td>S-780<\/td><td>2.00<\/td><td>\u2014<\/td><td>\u2014<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <p>Larger shot and grit particles carry more kinetic energy at the same velocity, producing deeper peening effects and more aggressive surface profiling respectively. Smaller sizes produce finer, more uniform finishes with less aggressive material removal. Size selection is governed by the required surface profile specification and the available blasting equipment velocity range.<\/p>\n\n  <h2 id=\"surface-profiles\">Surface Profiles Produced<\/h2>\n  <p>The surface profiles achievable with steel media are governed by particle size, hardness, velocity, and the ratio of shot to grit in mixed operations. The following guidelines cover the most commonly specified applications:<\/p>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Media Type &amp; Size<\/th><th>Typical Ra (\u00b5m)<\/th><th>Typical Rz (\u00b5m)<\/th><th>ISO 8501-1 Grade<\/th><th>\u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>Steel shot S-230\u2013S-330<\/td><td>1\u20133<\/td><td>5\u201315<\/td><td>Sa 2.5 (with prior grit)<\/td><td>Shot peening, fatigue enhancement<\/td><\/tr>\n        <tr><td>Steel grit G-50\u2013G-25 (GP)<\/td><td>5\u20138<\/td><td>30\u201360<\/td><td>Sa 2.5<\/td><td>Standard coating prep, light steel work<\/td><\/tr>\n        <tr><td>Steel grit G-25\u2013G-18 (GL)<\/td><td>8\u201314<\/td><td>50\u2013100<\/td><td>Sa 2.5\u2013Sa 3<\/td><td>Shipbuilding, bridges, heavy coating systems<\/td><\/tr>\n        <tr><td>Steel grit G-14\u2013G-10 (GH)<\/td><td>12\u201320<\/td><td>75\u2013150<\/td><td>Sa 3<\/td><td>Aggressive mill scale removal, heavy industrial<\/td><\/tr>\n        <tr><td>Shot\/Grit blend (50\/50)<\/td><td>4\u201310<\/td><td>30\u201370<\/td><td>Sa 2.5<\/td><td>High-throughput structural steel, pipe mills<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <h2 id=\"reuse\">Reusability: The 200\u2013300 Cycle Economic Advantage<\/h2>\n  <p>The most economically significant characteristic of steel blasting media is its extraordinary recyclability. Under a well-maintained closed-loop reclaim system, steel shot and steel grit can be reused 200 to 300 times before replacement is required \u2014 a figure that translates directly into the lowest per-cycle media cost available in the abrasive blasting industry.<\/p>\n  <div class=\"hlh-box hlh-box-green\">\n    <div class=\"hlh-box-title\">Per-Cycle Cost Illustration<\/div>\n    <p>Steel grit at $1.50\/kg \u00d7 250 reuse cycles = <strong>$0.006 per effective cycle.<\/strong> By comparison, garnet at $0.40\/kg \u00d7 4 cycles = $0.10 per cycle. Single-use slag at $0.12\/kg = $0.12 per cycle. Steel grit&#8217;s effective cost is 16\u00d7 lower than garnet and 20\u00d7 lower than single-use slag \u2014 even accounting for the higher capital cost of a steel media reclaim system, the economics are compelling for any operation running more than a few tons of work per month.<\/p>\n  <\/div>\n  <p>The key enabling technology for this recyclability is the <strong>closed-loop reclaim system<\/strong>: a bucket elevator to return spent media from the blast chamber, an air wash separator to remove fine particles and dust, and a screening system to verify particle size distribution. Without reclaim, steel media loses much of its economic advantage. For full reclaim system guidance, see: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-recycling-reclaim-systems-reduce-cost-waste\/\" target=\"_blank\" rel=\"noopener\">Abrasive Blasting Media Recycling &amp; Reclaim Systems: Reduce Cost &amp; Waste<\/a>.<\/p>\n\n  <h2 id=\"applications\">\u041e\u0442\u0440\u0430\u0441\u043b\u0435\u0432\u044b\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f<\/h2>\n\n  <h3>Shipbuilding &amp; Marine Steel Structures<\/h3>\n  <p>Steel grit \u2014 primarily G-25 and G-18 grades \u2014 is the dominant blast media in shipyard surface preparation worldwide. Hull plates, frames, bulkheads, and structural members must be blasted to Sa 2.5 or Sa 3 cleanliness with a defined anchor profile before application of marine epoxy, antifouling, and corrosion-protection coating systems. The high throughput rates of automated wheel blasting lines in shipyards, combined with the economics of steel media&#8217;s recyclability, make the combination unbeatable for this application volume. For full guidance on marine applications, see: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/blasting-media-for-shipbuilding-marine-steel-structures\/\" target=\"_blank\" rel=\"noopener\">Blasting Media for Shipbuilding &amp; Marine Steel Structures<\/a>.<\/p>\n\n  <h3>Structural Steel Fabrication &amp; Bridge Construction<\/h3>\n  <p>Fabricated steel sections \u2014 I-beams, columns, plates, and assemblies \u2014 are routinely wheel-blasted with steel grit or shot\/grit blends to Sa 2.5 before shop-applied primer coating. The combination of high throughput (automated conveyor wheel blast lines can process hundreds of tons per hour) and low per-cycle media cost makes steel media the only economically rational choice at this scale.<\/p>\n\n  <h3>\u041f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0441\u0442\u0432\u043e \u0430\u0432\u0442\u043e\u043c\u043e\u0431\u0438\u043b\u044c\u043d\u044b\u0445 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432<\/h3>\n  <p>Steel shot is used extensively in automotive manufacturing for <strong>\u0434\u0440\u043e\u0431\u0435\u0441\u0442\u0440\u0443\u0439\u043d\u043e\u0435 \u0443\u043f\u0440\u043e\u0447\u043d\u0435\u043d\u0438\u0435<\/strong> of fatigue-critical components: crankshafts, connecting rods, gears, springs, and suspension components. The compressive residual stress layer introduced by shot peening extends component fatigue life by 50\u2013300% in laboratory testing, justifying the process cost for any high-cycle-load component. This process is governed by SAE AMS 2430 and related specifications defining Almen intensity and coverage percentage.<\/p>\n\n  <h3>Pipe &amp; Tube Mills<\/h3>\n  <p>Seamless and welded steel pipe, including oil and gas transmission pipeline, is routinely blasted with steel grit in automated internal and external blast machines before application of FBE (fusion-bonded epoxy), three-layer polyethylene, or coal tar enamel corrosion protection systems. The anchor profile requirements for pipeline coating systems (typically 50\u2013100 \u00b5m Rz) align well with steel grit G-25\/G-18 performance.<\/p>\n\n  <h3>Pressure Vessels &amp; Industrial Equipment<\/h3>\n  <p>Process vessels, heat exchangers, storage tanks, and industrial equipment require surface preparation before both internal and external coating application. Steel grit provides the combination of throughput, cost efficiency, and profile consistency required for large-vessel shop blasting operations.<\/p>\n\n  <h2 id=\"blending\">Shot &amp; Grit Blending: Getting the Best of Both<\/h2>\n  <p>Mixed shot\/grit operations \u2014 typically 30\u201370% grit with the balance shot, adjusted to the specific profile requirement \u2014 are common in high-production structural steel blasting lines. The grit component drives aggressive cleaning and profile creation; the shot component smooths the peak-to-valley ratio and improves surface cleanliness uniformity. The optimal blend ratio for a given operation is determined empirically by profiling test panels and adjusting until the required Ra, Rz, and ISO 8501-1 cleanliness grade are consistently achieved.<\/p>\n\n  <h2 id=\"limitations\">Limitations &amp; When Not to Use Steel Media<\/h2>\n  <div class=\"hlh-box hlh-box-red\">\n    <div class=\"hlh-box-title\">Critical Limitation: Iron Contamination<\/div>\n    <p>Steel shot and grit must never be used on stainless steel, aluminum, copper, or other non-ferrous metals. The steel particles embed in the substrate surface, introducing ferrous contamination that: (1) destroys the passivation layer of stainless steel, initiating corrosion; (2) causes rust staining visible after short-term exposure; (3) compromises anodizing or chromate conversion coating processes on aluminum. Use <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/glass-bead-blasting-media-finish-quality-mesh-sizes-equipment-compatibility\/\" target=\"_blank\" rel=\"noopener\">\u0441\u0442\u0435\u043a\u043b\u044f\u043d\u043d\u044b\u0435 \u0431\u0443\u0441\u0438\u043d\u044b<\/a> or white aluminum oxide for non-ferrous substrates.<\/p>\n  <\/div>\n  <p>Additional situations where steel media is not appropriate:<\/p>\n  <ul>\n    <li><strong>Thin or delicate substrates<\/strong> where the high-energy impact of dense steel particles would cause distortion or damage.<\/li>\n    <li><strong>Portable\/open-site blasting<\/strong> where media recovery is impractical. Steel media&#8217;s economic advantage depends entirely on reclaim; without it, per-use costs become unfavorable compared to mineral alternatives.<\/li>\n    <li><strong>Applications requiring zero surface profile<\/strong> (e.g., cleaning precision molds or optical surfaces) where even the peening dimples from steel shot are unacceptable.<\/li>\n  <\/ul>\n\n  <div class=\"hlh-cta\">\n    <h3>Source Steel Shot &amp; Steel Grit from Jiangsu Henglihong Technology<\/h3>\n    <p>We supply steel shot (S-110 through S-780) and steel grit (G-10 through G-120) in GP, GL, and GH hardness grades, with full SAE\/ISO compliance documentation and batch hardness certificates. Available globally in 25 kg bags and 1,000 kg bulk jumbo bags.<\/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\">\u0427\u0430\u0441\u0442\u043e \u0437\u0430\u0434\u0430\u0432\u0430\u0435\u043c\u044b\u0435 \u0432\u043e\u043f\u0440\u043e\u0441\u044b<\/h2>\n  <div class=\"hlh-faq\">\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA4Toggle(this)\">What is the difference between steel shot and steel grit?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Steel shot is spherical and peens surfaces, producing compressive stress and a smooth finish \u2014 used for fatigue life improvement. Steel grit is angular (produced by crushing shot) and cuts into surfaces to create rough anchor profiles for coating adhesion. Shot peens; grit profiles. Many operations blend both to achieve combined profile depth and surface cleanliness.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA4Toggle(this)\">How many times can steel shot and grit be reused?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Typically 200 to 300 cycles under a proper closed-loop reclaim system with cyclone separation and size classification. This extraordinary recyclability makes steel media the lowest-cost-per-cycle blasting material available \u2014 often 10\u201330\u00d7 cheaper per effective cycle than mineral alternatives despite higher unit purchase price.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA4Toggle(this)\">What hardness grades are available for steel grit?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Steel grit is available in three standard hardness grades: GP (~54\u201360 HRC) for general coating preparation with moderate profiles, GL (~60\u201363 HRC) for shipbuilding and bridge coating work requiring deeper profiles, and GH (~63\u201365+ HRC) for the most aggressive mill scale removal and deepest anchor profiles. Higher hardness cuts faster but wears more quickly.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhA4Toggle(this)\">Can steel shot and grit be used on stainless steel?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">No. Steel media embeds ferrous particles in the substrate surface, destroying the passivation layer on stainless steel and causing rust staining. For stainless steel, use glass beads or white aluminum oxide \u2014 both iron-free \u2014 to avoid contamination. This restriction applies to all non-ferrous metals including aluminum, copper, and titanium.<\/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\/angular-vs-round-blasting-media-surface-profile-finish-differences\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Selection Guide<\/div>\n        <div class=\"rc-title\">Angular vs Round Blasting Media: Surface Profile &amp; Finish Differences<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/reusable-vs-single-use-blasting-media-cost-analysis-roi\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Selection Guide<\/div>\n        <div class=\"rc-title\">Reusable vs Single-Use Blasting Media: Cost Analysis &amp; ROI<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/blasting-media-for-shipbuilding-marine-steel-structures\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Application Guide<\/div>\n        <div class=\"rc-title\">Blasting Media for Shipbuilding &amp; Marine Steel Structures<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/abrasive-blasting-media-recycling-reclaim-systems-reduce-cost-waste\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Safety &amp; Compliance<\/div>\n        <div class=\"rc-title\">Abrasive Blasting Media Recycling &amp; Reclaim Systems: Reduce Cost &amp; Waste<\/div>\n      <\/a>\n    <\/div>\n  <\/div>\n\n<\/div>\n\n<script>\n(function(){\n  function hlhA4Toggle(btn){\n    var item=btn.closest('.hlh-faq-item');\n    var isOpen=item.classList.contains('open');\n    document.querySelectorAll('.hlh-a4 .hlh-faq-item').forEach(function(el){el.classList.remove('open');});\n    if(!isOpen){item.classList.add('open');}\n  }\n  window.hlhA4Toggle=hlhA4Toggle;\n})();\n<\/script>","protected":false},"excerpt":{"rendered":"<p>Media Types \u2014 In-Depth Guide Steel Shot &amp; Steel Grit  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":12764,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-12694","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/posts\/12694","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/comments?post=12694"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/posts\/12694\/revisions"}],"predecessor-version":[{"id":12696,"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/posts\/12694\/revisions\/12696"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/media\/12764"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/media?parent=12694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/categories?post=12694"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/ru\/wp-json\/wp\/v2\/tags?post=12694"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}