{"id":12724,"date":"2026-04-07T02:49:43","date_gmt":"2026-04-07T02:49:43","guid":{"rendered":"https:\/\/hlh-js.com\/?p=12724"},"modified":"2026-04-07T02:49:43","modified_gmt":"2026-04-07T02:49:43","slug":"blasting-media-for-automotive-aerospace-applications","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/ja\/resource\/blog\/blasting-media-for-automotive-aerospace-applications\/","title":{"rendered":"Blasting Media for Automotive &amp; Aerospace Applications"},"content":{"rendered":"<!-- ============================================================\n     JIANGSU HENGLIHONG TECHNOLOGY CO., LTD.\n     Article C-3: Blasting Media for Automotive & Aerospace Applications\n     Target URL: https:\/\/hlh-js.com\/resource\/blog\/blasting-media-for-automotive-aerospace-applications\/\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\": \"Blasting Media for Automotive & Aerospace Applications\",\n            \"description\": \"Precision media selection guide for automotive and aerospace blasting \\u2014 covering shot peening for fatigue life, composite surface prep, aluminum alloy finishing, aircraft paint stripping, and applicable industry standards (AMS, SAE, MIL-SPEC). 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\\\/blasting-media-for-automotive-aerospace-applications\\\/\"\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\": \"Blasting Media for Automotive & Aerospace Applications\",\n                    \"item\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/blasting-media-for-automotive-aerospace-applications\\\/\"\n                }\n            ]\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What blasting media is used for shot peening automotive components?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Shot peening of automotive components \\u2014 crankshafts, connecting rods, gears, springs, and suspension components \\u2014 primarily uses steel shot in SAE grades S-110 through S-460, selected based on the required Almen intensity and component geometry. Glass beads (AMS 2431) are specified for lighter peening of aluminum alloy components and precision parts where steel shot would cause unacceptable surface contamination or excessive peening intensity.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What media is approved for aerospace paint stripping?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Melamine plastic grit per AMS 2441 is the most widely approved media for aerospace paint stripping from aluminum alloy aircraft skins, CFRP panels, and composite structures. It removes topcoat and primer systems without damaging the substrate or disturbing anodized or alodined surface treatments. Urea plastic grit is used for the most delicate substrates requiring the lowest possible impact energy.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"How does shot peening improve fatigue life in aerospace components?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Shot peening introduces compressive residual stress in the surface layer of metallic components. Fatigue cracks initiate in tensile stress fields \\u2014 the compressive layer created by peening inhibits crack initiation and slows crack propagation, extending component fatigue life by 20\\u2013300% depending on the material, geometry, and loading conditions. This is why shot peening is mandatory for virtually all fatigue-critical aerospace components: landing gear, turbine disks, engine shafts, and structural fasteners.\"\n                    }\n                }\n            ]\n        }\n    ]\n}<\/script>\n\n<style>\n.hlh-c3*,.hlh-c3*::before,.hlh-c3*::after{box-sizing:border-box;margin:0;padding:0}\n.hlh-c3{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-c3 .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-c3 .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-c3 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class=\"hlh-hero-label\">Application Guide<\/div>\n    <h1>Blasting Media for Automotive &amp; Aerospace Applications<\/h1>\n    <p>A precision media selection guide for automotive and aerospace blasting \u2014 covering shot peening for fatigue life, composite surface prep, aluminum alloy finishing, aircraft paint stripping, and applicable industry standards including AMS, SAE, and MIL-SPEC.<\/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=\"#precision-demands\">Why These Industries Demand Precision Media Selection<\/a><\/li>\n      <li><a href=\"#shot-peening-automotive\">Shot Peening for Automotive Components<\/a><\/li>\n      <li><a href=\"#shot-peening-aerospace\">Shot Peening for Aerospace Components<\/a><\/li>\n      <li><a href=\"#aerospace-paint-strip\">Aerospace Paint Stripping<\/a><\/li>\n      <li><a href=\"#aluminum-surface-prep\">Aluminum Alloy Surface Preparation<\/a><\/li>\n      <li><a href=\"#composite-prep\">CFRP &amp; Composite Surface Preparation<\/a><\/li>\n      <li><a href=\"#engine-cleaning\">Engine Component Cleaning<\/a><\/li>\n      <li><a href=\"#standards-reference\">Industry Standards Reference<\/a><\/li>\n      <li><a href=\"#faq\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/a><\/li>\n    <\/ol>\n  <\/div>\n\n  <h2 id=\"precision-demands\">Why Automotive &amp; Aerospace Demand Precision Media Selection<\/h2>\n  <p class=\"hlh-lead\">Automotive and aerospace blasting applications represent the highest precision end of the abrasive blasting spectrum. Unlike structural steel preparation where a range of media choices produces acceptable results, these industries operate under tightly defined material specifications \u2014 AMS (Aerospace Material Specifications), SAE (Society of Automotive Engineers), and MIL-SPEC standards \u2014 that prescribe specific media types, sizes, hardness grades, and process parameters for each application.<\/p>\n  <p>The stakes in these sectors are correspondingly high. An incorrect media choice during aircraft paint stripping could damage a structural composite panel, requiring costly repair or replacement. Inappropriate peening media or intensity on a titanium turbine disk could introduce the wrong residual stress state, potentially reducing fatigue life rather than improving it. Ferrous contamination on an aluminum aerospace component from a steel blast media can initiate galvanic corrosion that propagates undetected under subsequent coatings.<\/p>\n  <p>This guide covers the five primary blasting applications in automotive and aerospace \u2014 shot peening, paint stripping, aluminum surface prep, composite prep, and engine component cleaning \u2014 with specific media recommendations and applicable standard references.<\/p>\n  <p>For the full media selection framework: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/how-to-choose-abrasive-blasting-media-7-key-factors-explained\/\" target=\"_blank\" rel=\"noopener\">How to Choose Abrasive Blasting Media: 7 Key Factors Explained<\/a>. For media type technical details: <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=\"shot-peening-automotive\">Shot Peening for Automotive Components<\/h2>\n  <p>Shot peening is a standard process in automotive powertrain and suspension manufacturing, applied to extend the fatigue life of high-cycle-load components by introducing compressive residual stress in their surface layers. The compressive stress zone inhibits fatigue crack initiation and slows crack propagation, extending component service life by 20\u2013300% in laboratory and field testing.<\/p>\n\n  <h3>Components Routinely Shot-Peened in Automotive Production<\/h3>\n  <ul>\n    <li><strong>Crankshafts and camshafts:<\/strong> Peening of fillet radii at journal-to-web transitions \u2014 the highest-stress locations \u2014 significantly extends fatigue life. SAE J808 governs automotive shot peening for crankshafts.<\/li>\n    <li><strong>Connecting rods:<\/strong> Peening of the beam and big-end bore area. Critical for high-performance and heavy-duty diesel engines.<\/li>\n    <li><strong>Valve springs:<\/strong> Entire spring peened to maximize fatigue life under high-frequency cyclic loading. Fine shot (S-110 to S-170) is used for the small wire diameter.<\/li>\n    <li><strong>Gears and transmission components:<\/strong> Peening of gear tooth roots and flanks improves resistance to bending fatigue and contact fatigue (pitting).<\/li>\n    <li><strong>Suspension springs and anti-roll bars:<\/strong> Coil springs are routinely peened to extend service life under road-load cycling.<\/li>\n    <li><strong>Wheel hubs and steering knuckles:<\/strong> Safety-critical components that benefit from maximum fatigue life enhancement.<\/li>\n  <\/ul>\n\n  <h3>Media for Automotive Shot Peening<\/h3>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/th><th>Peening Media<\/th><th>SAE Grade<\/th><th>Typical Almen Intensity<\/th><th>\u30ab\u30d0\u30ec\u30c3\u30b8<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>Crankshaft fillets<\/td><td>\u30b9\u30c1\u30fc\u30eb\u30b7\u30e7\u30c3\u30c8<\/td><td>S-230\u2013S-330<\/td><td>0.20\u20130.35A<\/td><td>100%+<\/td><\/tr>\n        <tr><td>Connecting rod (steel)<\/td><td>\u30b9\u30c1\u30fc\u30eb\u30b7\u30e7\u30c3\u30c8<\/td><td>S-170\u2013S-280<\/td><td>0.15\u20130.30A<\/td><td>100%+<\/td><\/tr>\n        <tr><td>\u30d0\u30eb\u30d6\u30b9\u30d7\u30ea\u30f3\u30b0<\/td><td>Steel Shot \/ Glass Bead<\/td><td>S-110\u2013S-170<\/td><td>0.10\u20130.25A<\/td><td>100%+<\/td><\/tr>\n        <tr><td>Gears (carburized steel)<\/td><td>\u30b9\u30c1\u30fc\u30eb\u30b7\u30e7\u30c3\u30c8<\/td><td>S-230\u2013S-390<\/td><td>0.25\u20130.45A<\/td><td>125%+<\/td><\/tr>\n        <tr><td>Aluminum suspension components<\/td><td>Glass Bead<\/td><td>AMS 2431 spec<\/td><td>0.004\u20130.010A<\/td><td>100%+<\/td><\/tr>\n        <tr><td>Titanium fasteners<\/td><td>Glass Bead \/ Ceramic Shot<\/td><td>AMS 2430 spec<\/td><td>0.004\u20130.008A<\/td><td>100%+<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <h2 id=\"shot-peening-aerospace\">Shot Peening for Aerospace Components<\/h2>\n  <p>Aerospace shot peening is governed by significantly more stringent specifications than automotive applications, reflecting the safety-critical nature of aerospace structures. AMS 2430 (shot peening) and AMS 2432 (computer-controlled shot peening) are the primary US aerospace standards. NADCAP (National Aerospace and Defense Contractors Accreditation Program) certification is required for suppliers performing shot peening on aerospace primary structure components.<\/p>\n\n  <h3>Aerospace Components Requiring Shot Peening<\/h3>\n  <ul>\n    <li><strong>Turbine engine disks and blades:<\/strong> Compressor and turbine disk forgings are peened to resist centrifugal fatigue, thermal fatigue, and foreign object damage initiation.<\/li>\n    <li><strong>Landing gear components:<\/strong> Structural elements subjected to very high cyclic loads during aircraft operations \u2014 axles, torque links, drag braces.<\/li>\n    <li><strong>Wing spars and structural fastener holes:<\/strong> Cold expansion and peening of fastener holes dramatically extends fatigue life of wing structural elements.<\/li>\n    <li><strong>Engine shafts and gearboxes:<\/strong> High-cycle fatigue loading requires maximum peening benefit at stress concentration points.<\/li>\n  <\/ul>\n\n  <h3>Aerospace Peening Media: Glass Bead vs Steel Shot<\/h3>\n  <p>Glass beads (AMS 2431 classification) are specified for aerospace applications involving aluminum alloys, titanium alloys, and nickel superalloys where iron contamination from steel shot is unacceptable. Ceramic shot (zirconia-based, per specific OEM specifications) is used for the most demanding clean-room or contamination-sensitive peening applications. Steel shot is acceptable for high-carbon steel components (landing gear steel, certain engine components) where iron contamination is not a concern. For complete glass bead technical reference: <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\">Glass Bead Blasting Media: Finish Quality, Mesh Sizes &amp; Equipment Compatibility<\/a>.<\/p>\n\n  <h2 id=\"aerospace-paint-strip\">Aerospace Paint Stripping<\/h2>\n  <p>Aircraft maintenance cycles require periodic complete paint stripping for structural inspection, corrosion treatment, and full repainting. The challenge is removing all coating layers \u2014 topcoat, primer, and any conversion coating topcoats \u2014 while preserving the underlying aluminum alloy skin or composite structure in its original, undamaged condition.<\/p>\n\n  <h3>Approved Media for Aerospace Paint Stripping<\/h3>\n  <p>Melamine plastic grit per <strong>AMS 2441<\/strong> is the industry-standard approved media for aerospace paint stripping from aluminum and composite structures. Process parameters per AMS 2441:<\/p>\n  <ul>\n    <li>Blasting pressure: 20\u201355 PSI (1.4\u20133.8 bar) depending on substrate and coating thickness<\/li>\n    <li>Nozzle standoff distance: 15\u201330 cm (6\u201312 inches)<\/li>\n    <li>Impingement angle: 30\u201360\u00b0 from perpendicular<\/li>\n    <li>Nozzle type: Standard or wide-fan venturi nozzle<\/li>\n    <li>Prohibited substrate indicators: No visible substrate metal removal, no fiber disruption in composites, no change in surface profile measurable by profilometer<\/li>\n  <\/ul>\n  <p>Urea plastic grit is specified for the most sensitive composite structures (honeycomb sandwich panels, thin-skin sections) where even melamine grit&#8217;s moderate hardness may cause fiber disruption if process parameters are not tightly controlled. See full plastic media guide: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/plastic-organic-blasting-media-walnut-shell-corn-cob-plastic-grit\/\" target=\"_blank\" rel=\"noopener\">Plastic &amp; Organic Blasting Media: Walnut Shell, Corn Cob &amp; Plastic Grit<\/a>.<\/p>\n\n  <h2 id=\"aluminum-surface-prep\">Aluminum Alloy Surface Preparation<\/h2>\n  <p>Aluminum alloy surface preparation for structural adhesive bonding, coating application, or anodizing requires a carefully controlled combination of surface cleanliness and profile. The key constraint that distinguishes aluminum from steel: all media used must be iron-free, and process parameters must be calibrated to prevent substrate deformation or excessive profile depth in thin sections.<\/p>\n\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>\u7533\u3057\u8fbc\u307f<\/th><th>Media Recommendation<\/th><th>Grit \/ Mesh Size<\/th><th>Pressure (PSI)<\/th><th>Target Profile<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>Pre-primer surface prep (structural)<\/td><td>White Aluminum Oxide<\/td><td>F60\u2013F80<\/td><td>50\u201370<\/td><td>Ra 2\u20135 \u00b5m<\/td><\/tr>\n        <tr><td>Pre-anodize surface conditioning<\/td><td>White Aluminum Oxide<\/td><td>F80\u2013F120<\/td><td>40\u201360<\/td><td>Ra 1\u20133 \u00b5m<\/td><\/tr>\n        <tr><td>Pre-bond surface activation<\/td><td>White Aluminum Oxide<\/td><td>F80\u2013F100<\/td><td>40\u201360<\/td><td>Ra 2\u20134 \u00b5m<\/td><\/tr>\n        <tr><td>Decorative satin finish<\/td><td>Glass Bead<\/td><td>US 100\u2013170<\/td><td>40\u201360<\/td><td>Ra 0.4\u20131.5 \u00b5m<\/td><\/tr>\n        <tr><td>Shot peening (light, non-structural)<\/td><td>Glass Bead<\/td><td>AMS 2431<\/td><td>Velocity controlled<\/td><td>Per Almen spec<\/td><\/tr>\n        <tr><td>Paint removal only<\/td><td>Melamine Plastic Grit<\/td><td>Medium grade<\/td><td>30\u201350<\/td><td>Zero substrate change<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <h2 id=\"composite-prep\">CFRP &amp; Composite Surface Preparation<\/h2>\n  <p>Carbon fiber reinforced polymer (CFRP) and other composite materials present unique blasting challenges: the reinforcement fibers must not be cut, delaminated, or exposed, while the surface must be adequately prepared for adhesive bonding, coating application, or repair lamination. Only soft abrasive media at carefully controlled pressures achieves this balance.<\/p>\n  <p>The standard approach for CFRP surface preparation is melamine plastic grit at 25\u201345 PSI. This lightly scours the composite surface, removing surface contamination and the resin-rich layer that reduces adhesive bond strength, without disrupting the carbon fiber reinforcement just below the surface. Post-blast inspection with a magnifying glass or profilometer confirms no fiber damage before bonding or coating proceeds.<\/p>\n  <p>For composite structures where even plastic grit at controlled pressure is considered too aggressive (thin honeycomb skins, damaged repair areas), hand-sanding or solvent wiping to ASTM D2093 is preferred over blasting.<\/p>\n\n  <h2 id=\"engine-cleaning\">Engine Component Cleaning<\/h2>\n  <p>Engine component cleaning \u2014 removing carbon deposits, varnish, oxidation, and old gasket material from cylinder heads, pistons, intake manifolds, and valvetrain components \u2014 requires media gentle enough to clean without dimensional alteration of precision-machined surfaces, while still removing carbonaceous deposits that resist soft media.<\/p>\n  <p>Walnut shell grit (20\/40 to 40\/60 mesh) is the standard for this application. Its Mohs 3\u20134 hardness removes carbon deposits efficiently without abrading the underlying cast iron, aluminum, or steel machined surfaces. Fine glass beads (US 120\u2013200) can also be used for cleaning and light surface brightening of precision engine components without any material removal. Full technical reference: <a class=\"hlh-link\" href=\"https:\/\/hlh-js.com\/resource\/blog\/plastic-organic-blasting-media-walnut-shell-corn-cob-plastic-grit\/\" target=\"_blank\" rel=\"noopener\">Plastic &amp; Organic Blasting Media<\/a>.<\/p>\n\n  <h2 id=\"standards-reference\">Industry Standards Reference<\/h2>\n  <div class=\"hlh-table-wrap\">\n    <table>\n      <thead>\n        <tr><th>Standard<\/th><th>Scope<\/th><th>Key Requirements<\/th><\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td><strong>AMS 2430<\/strong><\/td><td>Shot peening \u2014 general aerospace<\/td><td>Almen intensity, coverage, media hardness and size, process documentation<\/td><\/tr>\n        <tr><td><strong>AMS 2431<\/strong><\/td><td>Peening media \u2014 glass bead classification<\/td><td>Defines glass bead size classes GP1\u2013GP14 for aerospace peening<\/td><\/tr>\n        <tr><td><strong>AMS 2432<\/strong><\/td><td>Computer-controlled shot peening<\/td><td>CNC peening with real-time Almen intensity monitoring<\/td><\/tr>\n        <tr><td><strong>AMS 2441<\/strong><\/td><td>Plastic media blasting for paint stripping<\/td><td>Melamine grit, pressure limits, inspection requirements for aluminum and composite<\/td><\/tr>\n        <tr><td><strong>SAE J808<\/strong><\/td><td>Automotive shot peening<\/td><td>Automotive-specific peening requirements for powertrain components<\/td><\/tr>\n        <tr><td><strong>MIL-S-13165<\/strong><\/td><td>Shot peening of metal parts (military)<\/td><td>Military applications \u2014 similar to AMS 2430 but for defense procurement<\/td><\/tr>\n        <tr><td><strong>NADCAP AC7117<\/strong><\/td><td>NADCAP shot peening audit criteria<\/td><td>Required for NADCAP-approved shot peening facilities supplying aerospace OEMs<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n\n  <div class=\"hlh-cta\">\n    <h3>Source Aerospace &amp; Automotive Grade Blasting Media<\/h3>\n    <p>Jiangsu Henglihong Technology supplies glass beads (AMS 2431 compliant), aluminum oxide, silicon carbide, and steel shot for automotive and aerospace applications, with full batch-level quality documentation and available material certifications. Contact us for specification review and sample requests.<\/p>\n    <a href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Request a Specification Review<\/a>\n  <\/div>\n\n  <hr>\n\n  <h2 id=\"faq\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n  <div class=\"hlh-faq\">\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhC3Toggle(this)\">What blasting media is used for shot peening automotive components?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Automotive shot peening primarily uses steel shot in SAE grades S-110 through S-460, selected based on required Almen intensity and component geometry. Glass beads (AMS 2431) are specified for aluminum alloy components and precision parts where steel shot would cause iron contamination or excessive peening intensity. The component type and material determine the grade \u2014 valve springs use fine shot (S-110\u2013S-170); crankshaft fillets use medium shot (S-230\u2013S-330).<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhC3Toggle(this)\">What media is approved for aerospace paint stripping?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Melamine plastic grit per AMS 2441 is the most widely approved media for aerospace paint stripping from aluminum alloy aircraft skins and CFRP panels. It removes topcoat and primer without damaging the substrate or disturbing anodized surface treatments. Urea plastic grit is used for the most delicate substrates. All hard mineral and metallic media are prohibited for structural aerospace composite and aluminum paint stripping.<\/div>\n    <\/div>\n    <div class=\"hlh-faq-item\">\n      <button class=\"hlh-faq-q\" onclick=\"hlhC3Toggle(this)\">How does shot peening improve fatigue life in aerospace components?<span class=\"hlh-faq-arrow\">\u25bc<\/span><\/button>\n      <div class=\"hlh-faq-a\">Shot peening introduces compressive residual stress in the surface layer of metal components. Fatigue cracks initiate in tensile stress fields \u2014 the compressive layer inhibits crack initiation and slows propagation, extending fatigue life by 20\u2013300% depending on material and loading. This is why peening is mandatory for virtually all aerospace fatigue-critical components: landing gear, turbine disks, engine shafts, and structural fasteners.<\/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\/glass-bead-blasting-media-finish-quality-mesh-sizes-equipment-compatibility\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Media Types<\/div>\n        <div class=\"rc-title\">Glass Bead Blasting Media: Finish Quality, Mesh Sizes &amp; Equipment Compatibility<\/div>\n      <\/a>\n      <a class=\"hlh-related-card\" href=\"https:\/\/hlh-js.com\/resource\/blog\/plastic-organic-blasting-media-walnut-shell-corn-cob-plastic-grit\/\" target=\"_blank\" rel=\"noopener\">\n        <div class=\"rc-label\">Media Types<\/div>\n        <div class=\"rc-title\">Plastic &amp; Organic Blasting Media: Walnut Shell, Corn Cob &amp; Plastic Grit<\/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    <\/div>\n  <\/div>\n\n<\/div>\n\n<script>\n(function(){\n  function hlhC3Toggle(btn){\n    var item=btn.closest('.hlh-faq-item');\n    var isOpen=item.classList.contains('open');\n    document.querySelectorAll('.hlh-c3 .hlh-faq-item').forEach(function(el){el.classList.remove('open');});\n    if(!isOpen){item.classList.add('open');}\n  }\n  window.hlhC3Toggle=hlhC3Toggle;\n})();\n<\/script>","protected":false},"excerpt":{"rendered":"<p>Application Guide Blasting Media for Automotive &amp; Aerospace Applications A  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":12774,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-12724","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/posts\/12724","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/comments?post=12724"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/posts\/12724\/revisions"}],"predecessor-version":[{"id":12726,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/posts\/12724\/revisions\/12726"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/media\/12774"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/media?parent=12724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/categories?post=12724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/tags?post=12724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}