{"id":2798,"date":"2026-03-11T13:10:45","date_gmt":"2026-03-11T13:10:45","guid":{"rendered":"https:\/\/hycuttingtools.com\/?post_type=product&#038;p=2798"},"modified":"2026-09-22T11:13:39","modified_gmt":"2026-09-22T11:13:39","slug":"hrc70-4-flute-solid-carbide-square-end-mill-for-hardened-steel","status":"publish","type":"product","link":"https:\/\/hycuttingtools.com\/de\/produkt\/hrc70-4-flute-solid-carbide-square-end-mill-for-hardened-steel\/","title":{"rendered":"HRC70 4-schneidiger Vollhartmetall-Vierkantfr\u00e4ser f\u00fcr geh\u00e4rteten Stahl"},"content":{"rendered":"<div class=\"hy-tab-wrap hy-overview-final\" style=\"width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 16px; background: #ffffff;\">\n<p><!-- SECTION 1 \u2014 OVERVIEW --><\/p>\n<section class=\"hy-tab-section\">\n<h2 class=\"hy-tab-main-title\">HRC70 4-Flute Solid Carbide Square End Mill Overview<\/h2>\n<p class=\"hy-tab-intro\">This HRC70-series 4-flute solid carbide square end mill is developed for finishing hardened steel and other confirmed high-hardness workpieces. Its TiSiN nano coating, ultra-fine 0.2 \u03bcm carbide matrix, reinforced core and strengthened cutting-edge geometry support thermal stability, edge strength and dimensional consistency under controlled hard-milling conditions.<\/p>\n<div style=\"display: flex; flex-wrap: wrap; width: 100%; margin: 20px 0 0; border: 1px solid #dbe3ec; border-top: 3px solid #2146B5; background: #f8fafc; box-sizing: border-box;\">\n<div style=\"flex: 1 1 140px; padding: 12px 14px; border-right: 1px solid #dbe3ec;\"><small style=\"display: block; color: #64748b; font-weight: bold;\">HARDNESS RANGE<\/small><strong>Up to HRC70*<\/strong><\/div>\n<div style=\"flex: 1 1 140px; padding: 12px 14px; border-right: 1px solid #dbe3ec;\"><small style=\"display: block; color: #64748b; font-weight: bold;\">FLUTE DESIGN<\/small><strong>4 Flutes<\/strong><\/div>\n<div style=\"flex: 1 1 140px; padding: 12px 14px; border-right: 1px solid #dbe3ec;\"><small style=\"display: block; color: #64748b; font-weight: bold;\">COATING<\/small><strong>TiSiN Nano<\/strong><\/div>\n<div style=\"flex: 1 1 140px; padding: 12px 14px;\"><small style=\"display: block; color: #64748b; font-weight: bold;\">PRIMARY USE<\/small><strong>Hard Milling Finish<\/strong><\/div>\n<\/div>\n<\/section>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Product Machining Video<\/h3>\n<div style=\"width: 100%; max-width: 860px; margin: 0 auto; overflow: hidden; border: 1px solid #e2e8f0; border-radius: 6px; background: #fff;\">\n<p><video class=\"lazyload\" style=\"display: block; width: 100%; height: auto; aspect-ratio: 16 \/ 9; background: #f8fafc; object-fit: contain;\" preload=\"metadata\" controls=\"controls\" width=\"300\" height=\"150\"><source src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/4-flutes-HRC70-square-end-mill-product-video.mp4\" type=\"video\/mp4\" \/>Your browser does not support HTML5 video.<\/video><\/p>\n<div class=\"hy-media-caption\" style=\"padding: 14px 18px; border-top: 1px solid #e2e8f0; background: #f8fafc; text-align: center;\">HRC70 4-Flute Square End Mill Machining Video<\/div>\n<\/div>\n<\/section>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Advanced TiSiN Nano Coating<\/h3>\n<div style=\"display: flex; flex-wrap: wrap; gap: 18px; align-items: center;\">\n<div style=\"flex: 1 1 430px; min-width: 0;\"><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/advanced-TiSiN-Nano-Coating.png\" style=\"display: block; width: 100%; height: auto; border-radius: 6px;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Advanced TiSiN nano coating detail\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; border-radius: 6px;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/advanced-TiSiN-Nano-Coating.png\" alt=\"Advanced TiSiN nano coating detail\" title=\"\"><\/noscript><\/div>\n<div style=\"flex: 1 1 350px; min-width: 0;\">\n<p class=\"hy-card-text\">The TiSiN nano coating supports surface hardness and thermal resistance, helping the cutting edge remain stable at elevated cutting temperatures. It is intended for controlled dry or air-assisted finishing of hardened steels and high-hardness alloys.<\/p>\n<div class=\"hy-note\" style=\"padding: 14px 18px; background: #f8fafc; border-left: 3px solid #2146B5;\"><strong>Application note:<\/strong> Confirm the actual workpiece grade, hardness and cutting conditions before machining near the upper hardness range.<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Ultra-Fine Carbide &amp; Reinforced Core<\/h3>\n<div style=\"display: flex; flex-wrap: wrap; gap: 16px; width: 100%;\">\n<div style=\"flex: 1 1 390px; border: 1px solid #e2e8f0; border-radius: 6px; overflow: hidden;\">\n<p><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/Ultra-Fine-0.2\u03bcm-Carbide-Matrix.webp\" style=\"display: block; width: 100%; height: auto;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Ultra-fine 0.2 micrometer carbide matrix\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/Ultra-Fine-0.2\u03bcm-Carbide-Matrix.webp\" alt=\"Ultra-fine 0.2 micrometer carbide matrix\" title=\"\"><\/noscript><\/p>\n<div style=\"padding: 14px 18px;\">\n<h4 class=\"hy-card-title\">Ultra-Fine 0.2 \u03bcm Matrix<\/h4>\n<p class=\"hy-card-text\">Supports coating adhesion, wear resistance and micro-chipping control in finishing operations.<\/p>\n<\/div>\n<\/div>\n<div style=\"flex: 1 1 390px; border: 1px solid #e2e8f0; border-radius: 6px; overflow: hidden;\">\n<p><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/Reinforced-Core-Rigidity.png\" style=\"display: block; width: 100%; height: auto;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Reinforced core rigidity structure\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/Reinforced-Core-Rigidity.png\" alt=\"Reinforced core rigidity structure\" title=\"\"><\/noscript><\/p>\n<div style=\"padding: 14px 18px;\">\n<h4 class=\"hy-card-title\">Reinforced Core Rigidity<\/h4>\n<p class=\"hy-card-text\">Helps limit tool deflection and supports dimensional consistency during light hard-milling engagement.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Optimized Cutting-Edge Geometry<\/h3>\n<div style=\"display: flex; flex-wrap: wrap; gap: 18px; align-items: center;\">\n<div style=\"flex: 1 1 430px; min-width: 0;\"><img decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/Optimized-Edge-Geometry.png\" style=\"display: block; width: 100%; height: auto; border-radius: 6px;\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Optimized cutting-edge geometry for hardened steel\" title=\"\"><noscript><img decoding=\"async\" style=\"display: block; width: 100%; height: auto; border-radius: 6px;\" src=\"https:\/\/hycuttingtools.com\/wp-content\/uploads\/2026\/03\/Optimized-Edge-Geometry.png\" alt=\"Optimized cutting-edge geometry for hardened steel\" title=\"\"><\/noscript><\/div>\n<div style=\"flex: 1 1 350px; min-width: 0;\">\n<h4 class=\"hy-card-title\">Strengthened Square-End Profile<\/h4>\n<p class=\"hy-card-text\">The edge profile is configured to resist premature chipping under high cutting resistance while supporting flat-bottom features and defined shoulders.<\/p>\n<h4 class=\"hy-card-title\">Four-Flute Stability<\/h4>\n<p class=\"hy-card-text\">Four cutting edges and a reinforced core support light side milling and finishing where rigidity and surface consistency are priorities.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"hy-tab-section\">\n<h3 class=\"hy-section-title\">Hardened-Steel Finishing Applications<\/h3>\n<div style=\"display: flex; flex-wrap: wrap; gap: 14px; width: 100%; margin: 0 0 14px;\">\n<div class=\"hy-tab-card\" style=\"flex: 1 1 220px; padding: 16px; border: 1px solid #e2e8f0; border-radius: 4px;\">\n<h4 class=\"hy-card-title\">Hardened Die &amp; Mold<\/h4>\n<p class=\"hy-card-text\">Finishing SKD11, D2, DC53, H13 and comparable heat-treated die steels.<\/p>\n<\/div>\n<div class=\"hy-tab-card\" style=\"flex: 1 1 220px; padding: 16px; border: 1px solid #e2e8f0; border-radius: 4px;\">\n<h4 class=\"hy-card-title\">Precision Gear Features<\/h4>\n<p class=\"hy-card-text\">Selected induction-hardened gear, spline and wear-resistant component features.<\/p>\n<\/div>\n<div class=\"hy-tab-card\" style=\"flex: 1 1 220px; padding: 16px; border: 1px solid #e2e8f0; border-radius: 4px;\">\n<h4 class=\"hy-card-title\">Hardened Structural Parts<\/h4>\n<p class=\"hy-card-text\">Finishing operations requiring controlled surface quality and dimensional consistency.<\/p>\n<\/div>\n<\/div>\n<div class=\"hy-note\" style=\"padding: 14px 18px; background: #f8fafc; border: 1px solid #e2e8f0; border-left: 3px solid #2146B5; border-radius: 4px;\"><strong>Setup Note:<\/strong> Use a rigid machine and precision holder, minimize tool overhang and apply conservative radial and axial engagement.<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<p style=\"font-size: 1.02rem; color: #4f6476; margin: 10px 0 16px; line-height: 1.75;\"><strong><span style=\"color: #003366;\">Engineered for hardened steel, die steel, and heat-treated alloys up to 70 HRC<\/span><\/strong><\/p>\n<ul style=\"margin: 0 0 18px 18px; padding: 0; color: #33485c; line-height: 1.8; font-size: 15px;\">\n<li>TiSiN nano coating for high heat resistance and coating stability<\/li>\n<li>Ultra-fine 0.2\u03bcm carbide substrate for improved wear resistance<\/li>\n<li>Reinforced core for rigid finishing<\/li>\n<li>Designed for hardened steel up to 70 HRC<\/li>\n<\/ul>\n<div style=\"margin-top: 18px;\">\n<div style=\"display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px;\">\n<div style=\"border: 1px solid #d7e0e8; background: #f4f7fa; border-radius: 10px; padding: 12px 14px;\">\n<div style=\"font-size: 12px; color: #5f7183; margin-bottom: 4px; font-weight: 600;\">Material<\/div>\n<div style=\"font-size: 14px; color: #1a2a3a; font-weight: bold;\">Solid Carbide<\/div>\n<\/div>\n<div style=\"border: 1px solid #d7e0e8; background: #f4f7fa; border-radius: 10px; padding: 12px 14px;\">\n<div style=\"font-size: 12px; color: #5f7183; margin-bottom: 4px; font-weight: 600;\">Fl\u00f6ten<\/div>\n<div style=\"font-size: 14px; color: #1a2a3a; font-weight: bold;\">4 Flutes<\/div>\n<\/div>\n<div style=\"border: 1px solid #d7e0e8; background: #f4f7fa; border-radius: 10px; padding: 12px 14px;\">\n<div style=\"font-size: 12px; color: #5f7183; margin-bottom: 4px; font-weight: 600;\">Typ<\/div>\n<div style=\"font-size: 14px; color: #1a2a3a; font-weight: bold;\">Vierkant-Schaftfr\u00e4ser<\/div>\n<\/div>\n<div style=\"border: 1px solid #d7e0e8; background: #f4f7fa; border-radius: 10px; padding: 12px 14px;\">\n<div style=\"font-size: 12px; color: #5f7183; margin-bottom: 4px; font-weight: 600;\">H\u00e4rte<\/div>\n<div style=\"font-size: 14px; color: #1a2a3a; font-weight: bold;\">HRC70<\/div>\n<\/div>\n<div style=\"border: 1px solid #d7e0e8; background: #f4f7fa; border-radius: 10px; padding: 12px 14px;\">\n<div style=\"font-size: 12px; color: #5f7183; margin-bottom: 4px; font-weight: 600;\">Beschichtung<\/div>\n<div style=\"font-size: 14px; color: #1a2a3a; font-weight: bold;\">TiSiN Nano Coating<\/div>\n<\/div>\n<div style=\"border: 1px solid #d7e0e8; background: #f4f7fa; border-radius: 10px; padding: 12px 14px;\">\n<div style=\"font-size: 12px; color: #5f7183; margin-bottom: 4px; font-weight: 600;\">Material des Werkst\u00fccks<\/div>\n<div style=\"font-size: 14px; color: #1a2a3a; font-weight: bold;\">Hardened Steel \/ Die Steel \/ Alloy Steel<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"featured_media":2885,"template":"","meta":{"_acf_changed":false,"googlesitekit_rrm_CAowkrPfCw:productID":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[2604,3641],"product_tag":[2693,2699,424],"class_list":["post-2798","product","type-product","status-publish","has-post-thumbnail","product_cat-solid-carbide-end-mills","product_cat-square-end-mills","product_tag-cnc-milling","product_tag-hardened-steel-machining","product_tag-square-end-mill","pa_workpiece-material-hardened-mold-steel","first","instock","shipping-taxable","product-type-simple","entry","content-bg","loop-entry"],"acf":[],"taxonomy_info":{"product_cat":[{"value":2604,"label":"Solid Carbide End Mills"},{"value":3641,"label":"Square End Mills"}],"product_tag":[{"value":2693,"label":"CNC Milling"},{"value":2699,"label":"Hardened Steel Machining"},{"value":424,"label":"square end mill"}],"pa_workpiece-material":[{"value":3620,"label":"Hardened &amp; 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