{"id":5967,"date":"2014-12-10T21:42:49","date_gmt":"2014-12-10T13:42:49","guid":{"rendered":"http:\/\/www.cncmachinings.com\/affordable-machining-hardness-range-for-iron-and-steel-castings\/"},"modified":"2014-12-10T21:45:08","modified_gmt":"2014-12-10T13:45:08","slug":"affordable-machining-hardness-range-for-iron-and-steel-castings","status":"publish","type":"post","link":"https:\/\/www.cncmachinings.com\/blog\/affordable-machining-hardness-range-for-iron-and-steel-castings\/","title":{"rendered":"Affordable Machining Hardness Range For Iron And Steel Castings"},"content":{"rendered":"<div style=\"float:leftmargin:5pxfont-size:80%\"><img decoding=\"async\" alt=\"\" src=\"https:\/\/www.cncmachinings.com\/blog\/wp-content\/uploads\/2014\/12\/13676523765_56a95bd2d1_m.jpg\" width=\"160\" \/><br \/> by <a href=\"http:\/\/www.flickr.com\/photos\/53354512@N00\/13676523765\">tudedude<\/a><\/div>\n<p><strong> Affordable Machining Hardness Variety For Iron And Steel Castings <\/strong><br \/>\n As for machining process, the hardness is an crucial issue. Too higher hardness will harm the cutters, and even trigger the failure of machining. Even so, as for the cast iron and cast steel, what is the affordable hardness range?<\/p>\n<p>According to my knowledge in the iron foundry in China, the following hardness range is suitable.<\/p>\n<p>1. The reasonable hardness range to cast iron<\/p>\n<p>Typically, the hardness of cast iron is indicated by BH (Brinell Hardness) or HB (Hardness of Brinell). The hardness significantly less than HB 220 will be appropriate for regular machining procedure. In other words, they are suitable for typical steel alloy cutters. Most of iron foundries could machine the iron castings in this hardness range.<\/p>\n<p>We suggest you to manage the hardness under HB 210. Simply because HB 220 is still a small challenging for the drilling and tapping.<\/p>\n<p>Nevertheless, by the special steel alloy cutters or ceramic cutters, the cast iron with hardness below HB 300 can be machined.<\/p>\n<p>2. The reasonable hardness range to cast steel<\/p>\n<p>Since the cast steel is a lot more brittle than cast iron, so it can be machined much more effortlessly.<\/p>\n<p>The cast steel with hardness under HB 330 can be machined by the regular steel alloy cutters. If we transfer it into Rockwell Hardness, it is about RH 35. The cast steel with hardness under HB 500 (RH 50) can be machined by the specific steel alloy cutters.<\/p>\n<p>In brief:<br \/>\nAs for Cast Iron<br \/>\nBelow BHN 220: Regular<br \/>\nBHN 220 to BHN 300: Specific<\/p>\n<p>As for Cast Steel<br \/>\nBeneath BHN 330, HRC 35: Typical<br \/>\nBHN 330, HRC 35 to BHN 500, HRC 50: Unique<\/p>\n<p>BHN signifies Brinell Hardness Number. HRC means Rockwell Hardness.<\/p>\n<p>The metal casting designers and foundries need to think about the hardness range cautiously, and arrange the production and machining method accordingly.<\/p>\n<p>As for the cast steel gears, we generally make the rough casting with regular hardness, then machine and hob it, then do the heat therapy to increase its surface hardness, and finally grind it to remove the surface oxide surface.<\/p>\n<p>Higher hardness will lead to the much more severe brittleness, so the affordable hardness range and heat therapy method is extremely critical for the outstanding components.<\/p>\n<p>\nThis post was from Dandong Foundry. For the entire write-up, please check Dandong Foundry Weblog.<\/p>\n<div>\n<p>\nhttp:\/\/www.iron-foundry.com<\/p>\n<p>http:\/\/www.iron-foundry.com\/machining-hardness-range.html<\/p>\n<\/div>\n<p>[youtube http:\/\/www.youtube.com\/watch?v=7ykQobgM248&#038;fs=1&#038;rel=0]<\/p>\n<p>I often felt like producing your personal tooling was a fantastic sense of accomplishment. I had a problem with poor surface finish from an Asian\/import carbide-brazed &#8230;<br \/>\n<strong>Video Rating: 4 \/ 5<\/strong><\/p>\n<p>Connected <a href=\"http:\/\/www.cncmachinings.com\/category\/machining\/\">Machining Steel Articles<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>by tudedude Affordable Machining Hardness Variety For Iron And Steel Castings As for machining process, the hardness is an crucial issue. Too higher hardness will harm the cutters, and even trigger the failure of machining. Even so, as for the cast iron and cast steel, what is the affordable hardness range? According to my knowledge [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5968,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[2307,1987,3711,3712,4161,2121,39],"class_list":["post-5967","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-machining","tag-affordable","tag-castings","tag-hardness","tag-iron","tag-machining","tag-range","tag-steel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Affordable Machining Hardness Range For Iron And Steel Castings<\/title>\n<meta name=\"description\" content=\"Affordable Machining Hardness Range For Iron And Steel Castings posted by CNC machining China services company and precision CNC machined parts Chinese manufacturer.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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