{"id":4270,"date":"2019-06-24T08:40:06","date_gmt":"2019-06-24T01:40:06","guid":{"rendered":"https:\/\/inoxdaiduong.com\/?p=4270"},"modified":"2023-02-28T13:24:03","modified_gmt":"2023-02-28T06:24:03","slug":"distinguish-the-hot-rolled-cold-rolled-stainless-steel","status":"publish","type":"post","link":"https:\/\/inoxdaiduong.com\/en\/distinguish-the-hot-rolled-cold-rolled-stainless-steel\/","title":{"rendered":"Distinguish the hot rolled cold rolled stainless steel"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">In order to distinguish the hot rolled stainless steel and cold rolled stainless steel, the first step is to follow <a href=\"https:\/\/inoxdaiduong.com\/en\/\">Inox Dai Duong\u2019s<\/a> research of the stainless steel producing process as below.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">At the early beginning of the process, it is the iron ore and scrap, then the finished process products are stainless steel, or differently called Inox. Moreover, have a look at the description chart of the manufacturing process for iron and steel:<\/span><\/p>\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">N\u1ed9i dung ch&iacute;nh<\/p><ul class=\"toc_list\"><li><a href=\"#Manufacturing_Process_for_Iron_and_Steel\">Manufacturing Process for Iron and Steel<\/a><ul><li><a href=\"#The_stage_1_Iron_making\">The stage 1: Iron making<\/a><\/li><li><a href=\"#The_stage_2_The_steel_making\">The stage 2 : The steel making<\/a><\/li><li><a href=\"#The_stage_3_the_continuos_casting\">The stage 3: the continuos casting<\/a><\/li><li><a href=\"#The_stage_4_rolling\">The stage 4: rolling<\/a><\/li><\/ul><\/li><li><a href=\"#Thus_right_at_this_stage_it_produces_cold_rolled_steel_and_hot_rolled_steel\">Thus, right at this stage, it produces cold rolled steel and hot rolled steel.<\/a><\/li><\/ul><\/div>\n<h2><span id=\"Manufacturing_Process_for_Iron_and_Steel\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Manufacturing Process for Iron and Steel<\/span><\/span><\/h2>\n<figure style=\"width: 1181px\" class=\"wp-caption aligncenter\"><img src=\"https:\/\/inoxdaiduong.com\/Uploads\/Image\/Tin%20t%E1%BB%A9c%20%C4%90%E1%BA%A1i%20D%C6%B0%C6%A1ng\/Phan%20biet%20inox%20can%20nong%20inox%20can%20nguoi.png\" alt=\"Manufacturing Process for Iron and Steel\" width=\"1181\" height=\"889\" \/><figcaption class=\"wp-caption-text\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Manufacturing Process for Iron and Steel<\/span><\/figcaption><\/figure>\n<h3><span id=\"The_stage_1_Iron_making\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>The stage 1: Iron making<\/strong><\/span><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">In this stage, the income raw materials are pellet, iron ore, coke, sintered ore, lime stone being transported to blast furnace.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">In the case of scrap, it is also heated with the approriate temperature to become hot metal<\/span><\/p>\n<h3><span id=\"The_stage_2_The_steel_making\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>The stage 2 : The steel making<\/strong><\/span><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">The hot metal made in the first stage is directed to the basic oxygen furnace or electric arc furnace. Here, hot metals are processed, separated impurities and created correlations between chemical components, according to that for deciding what kind of steel to produce or what type of steel grade. For example, the steel will be used to roll the bar SD390 the chemical components will be adjusted right at this stage to give the steel grade SD390.<\/span><\/p>\n<h3><span id=\"The_stage_3_the_continuos_casting\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>The stage 3: the continuos casting<\/strong><\/span><\/span><\/h3>\n<p><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Then the hot steel from stage 2 is moved to :<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Steel casting: producing other steel items.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">The furnace casting ingot:<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><img class=\"aligncenter wp-image-1798 size-large\" src=\"https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/01\/thep-cuon-can-nguoi-840x340.jpg\" alt=\"Cold rolled steel coil\" width=\"830\" height=\"336\" srcset=\"https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/01\/thep-cuon-can-nguoi-840x340.jpg 840w, https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/01\/thep-cuon-can-nguoi-476x193.jpg 476w, https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/01\/thep-cuon-can-nguoi-336x136.jpg 336w, https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/01\/thep-cuon-can-nguoi-768x311.jpg 768w, https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/01\/thep-cuon-can-nguoi.jpg 1000w\" sizes=\"(max-width: 830px) 100vw, 830px\" \/><\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>\u00a0Here, it\u2019s made 3 kinds of billet:<\/strong><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">The billet bars are available for the sizes like 100&#215;100, 125&#215;125, 150&#215;150 and length per piece 6-9- 12 m as well as usually being rolled to construction steel coil or strip steel.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">The slab billet is often used to make the hot rolled coil and sheet or the cold rolled coil and sheet. The bloom billet is taken a place of the two above billets.<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">After that, the billets can be formed into hot or cold direct rolling.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">The hot direct rolling is illustrated that the billet is still remained the heated form after billet processing in order to produce in stage 4<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">And the reverse form of the billet above is transported to other factories to reheat furnace, then passed to make products in the stage 4.<\/span><\/p>\n<h3><span id=\"The_stage_4_rolling\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>The stage 4: rolling<\/strong><\/span><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">The billets are transported to other section mills in order of making main products.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Putting billet into a steel mill (Section mill) to roll out steel products as follows: Rail (steel rail); Sheet pile (steel sheet); Shape (shape steel of all kinds); Bar (steel bar construction).<\/span><\/p>\n<p><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><img class=\"aligncenter wp-image-4258 size-large\" src=\"https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/08\/ong-inox-dai-duong-830x541.jpg\" alt=\"Stainless steel pipe production process at Inox Dai Duong factory\" width=\"830\" height=\"541\" srcset=\"https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/08\/ong-inox-dai-duong-830x541.jpg 830w, https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/08\/ong-inox-dai-duong-220x143.jpg 220w, https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/08\/ong-inox-dai-duong-570x372.jpg 570w, https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/08\/ong-inox-dai-duong-768x501.jpg 768w, https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/08\/ong-inox-dai-duong-476x310.jpg 476w, https:\/\/inoxdaiduong.com\/wp-content\/uploads\/2019\/08\/ong-inox-dai-duong.jpg 1080w\" sizes=\"(max-width: 830px) 100vw, 830px\" \/><\/span><\/p>\n<ul>\n<li><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><em><strong>See more:<\/strong> <a href=\"https:\/\/inoxdaiduong.com\/en\/production-process-of-decorative-stainless-steel-pipe\/\">Latest stainless steel production process \/ Stainless steel pipe production process at Inox Dai Duong factory<\/a><\/em><\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Putting billets into hot rolled mill (Hot Strip mill), billets will be rolled into hot rolled coil (Hot roll coil-HRC) or steel cutting plate (cut immediately the stock roll and bales-Baotou Goods). In the process of rolling out high-temperature hot rolled coil steel (eg 780<sup>o<\/sup>C) if you want to roll out cold rolled steel coil (Cold roll coil-CRC), reduce that temperature to the right temperature (eg: 480<sup>o<\/sup>C) and continue rolling down the thickness.<\/span><\/p>\n<h2><span id=\"Thus_right_at_this_stage_it_produces_cold_rolled_steel_and_hot_rolled_steel\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Thus, right at this stage, it produces cold rolled steel and hot rolled steel.<\/span><\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Currently, re-rolling mills in Vietnam are using hot rolled steel billet: (1.75-5.0 mm) then put it into a kiln up to the appropriate temperature (VD 480oC) to reduce the rolling Thickened cold rolled steel coil.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Putting billets into cast steel pipe mills (Seamless pipe mill) to produce seamless steel pipes.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Above, is the process of producing steel products. So we can understand how cold rolled steel, hot rolled steel produced. Here we can see some pictures to be able to distinguish cold rolled steel and hot rolled steel coil.<\/span><\/p>\n<table border=\"1\">\n<tbody>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>\u00a0<\/strong><\/span><\/td>\n<td><span style=\"color: #0000ff; font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>Cold rolled steel coil<\/strong><\/span><\/td>\n<td width=\"42%\"><span style=\"color: #ff0000; font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>Hot rolled steel coil<\/strong><\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>Available thickness<\/strong><\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">0.15mm-2mm<\/span><\/td>\n<td width=\"42%\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">\u00a0More than 0.9mm<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>Surface finish<\/strong><\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Bright white, high gloss.<\/span><\/td>\n<td width=\"42%\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Dark green, dark characteristic<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>Frontier<\/strong><\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Usually cut straight and sharp edges<\/span><\/td>\n<td width=\"42%\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Two rolls are often rounded, rough, rust-colored when left for long.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>Preservation<\/strong><\/span><\/td>\n<td><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Cold rolled goods usually have packaging and put in the house due to quickly rusted surface<\/span><\/td>\n<td width=\"42%\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\">Hot rolled steel can be left outdoors for a long time and does not require storage.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: right;\"><span style=\"font-family: 'times new roman', times, serif; font-size: 130%;\"><strong>Source: <a href=\"https:\/\/inoxdaiduong.com\/phan-biet-inox-can-nong-va-inox-can-nguoi\/\">Ph\u00e2n Bi\u1ec7t Inox C\u00e1n N\u00f3ng v\u00e0 Inox C\u00e1n Ngu\u1ed9i<\/a><\/strong><\/span><\/p>\n<div style=\"display: none;\"\n    class=\"kk-star-ratings kksr-valign-bottom kksr-align-center kksr-disabled\"\n    data-id=\"4270\"\n    data-slug=\"\">\n    <div class=\"kksr-stars\">\n    <div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\">\n            <div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\">\n            <div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\">\n            <div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\">\n            <div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\">\n            <div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    <div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\">\n            <div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\">\n            <div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\">\n            <div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\">\n            <div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\">\n            <div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n    <div class=\"kksr-legend\">\n            <span class=\"kksr-muted\"><\/span>\n    <\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>In order to distinguish the hot rolled stainless steel and cold rolled stainless steel, the first step is to follow Inox Dai Duong\u2019s research of the stainless steel producing process as below. At the early beginning of the process, it is the iron ore and scrap, then the finished process products are stainless steel, or[ &#8230; m\u1eddi xem th\u00eam]\n","protected":false},"author":1,"featured_media":4272,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Distinguish the hot rolled cold rolled stainless steel | Dai Duong<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/inoxdaiduong.com\/en\/distinguish-the-hot-rolled-cold-rolled-stainless-steel\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Distinguish the hot rolled cold rolled stainless steel | Dai Duong\" \/>\n<meta property=\"og:description\" content=\"In order to distinguish the hot rolled stainless steel and cold rolled stainless steel, the first step is to follow Inox Dai Duong\u2019s research of the stainless steel producing process as below. 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