{"id":1034,"date":"2023-02-06T15:34:53","date_gmt":"2023-02-06T15:34:53","guid":{"rendered":"http:\/\/omgurudevmetals.com\/?p=1034"},"modified":"2023-02-17T08:30:13","modified_gmt":"2023-02-17T08:30:13","slug":"how-is-stainless-steel-made","status":"publish","type":"post","link":"https:\/\/omgurudevmetals.com\/index.php\/2023\/02\/06\/how-is-stainless-steel-made\/","title":{"rendered":"How is Stainless Steel Made?"},"content":{"rendered":"\n

Stage 1 \u2013 Raw Materials<\/em><\/h2>\n\n\n\n

Raw materials used are stainless-\ufb06eel scrap, iron, nickel and chromium.<\/p>\n\n\n\n

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Stage 2 – Electric Arc Furnace<\/em>  <\/h2>\n\n\n\n

These substances are added into an Electric Arc Furnace (EAF) where electrodes heat the mix to its melting point.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Stage 3 \u2013 AOD Converter<\/em>  <\/h2>\n\n\n\n

The mix is then treated in Argon Oxygen Decarburization (AOD) Convertor where pipes blast Argon and Oxygen gases into it. The AOD minimises undesired oxidation and removes excess carbon from the mix.<\/p>\n\n\n\n

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Stage 4 – Vacuum Oxygen Decarburization<\/em>  <\/h2>\n\n\n\n
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The mix is then treated in a tank degassing unit which is additionally equipped with an oxygen blowing lance. Due to reduced carbon monoxide partial pressure under vacuum condition, this process helps in reducing the carbon content of high alloyed stainless steel grades.<\/p>\n\n\n\n

Stage 5 – Continuous Casting<\/em><\/h2>\n\n\n\n
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The stainless-steel mix is cast into stainless-steel slabs and blooms through a process called continuous casting.<\/p>\n\n\n\n

Stage 6 \u2013 Grinding  <\/em><\/h2>\n\n\n\n
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The stainless-steel slabs\/blooms go through a grinding process to remove any surface defect that has occurred during casting.<\/p>\n\n\n\n

Stage 7 \u2013 Reheating  <\/em><\/h2>\n\n\n\n
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The stainless-steel slabs are then reheated due to which a rusty scale (oxide) is accumulated on the surface. This scale is removed from the surface by high pressure water jets in a process called as Descaling.<\/p>\n\n\n\n

Stage 8 – Roughing Mill<\/em><\/h2>\n\n\n\n
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The stainless-steel slab is then sent back and forth through the Roughing Mill to reduce its thickness and increase its length, without changing its width.<\/p>\n\n\n\n

Stage 9 \u2013 Finishing Mill  <\/em><\/h2>\n\n\n\n
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Having acquired the shape of a sheet, it is now sent to further thinning in the Finishing Mill, depending on customer’ requirement.<\/p>\n\n\n\n

Stage 10 \u2013 Coiling<\/em><\/h2>\n\n\n\n
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These stainless-steel slabs are now turned into plates (~20 mm thickness) or coils (~6 mm thickness) as per order after several intermediate processes.<\/p>\n\n\n\n

Stage 11 \u2013 Annealing<\/em><\/h2>\n\n\n\n
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The hot rolled (HR) coil undergoes a thermal process called annealing, in which the metal is given a consistent, uniform internal structure and homogeneous properties. This helps to improve the mechanical stability and corrosion-resistance of the coil.<\/p>\n\n\n\n

Stage 12 \u2013 Pickling<\/em><\/h2>\n\n\n\n
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The stainless-steel coil then goes through a chemical process, Pickling, in which mill scales, surface oxides, and annealing oxides are removed.<\/p>\n\n\n\n

Stage 13 \u2013 Quality Testing<\/em><\/h2>\n\n\n\n
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There is quality testing at each stage of production, where a sample is taken from the product, and sent to labs for physical and chemical examination. Each gram of our stainless-steel is planned to perfection.<\/p>\n\n\n\n

Stage 14 – HRAP\/CRAP coils<\/em><\/h2>\n\n\n\n
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The resultant product is called Hot Rolled Annealed Pickled (HRAP) stainless-steel coil which goes either directly to the customer, or to be made into Cold Rolled Annealed Pickled (CRAP) stainless steel coil.<\/p>\n\n\n\n

Stage 15 \u2013 Customization<\/em><\/h2>\n\n\n\n
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CRAP coil goes through several production processes aimed at customising surface finish, thickness, product chemistry and mechanical properties. Different kinds of stainless-steel finishes such as CR, BA, and 2D\/2B are produced during these processes.<\/p>\n\n\n\n

Stage 16 \u2013 Slitting<\/em><\/h2>\n\n\n\n
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The stainless-steel coils in Cold Rolling Division are reduced to different widths as per the customer requirement.<\/p>\n","protected":false},"excerpt":{"rendered":"

Stage 1 \u2013 Raw Materials Raw materials used are stainless-\ufb06eel scrap, iron, nickel and chromium. Stage 2 – Electric Arc Furnace   These substances are added into an Electric Arc Furnace (EAF) where electrodes heat the mix to its melting point. Stage 3 \u2013 AOD Converter   The mix is then treated in Argon Oxygen […]<\/p>\n","protected":false},"author":1,"featured_media":1038,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[],"_links":{"self":[{"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/posts\/1034"}],"collection":[{"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/comments?post=1034"}],"version-history":[{"count":3,"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/posts\/1034\/revisions"}],"predecessor-version":[{"id":1082,"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/posts\/1034\/revisions\/1082"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/media\/1038"}],"wp:attachment":[{"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/media?parent=1034"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/categories?post=1034"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/omgurudevmetals.com\/index.php\/wp-json\/wp\/v2\/tags?post=1034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}