{"id":19536,"date":"2026-04-27T00:39:10","date_gmt":"2026-04-27T00:39:10","guid":{"rendered":"https:\/\/plugincomm.com\/jrmetalchennai\/?page_id=19536"},"modified":"2026-04-27T05:15:42","modified_gmt":"2026-04-27T05:15:42","slug":"crs-re-bars","status":"publish","type":"page","link":"https:\/\/plugincomm.com\/jrmetalchennai\/crs-re-bars\/","title":{"rendered":"CRS Re-Bars"},"content":{"rendered":"\t\t
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CRS Re-Bars (Corrosion-Resistant TMT Bars)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Built to Endure. Engineered for Tough Environments.<\/strong><\/p>\n

Corrosion is one of the most persistent and damaging threats to reinforced concrete structures. While it may not be entirely preventable, its onset can be significantly delayed through innovation and high-performance materials. Corrosion weakens the embedded steel, compromises structural strength, and leads to costly repairs or premature failure \u2014 especially in coastal, humid, or industrial zones.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Why Corrosion Occurs in RCC Structures?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Humidity & Moisture<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Continuous exposure to moisture triggers slow but steady corrosion, damaging homes, bridges, and critical infrastructure.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Atmospheric CO\u2082<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Carbon dioxide reacts with the concrete, neutralizing the protective alkaline layer around the steel and initiating rust formation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Chloride Attacks<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Chlorides from sea breeze, water, or de-icing salts penetrate the concrete and accelerate corrosion by converting iron to iron oxide and CO\u2082.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Industrial Pollutants<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Chlorides, carbon dioxide, and sulfur dioxide infiltrate the concrete matrix and aggressively corrode the embedded reinforcement.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Low pH Water in Concrete Mix<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Water with pH < 8.5 can cause corrosion when oxygen and moisture are present, compromising the steel core over time.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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JR Metal\u2019s Innovation in Corrosion-Resistant Steel<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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After years of dedicated R&D, JR Metal has developed a cost-effective CRS (Corrosion-Resistant Steel) composition specifically engineered to combat corrosion.<\/p>\n

Our proprietary formulation:<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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  • \n\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t<\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\tSignificantly slows the rate of corrosion.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t
  • \n\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t<\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\tEnhances the lifespan and structural reliability of RCC frameworks.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t
  • \n\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t<\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\tProvides added durability in coastal, marine, high-humidity, and chemically exposed areas.<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \" JR CRS Re-Bars are the smart choice for long-lasting structures, where environmental challenges demand steel that can go the distance.\"<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Standard Sizes and Technical Data<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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    Diameter<\/strong>
    (mm)<\/small><\/strong><\/td>\n    		Area<\/strong>
    (cm2<\/sup>)<\/small><\/strong><\/td>\n    		Weight<\/strong>
    (kg\/m)<\/small><\/strong><\/td>\n    		Nominal Length<\/strong>
    (m\/MT Approx.)<\/small><\/strong><\/td>\n    		Diameter<\/strong>
    (mm)<\/small><\/strong><\/td>\n<\/tr>\n<\/thead>\n
    6<\/td>\n0.28<\/td>\n0.206<\/td>\n0.222<\/td>\n4500<\/td>\n<\/tr>\n
    8<\/td>\n0.51<\/td>\n0.381<\/td>\n0.400<\/td>\n2500<\/td>\n<\/tr>\n
    10<\/td>\n0.76<\/td>\n0.581<\/td>\n0.600<\/td>\n1670<\/td>\n<\/tr>\n
    12<\/td>\n1.11<\/td>\n0.854<\/td>\n0.872<\/td>\n1150<\/td>\n<\/tr>\n
    16<\/td>\n1.95<\/td>\n1.500<\/td>\n1.530<\/td>\n650<\/td>\n<\/tr>\n
    20<\/td>\n3.07<\/td>\n2.393<\/td>\n2.410<\/td>\n415<\/td>\n<\/tr>\n
    25<\/td>\n4.90<\/td>\n3.750<\/td>\n3.850<\/td>\n260<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Chemical Composition<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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    Elements<\/b><\/td>\nMin (%)<\/strong><\/td>\nMax (%)<\/strong><\/td>\n<\/tr>\n<\/thead>\n
    Carbon<\/td>\n0.18<\/td>\n0.22<\/td>\n<\/tr>\n
    Manganese<\/td>\n0.45<\/td>\n0.55<\/td>\n<\/tr>\n
    Sulphur<\/td>\n0.030<\/td>\n0.050<\/td>\n<\/tr>\n
    Phosphorus<\/td>\n0.040<\/td>\n0.070<\/td>\n<\/tr>\n
    Chromium<\/td>\n0.25<\/td>\n0.40<\/td>\n<\/tr>\n
    Copper<\/td>\n0.30<\/td>\n0.40<\/td>\n<\/tr>\n
    Silicon<\/td>\n0.15<\/td>\n0.25<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Mechanical Properties<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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    Property<\/b><\/td>\nFe-415<\/b><\/td>\nFe-500<\/b><\/td>\n<\/tr>\n<\/thead>\n
    Yield\/0.2% Proof Strength<\/td>\n415 N\/mm\u00b2<\/td>\n500 N\/mm\u00b2<\/td>\n<\/tr>\n
    Ultimate Tensile Strength<\/td>\nEnsures a minimum of 10% above the measured yield or proof strength, with an absolute minimum not less than 485 N\/mm\u00b2.<\/td>\nEnsures a minimum of 8% above the measured yield or proof strength, with an absolute minimum not less than 545 N\/mm\u00b2.<\/td>\n<\/tr>\n
    Elongation (5d gauge length)<\/td>\nMin 14.5%<\/td>\nMin 12%<\/td>\n<\/tr>\n
    Bend Test<\/td>\nSuccessfully meets bend test requirements by withstanding 180\u00b0 bending around a mandrel of 3D for diameters up to and including 22 mm, and 4D for diameters above 22 mm.<\/td>\nSuccessfully meets bend test standards by withstanding 180\u00b0 bending around a mandrel of 4D for diameters up to and including 22 mm, and 5D for diameters above 22 mm.<\/td>\n<\/tr>\n
    Re-bend Test<\/td>\nSuccessfully satisfies re-bend test requirements by bending around a mandrel of 5D for diameters up to and including 10 mm, and 7D for diameters above 10 mm, with a 45\u00b0 initial bend followed by a 22.5\u00b0 reverse bend.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    CRS Manufacturing Process at JR Metal <\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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    At JR Metal, our Corrosion-Resistant Steel (CRS) Re-Bars are the result of a carefully engineered metallurgical process designed to strengthen the steel\u2019s resistance to environmental degradation. By adding select alloying elements during manufacturing, we significantly reduce the steel\u2019s susceptibility to corrosion.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Key Alloying Elements in JR CRS Re-Bars<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Copper (Cu)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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    Copper fills the micro-pores that typically form in rust layers, thereby preventing the penetration of oxygen and moisture. This slows down the corrosion process and enhances the bar’s durability in moisture-laden environments.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Chromium (Cr)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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    Chromium improves the passivity of the steel surface, making it less reactive to environmental elements. It enhances pitting resistance and forms an invisible, self-healing protective layer that guards against aggressive corrosion agents like chlorides.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Phosphorus (P)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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    Phosphorus acts as an anodic inhibitor, disrupting the electrochemical reactions responsible for corrosion. It slows down the corrosion rate, especially in marine and polluted environments, and contributes to the long-term stability of reinforced concrete structures.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    \n\t\t\t\n\t\n\t\n\t\n\t\n<\/svg>\t\t<\/div>\n\t\t\t\t
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    ” Through this precise chemical composition and controlled manufacturing process, JR CRS TMT Bars offer superior performance in aggressive conditions, delivering reliability, safety, and longevity for critical structures.”<\/em><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

    CRS Re-Bars (Corrosion-Resistant TMT Bars) Built to Endure. Engineered for Tough Environments. Corrosion is one of the most persistent and damaging threats to reinforced concrete structures. While it may not be entirely preventable, its onset can be significantly delayed through innovation and high-performance materials. Corrosion weakens the embedded steel, compromises structural strength, and leads to…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-19536","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/plugincomm.com\/jrmetalchennai\/wp-json\/wp\/v2\/pages\/19536","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/plugincomm.com\/jrmetalchennai\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/plugincomm.com\/jrmetalchennai\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/plugincomm.com\/jrmetalchennai\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/plugincomm.com\/jrmetalchennai\/wp-json\/wp\/v2\/comments?post=19536"}],"version-history":[{"count":55,"href":"https:\/\/plugincomm.com\/jrmetalchennai\/wp-json\/wp\/v2\/pages\/19536\/revisions"}],"predecessor-version":[{"id":19597,"href":"https:\/\/plugincomm.com\/jrmetalchennai\/wp-json\/wp\/v2\/pages\/19536\/revisions\/19597"}],"wp:attachment":[{"href":"https:\/\/plugincomm.com\/jrmetalchennai\/wp-json\/wp\/v2\/media?parent=19536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}