{"id":12304,"date":"2026-01-19T20:32:42","date_gmt":"2026-01-19T12:32:42","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=12304"},"modified":"2026-05-15T15:42:49","modified_gmt":"2026-05-15T07:42:49","slug":"hardness-conversion-table-for-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/hardness-conversion-table-for-tool-steel\/","title":{"rendered":"Tabla de conversi\u00f3n de dureza del acero: Rockwell C, Brinell, Vickers y escleroscopio"},"content":{"rendered":"\n<section class=\"aobo-hardness-page\">\n  <style>\n    .aobo-hardness-page {\n      --aobo-blue: #0c56d0;\n      --aobo-blue-dark: #16385f;\n      --aobo-blue-soft: #eaf4ff;\n      --aobo-blue-border: #d7e8fb;\n      --aobo-orange: #ff6b2c;\n      --aobo-orange-soft: #fff0e8;\n      --aobo-text: #23364d;\n      --aobo-muted: #52647a;\n      --aobo-bg: #f3f8ff;\n      font-family: Arial, Helvetica, sans-serif;\n      color: var(--aobo-text);\n      background: transparent;\n      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rgba(255, 255, 255, 0.82);\n      line-height: 1.7;\n      max-width: 760px;\n    }\n\n    .aobo-cta-actions {\n      display: flex;\n      flex-direction: column;\n      gap: 10px;\n      align-items: flex-start;\n    }\n\n    .aobo-cta a.aobo-mail-button {\n      display: inline-flex;\n      align-items: center;\n      justify-content: center;\n      min-height: 50px;\n      padding: 0 24px;\n      border-radius: 999px;\n      background: var(--aobo-orange);\n      color: #ffffff;\n      text-decoration: none;\n      font-weight: 700;\n      white-space: nowrap;\n      box-shadow: 0 12px 24px rgba(0, 0, 0, 0.18);\n    }\n\n    .aobo-email-text {\n      color: rgba(255, 255, 255, 0.76);\n      font-size: 14px;\n      line-height: 1.5;\n    }\n\n    .aobo-email-text strong {\n      color: #ffffff;\n    }\n\n    @media (max-width: 900px) {\n      .aobo-hardness-page {\n        padding: 0;\n      }\n\n      .aobo-hero,\n      .aobo-section,\n      .aobo-cta {\n        padding: 28px 22px;\n        border-radius: 22px;\n      }\n\n      .aobo-calc-grid,\n      .aobo-info-grid,\n      .aobo-cta {\n        grid-template-columns: 1fr;\n      }\n\n      .aobo-input-grid {\n        grid-template-columns: 1fr;\n      }\n\n      .aobo-cta a.aobo-mail-button {\n        width: 100%;\n      }\n    }\n  <\/style>\n\n  <div class=\"aobo-hardness-wrap\">\n    <div class=\"aobo-hero\">\n      <div class=\"aobo-kicker\">Aobo Steel Technical Tool<\/div>\n      <h1>Steel Hardness Conversion Calculator for Tool Steel<\/h1>\n      <p>\n        Enter one hardness value and calculate the nearest equivalent values. Use the HRC range for hardened tool steel, and use the HRB range for annealed or softer steel. The calculator does not force values outside the valid table range into a result.\n      <\/p>\n    <\/div>\n\n    <div class=\"aobo-calc-grid\">\n      <div class=\"aobo-calc-card\">\n        <div class=\"aobo-calc-head\">\n          <h2>Hardened Tool Steel \/ HRC Range<\/h2>\n          <p>\n            Use this range for hardened and tempered tool steels, including D2, A2, O1, S7, H11, H13, M2, M35, and M42. Valid input ranges: HRC 20-68, HV 238-940, HBW 226-739, HBS 226-500.\n          <\/p>\n        <\/div>\n\n        <div class=\"aobo-input-grid\">\n          <div class=\"aobo-field\">\n            <label for=\"hard-hrc\">HRC<\/label>\n            <input id=\"hard-hrc\" data-group=\"hard\" data-scale=\"hrc\" type=\"number\" step=\"0.1\" placeholder=\"Example: 60\">\n          <\/div>\n          <div class=\"aobo-field\">\n            <label for=\"hard-hv\">HV<\/label>\n            <input id=\"hard-hv\" data-group=\"hard\" data-scale=\"hv\" type=\"number\" step=\"0.1\" placeholder=\"Example: 697\">\n          <\/div>\n          <div class=\"aobo-field\">\n            <label for=\"hard-hbw\">HBW<\/label>\n            <input id=\"hard-hbw\" data-group=\"hard\" data-scale=\"hbw\" type=\"number\" step=\"0.1\" placeholder=\"Example: 654\">\n          <\/div>\n          <div class=\"aobo-field\">\n            <label for=\"hard-hbs\">HBS<\/label>\n            <input id=\"hard-hbs\" data-group=\"hard\" data-scale=\"hbs\" type=\"number\" step=\"0.1\" placeholder=\"Example: 371\">\n          <\/div>\n        <\/div>\n\n        <div class=\"aobo-button-row\">\n          <button class=\"aobo-btn aobo-btn-primary\" type=\"button\" id=\"hard-calculate\">Calculate<\/button>\n          <button class=\"aobo-btn aobo-btn-secondary\" type=\"button\" id=\"hard-reset\">Reset<\/button>\n        <\/div>\n\n        <div class=\"aobo-result-note\" id=\"hard-note\">\n          Enter one value above. The calculator uses the last edited field as the input source.\n        <\/div>\n      <\/div>\n\n      <div class=\"aobo-calc-card soft\">\n        <div class=\"aobo-calc-head\">\n          <h2>Annealed or Soft Steel \/ HRB Range<\/h2>\n          <p>\n            Use this range for annealed, normalized, or softer steel where HRC is not suitable. This range is useful when reviewing MTC hardness values or soft supply hardness. Valid input ranges: HRB 55-100, HV 100-240, HBS 100-240.\n          <\/p>\n        <\/div>\n\n        <div class=\"aobo-input-grid\">\n          <div class=\"aobo-field\">\n            <label for=\"soft-hrb\">HRB<\/label>\n            <input id=\"soft-hrb\" data-group=\"soft\" data-scale=\"hrb\" type=\"number\" step=\"0.1\" placeholder=\"Example: 95\">\n          <\/div>\n          <div class=\"aobo-field\">\n            <label for=\"soft-hv\">HV<\/label>\n            <input id=\"soft-hv\" data-group=\"soft\" data-scale=\"hv\" type=\"number\" step=\"0.1\" placeholder=\"Example: 210\">\n          <\/div>\n          <div class=\"aobo-field\">\n            <label for=\"soft-hbs\">HBS<\/label>\n            <input id=\"soft-hbs\" data-group=\"soft\" data-scale=\"hbs\" type=\"number\" step=\"0.1\" placeholder=\"Example: 210\">\n          <\/div>\n        <\/div>\n\n        <div class=\"aobo-button-row\">\n          <button class=\"aobo-btn aobo-btn-orange\" type=\"button\" id=\"soft-calculate\">Calculate<\/button>\n          <button class=\"aobo-btn aobo-btn-secondary\" type=\"button\" id=\"soft-reset\">Reset<\/button>\n        <\/div>\n\n        <div class=\"aobo-result-note\" id=\"soft-note\">\n          Enter one value above. The calculator uses the last edited field as the input source.\n        <\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"aobo-warning\">\n      The values are approximate equivalents, not exact conversions. Use them for comparison and communication. For inspection, acceptance, or MTC confirmation, test hardness by the method specified in the order or standard.\n    <\/div>\n\n    <div class=\"aobo-section\">\n      <h2>Which Range Should You Use?<\/h2>\n      <p class=\"aobo-section-intro\">\n        Use the HRC range when the steel has been hardened and tempered. Use the HRB range when the steel is still soft, annealed, or normalized. This separation prevents low HB or HV values from being incorrectly matched to a hardened steel range.\n      <\/p>\n\n      <div class=\"aobo-info-grid\">\n        <div class=\"aobo-info-card\">\n          <strong>HRC for hardened tool steel<\/strong>\n          <span>\n            HRC is the common working hardness scale for hardened tool steel, such as D2 at 58-60 HRC, H13 at 44-52 HRC, or high-speed steel above 60 HRC.\n          <\/span>\n        <\/div>\n\n        <div class=\"aobo-info-card\">\n          <strong>HB and HRB for soft supply<\/strong>\n          <span>\n            Annealed tool steel is usually checked by Brinell hardness. Many supply specifications and MTCs use values such as maximum 229 HB or maximum 255 HB.\n          <\/span>\n        <\/div>\n\n        <div class=\"aobo-info-card\">\n          <strong>HV for technical comparison<\/strong>\n          <span>\n            HV is common in technical references, inspection reports, surface hardness checks, and heat-treatment data. It is useful for comparison, but it does not replace the required test method.\n          <\/span>\n        <\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"aobo-section\">\n      <h2>Data Source and Use Limit<\/h2>\n      <p class=\"aobo-section-intro\">\n        The calculation data are simplified from ASTM E140 hardness conversion tables for non-austenitic steels. The HRC range is based on the Rockwell C hardness range table, and the HRB range is based on the Rockwell B hardness range table. For this tool steel calculator, only the practical front-end scales are retained: HRC, HRB, HV, HBS, and HBW.\n      <\/p>\n\n      <div class=\"aobo-source-box\">\n        <h3>Why the values are approximate<\/h3>\n        <p>\n          Rockwell, Brinell, and Vickers tests use different indenters, loads, indentation shapes, and measurement principles. A value such as 60 HRC can be compared with about 697 HV, but it is not a mathematical unit conversion like millimeters to inches.\n        <\/p>\n        <p>\n          Tool steel grade, carbide distribution, heat treatment condition, surface preparation, sample thickness, and testing equipment can all affect the reading. Use the converted value for quick comparison, not for final acceptance.\n        <\/p>\n      <\/div>\n    <\/div>\n\n    <div class=\"aobo-section\">\n      <h2>Aobo Steel Supply Note<\/h2>\n      <p class=\"aobo-section-intro\">\n        Aobo Steel supplies tool steel round bar and plate mainly in annealed condition. Final hardening and tempering should be carried out by the customer or a qualified heat-treatment facility. For bulk tool steel supply, MTC requirements, and grade selection support, contact our sales team before ordering.\n      <\/p>\n    <\/div>\n\n    <div class=\"aobo-cta\">\n      <div>\n        <h2>Need Tool Steel Supplied in Annealed Condition?<\/h2>\n        <p>\n          Aobo Steel supports bulk orders of tool steel round bar and plate, with MTC per order and practical grade selection support for distributors, stockists, and industrial buyers.\n        <\/p>\n      <\/div>\n\n      <div class=\"aobo-cta-actions\">\n        <a class=\"aobo-mail-button\" href=\"mailto:sales@aobosteel.com?subject=Tool%20Steel%20Inquiry%20from%20Hardness%20Conversion%20Page&#038;body=Hello%20Aobo%20Steel%2C%0D%0A%0D%0AI%20would%20like%20to%20inquire%20about%20tool%20steel%20supply.%0D%0A%0D%0AMaterial%20grade%3A%20%0D%0ASize%3A%20%0D%0AQuantity%3A%20%0D%0ADelivery%20country%3A%20%0D%0A%0D%0AThank%20you.\">\n          Contact sales@aobosteel.com\n        <\/a>\n        <div class=\"aobo-email-text\">\n          Click the button to open your email client, or send your inquiry directly to <strong>sales@aobosteel.com<\/strong>.\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <script>\n    (function () {\n      var defaultPlaceholders = {\n        \"hard-hrc\": \"Example: 60\",\n        \"hard-hv\": \"Example: 697\",\n        \"hard-hbw\": \"Example: 654\",\n        \"hard-hbs\": \"Example: 371\",\n        \"soft-hrb\": \"Example: 95\",\n        \"soft-hv\": \"Example: 210\",\n        \"soft-hbs\": \"Example: 210\"\n      };\n\n      var notListedText = \"Not listed in source table\";\n\n      var hrcData = [\n        { hrc: 68, hv: 940, hbs: null, hbw: null },\n        { hrc: 67, hv: 900, hbs: null, hbw: null },\n        { hrc: 66, hv: 865, hbs: null, hbw: null },\n        { hrc: 65, hv: 832, hbs: null, hbw: 739 },\n        { hrc: 64, hv: 800, hbs: null, hbw: 722 },\n        { hrc: 63, hv: 772, hbs: null, hbw: 705 },\n        { hrc: 62, hv: 746, hbs: null, hbw: 688 },\n        { hrc: 61, hv: 720, hbs: null, hbw: 670 },\n        { hrc: 60, hv: 697, hbs: null, hbw: 654 },\n        { hrc: 59, hv: 674, hbs: null, hbw: 634 },\n        { hrc: 58, hv: 653, hbs: null, hbw: 615 },\n        { hrc: 57, hv: 633, hbs: null, hbw: 595 },\n        { hrc: 56, hv: 613, hbs: null, hbw: 577 },\n        { hrc: 55, hv: 595, hbs: null, hbw: 560 },\n        { hrc: 54, hv: 577, hbs: null, hbw: 543 },\n        { hrc: 53, hv: 560, hbs: null, hbw: 525 },\n        { hrc: 52, hv: 544, hbs: 500, hbw: 512 },\n        { hrc: 51, hv: 528, hbs: 487, hbw: 496 },\n        { hrc: 50, hv: 513, hbs: 475, hbw: 481 },\n        { hrc: 49, hv: 498, hbs: 464, hbw: 469 },\n        { hrc: 48, hv: 484, hbs: 451, hbw: 455 },\n        { hrc: 47, hv: 471, hbs: 442, hbw: 443 },\n        { hrc: 46, hv: 458, hbs: 432, hbw: 432 },\n        { hrc: 45, hv: 446, hbs: 421, hbw: 421 },\n        { hrc: 44, hv: 434, hbs: 409, hbw: 409 },\n        { hrc: 43, hv: 423, hbs: 400, hbw: 400 },\n        { hrc: 42, hv: 412, hbs: 390, hbw: 390 },\n        { hrc: 41, hv: 402, hbs: 381, hbw: 381 },\n        { hrc: 40, hv: 392, hbs: 371, hbw: 371 },\n        { hrc: 39, hv: 382, hbs: 362, hbw: 362 },\n        { hrc: 38, hv: 372, hbs: 353, hbw: 353 },\n        { hrc: 37, hv: 363, hbs: 344, hbw: 344 },\n        { hrc: 36, hv: 354, hbs: 336, hbw: 336 },\n        { hrc: 35, hv: 345, hbs: 327, hbw: 327 },\n        { hrc: 34, hv: 336, hbs: 319, hbw: 319 },\n        { hrc: 33, hv: 327, hbs: 311, hbw: 311 },\n        { hrc: 32, hv: 318, hbs: 301, hbw: 301 },\n        { hrc: 31, hv: 310, hbs: 294, hbw: 294 },\n        { hrc: 30, hv: 302, hbs: 286, hbw: 286 },\n        { hrc: 29, hv: 294, hbs: 279, hbw: 279 },\n        { hrc: 28, hv: 286, hbs: 271, hbw: 271 },\n        { hrc: 27, hv: 279, hbs: 264, hbw: 264 },\n        { hrc: 26, hv: 272, hbs: 258, hbw: 258 },\n        { hrc: 25, hv: 266, hbs: 253, hbw: 253 },\n        { hrc: 24, hv: 260, hbs: 247, hbw: 247 },\n        { hrc: 23, hv: 254, hbs: 243, hbw: 243 },\n        { hrc: 22, hv: 248, hbs: 237, hbw: 237 },\n        { hrc: 21, hv: 243, hbs: 231, hbw: 231 },\n        { hrc: 20, hv: 238, hbs: 226, hbw: 226 }\n      ];\n\n      var hrbData = [\n        { hrb: 100, hv: 240, hbs: 240 },\n        { hrb: 99, hv: 234, hbs: 234 },\n        { hrb: 98, hv: 228, hbs: 228 },\n        { hrb: 97, hv: 222, hbs: 222 },\n        { hrb: 96, hv: 216, hbs: 216 },\n        { hrb: 95, hv: 210, hbs: 210 },\n        { hrb: 94, hv: 205, hbs: 205 },\n        { hrb: 93, hv: 200, hbs: 200 },\n        { hrb: 92, hv: 195, hbs: 195 },\n        { hrb: 91, hv: 190, hbs: 190 },\n        { hrb: 90, hv: 185, hbs: 185 },\n        { hrb: 89, hv: 180, hbs: 180 },\n        { hrb: 88, hv: 176, hbs: 176 },\n        { hrb: 87, hv: 172, hbs: 172 },\n        { hrb: 86, hv: 169, hbs: 169 },\n        { hrb: 85, hv: 165, hbs: 165 },\n        { hrb: 84, hv: 162, hbs: 162 },\n        { hrb: 83, hv: 159, hbs: 159 },\n        { hrb: 82, hv: 156, hbs: 156 },\n        { hrb: 81, hv: 153, hbs: 153 },\n        { hrb: 80, hv: 150, hbs: 150 },\n        { hrb: 79, hv: 147, hbs: 147 },\n        { hrb: 78, hv: 144, hbs: 144 },\n        { hrb: 77, hv: 141, hbs: 141 },\n        { hrb: 76, hv: 139, hbs: 139 },\n        { hrb: 75, hv: 137, hbs: 137 },\n        { hrb: 74, hv: 135, hbs: 135 },\n        { hrb: 73, hv: 132, hbs: 132 },\n        { hrb: 72, hv: 130, hbs: 130 },\n        { hrb: 71, hv: 127, hbs: 127 },\n        { hrb: 70, hv: 125, hbs: 125 },\n        { hrb: 69, hv: 123, hbs: 123 },\n        { hrb: 68, hv: 121, hbs: 121 },\n        { hrb: 67, hv: 119, hbs: 119 },\n        { hrb: 66, hv: 117, hbs: 117 },\n        { hrb: 65, hv: 116, hbs: 116 },\n        { hrb: 64, hv: 114, hbs: 114 },\n        { hrb: 63, hv: 112, hbs: 112 },\n        { hrb: 62, hv: 110, hbs: 110 },\n        { hrb: 61, hv: 108, hbs: 108 },\n        { hrb: 60, hv: 107, hbs: 107 },\n        { hrb: 59, hv: 106, hbs: 106 },\n        { hrb: 58, hv: 104, hbs: 104 },\n        { hrb: 57, hv: 103, hbs: 103 },\n        { hrb: 56, hv: 101, hbs: 101 },\n        { hrb: 55, hv: 100, hbs: 100 }\n      ];\n\n      var lastEdited = {\n        hard: \"hrc\",\n        soft: \"hrb\"\n      };\n\n      var rangeRules = {\n        hard: {\n          hrc: { min: 20, max: 68, label: \"HRC\" },\n          hv: { min: 238, max: 940, label: \"HV\" },\n          hbw: { min: 226, max: 739, label: \"HBW\" },\n          hbs: { min: 226, max: 500, label: \"HBS\" }\n        },\n        soft: {\n          hrb: { min: 55, max: 100, label: \"HRB\" },\n          hv: { min: 100, max: 240, label: \"HV\" },\n          hbs: { min: 100, max: 240, label: \"HBS\" }\n        }\n      };\n\n      function getInput(group, scale) {\n        return document.querySelector('input[data-group=\"' + group + '\"][data-scale=\"' + scale + '\"]');\n      }\n\n      function getInputs(group) {\n        return document.querySelectorAll('input[data-group=\"' + group + '\"]');\n      }\n\n      function resetFieldState(input) {\n        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}\n\n      function setActiveInput(group, scale) {\n        var inputs = getInputs(group);\n\n        for (var i = 0; i < inputs.length; i++) {\n          inputs[i].classList.remove(\"aobo-active-input\");\n          inputs[i].classList.remove(\"aobo-invalid-input\");\n        }\n\n        var active = getInput(group, scale);\n\n        if (active) {\n          active.classList.add(\"aobo-active-input\");\n        }\n      }\n\n      function setError(group, scale, message) {\n        var note = document.getElementById(group + \"-note\");\n        var input = getInput(group, scale);\n        var inputs = getInputs(group);\n\n        for (var i = 0; i < inputs.length; i++) {\n          inputs[i].classList.remove(\"aobo-invalid-input\");\n        }\n\n        if (input) {\n          input.classList.add(\"aobo-invalid-input\");\n        }\n\n        note.classList.add(\"aobo-error\");\n        note.textContent = message;\n      }\n\n      function setNormalNote(group, message) {\n        var note = document.getElementById(group + \"-note\");\n        note.classList.remove(\"aobo-error\");\n        note.textContent = message;\n      }\n\n      function isWithinRange(group, scale, value) {\n        var rule = rangeRules[group][scale];\n\n        if (!rule) {\n          return true;\n        }\n\n        return value >= rule.min && value <= rule.max;\n      }\n\n      function rangeMessage(group, scale) {\n        var rule = rangeRules[group][scale];\n\n        if (!rule) {\n          return \"\";\n        }\n\n        if (group === \"hard\") {\n          return rule.label + \" must be between \" + rule.min + \" and \" + rule.max + \" in the HRC range. For lower soft-condition values, use the HRB range calculator.\";\n        }\n\n        return rule.label + \" must be between \" + rule.min + \" and \" + rule.max + \" in the HRB range. For hardened tool steel values, use the HRC range calculator.\";\n      }\n\n      function findNearest(data, scale, value) {\n        var nearest = null;\n        var nearestDiff = Infinity;\n\n        for (var i = 0; i < data.length; i++) {\n          var itemValue = data[i][scale];\n\n          if (itemValue === null || itemValue === undefined || itemValue === \"\") {\n            continue;\n          }\n\n          var diff = Math.abs(Number(itemValue) - Number(value));\n\n          if (diff < nearestDiff) {\n            nearestDiff = diff;\n            nearest = data[i];\n          }\n        }\n\n        return nearest;\n      }\n\n      function clearGroup(group) {\n        var inputs = getInputs(group);\n\n        for (var i = 0; i < inputs.length; i++) {\n          inputs[i].value = \"\";\n          resetFieldState(inputs[i]);\n        }\n\n        resetPlaceholders(group);\n\n        if (group === \"hard\") {\n          lastEdited.hard = \"hrc\";\n          setNormalNote(\"hard\", \"Enter one value above. The calculator uses the last edited field as the input source.\");\n        } else {\n          lastEdited.soft = \"hrb\";\n          setNormalNote(\"soft\", \"Enter one value above. The calculator uses the last edited field as the input source.\");\n        }\n      }\n\n      function fillHard(row) {\n        showValueOrNotListed(\"hard-hrc\", row.hrc);\n        showValueOrNotListed(\"hard-hv\", row.hv);\n        showValueOrNotListed(\"hard-hbw\", row.hbw);\n        showValueOrNotListed(\"hard-hbs\", row.hbs);\n      }\n\n      function fillSoft(row) {\n        showValueOrNotListed(\"soft-hrb\", row.hrb);\n        showValueOrNotListed(\"soft-hv\", row.hv);\n        showValueOrNotListed(\"soft-hbs\", row.hbs);\n      }\n\n      function calculateHard() {\n        var group = \"hard\";\n        var scale = lastEdited.hard;\n        var input = getInput(group, scale);\n        var value = Number(input.value);\n\n        resetPlaceholders(group);\n\n        if (!input.value || isNaN(value)) {\n          setError(group, scale, \"Enter a valid number in one HRC range field.\");\n          return;\n        }\n\n        if (!isWithinRange(group, scale, value)) {\n          setError(group, scale, rangeMessage(group, scale));\n          return;\n        }\n\n        var row = findNearest(hrcData, scale, value);\n\n        if (!row) {\n          setError(group, scale, \"No listed value is available for this input in the HRC range.\");\n          return;\n        }\n\n        fillHard(row);\n        setActiveInput(group, scale);\n\n        setNormalNote(\n          group,\n          \"Input \" + value + \" \" + scale.toUpperCase() +\n          \" was matched to the nearest listed HRC-range row. If a field shows \u201cNot listed in source table,\u201d that value is not provided in the source table.\"\n        );\n      }\n\n      function calculateSoft() {\n        var group = \"soft\";\n        var scale = lastEdited.soft;\n        var input = getInput(group, scale);\n        var value = Number(input.value);\n\n        resetPlaceholders(group);\n\n        if (!input.value || isNaN(value)) {\n          setError(group, scale, \"Enter a valid number in one HRB range field.\");\n          return;\n        }\n\n        if (!isWithinRange(group, scale, value)) {\n          setError(group, scale, rangeMessage(group, scale));\n          return;\n        }\n\n        var row = findNearest(hrbData, scale, value);\n\n        if (!row) {\n          setError(group, scale, \"No listed value is available for this input in the HRB range.\");\n          return;\n        }\n\n        fillSoft(row);\n        setActiveInput(group, scale);\n\n        setNormalNote(\n          group,\n          \"Input \" + value + \" \" + scale.toUpperCase() +\n          \" was matched to the nearest listed HRB-range row. If a field shows \u201cNot listed in source table,\u201d that value is not provided in the source table.\"\n        );\n      }\n\n      var allInputs = document.querySelectorAll(\".aobo-hardness-page input[data-group]\");\n\n      for (var i = 0; i < allInputs.length; i++) {\n        allInputs[i].addEventListener(\"input\", function () {\n          var group = this.getAttribute(\"data-group\");\n          var scale = this.getAttribute(\"data-scale\");\n\n          lastEdited[group] = scale;\n\n          resetPlaceholders(group);\n          setActiveInput(group, scale);\n          document.getElementById(group + \"-note\").classList.remove(\"aobo-error\");\n        });\n\n        allInputs[i].addEventListener(\"keydown\", function (event) {\n          if (event.key === \"Enter\") {\n            var group = this.getAttribute(\"data-group\");\n\n            if (group === \"hard\") {\n              calculateHard();\n            } else {\n              calculateSoft();\n            }\n          }\n        });\n      }\n\n      document.getElementById(\"hard-calculate\").addEventListener(\"click\", calculateHard);\n      document.getElementById(\"soft-calculate\").addEventListener(\"click\", calculateSoft);\n\n      document.getElementById(\"hard-reset\").addEventListener(\"click\", function () {\n        clearGroup(\"hard\");\n      });\n\n      document.getElementById(\"soft-reset\").addEventListener(\"click\", function () {\n        clearGroup(\"soft\");\n      });\n    })();\n  <\/script>\n<\/section>\n\n","protected":false},"excerpt":{"rendered":"<p>Aobo Steel Technical Tool Steel Hardness Conversion Calculator for Tool Steel Enter one hardness value and calculate the nearest equivalent values. Use the HRC range for hardened tool steel, and use the HRB range for annealed or softer steel. The calculator does not force values outside the valid table range into a result. Hardened Tool [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15117,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"","_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"normal-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-12304","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Steel Hardness Conversion Chart: Rockwell C, Brinell, Vickers &amp; Scleroscope - AoboSteel<\/title>\n<meta name=\"description\" content=\"Quickly convert Rockwell C (HRC) to Brinell (HB), Vickers (HV), and Scleroscope (HSD) for tool steels. 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