{"id":16787,"date":"2025-11-25T03:19:49","date_gmt":"2025-11-25T03:19:49","guid":{"rendered":"https:\/\/onmytoolings.com\/?page_id=16787"},"modified":"2026-11-03T05:40:21","modified_gmt":"2026-11-03T05:40:21","slug":"tabelle-zur-umrechnung-der-stahlharte","status":"publish","type":"page","link":"https:\/\/onmytoolings.com\/de\/machining-calculator\/steel-hardness-conversion-calculator-table\/","title":{"rendered":"Umrechnungstabelle f\u00fcr Stahlh\u00e4rte"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"16787\" class=\"elementor elementor-16787\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-efc2be5 e-flex e-con-boxed e-con e-parent\" data-id=\"efc2be5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b398834 elementor-widget elementor-widget-html\" data-id=\"b398834\" 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.om-hc-result-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.om-hc .om-hc-cta-panel{grid-template-columns:1fr}.om-hc .om-hc-cta-actions{justify-content:flex-start}}\r\n@media(max-width:520px){.om-hc{padding:16px;border-radius:8px}.om-hc .om-hc-grid,.om-hc .om-hc-result-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.om-hc .om-hc-result{padding:11px 9px}.om-hc .om-hc-result strong{font-size:20px}.om-hc .om-hc-range{grid-template-columns:1fr;gap:6px}.om-hc .om-hc-actions button{flex:1;padding:10px}.om-hc .om-hc-cta-actions a{width:100%}}\r\n@media(prefers-reduced-motion:reduce){.om-hc button,.om-hc .om-hc-cta{transition:none}}\r\n<\/style>\r\n<section class=\"om-hc\" data-onmy-hardness-calculator aria-label=\"Steel hardness conversion calculator and reference tables\">\r\n  <div class=\"om-hc-intro\"><span class=\"om-hc-badge\">FREE METALWORKING TOOL<\/span><\/div>\r\n  <!-- Your WordPress\/Elementor page title should supply the page-level H1. -->\r\n  <h2>Steel Hardness Conversion Calculator &amp; Tables<\/h2>\r\n  <p class=\"om-hc-subtitle\">Convert Vickers (HV), Brinell (HBW\/HBS), Rockwell C (HRC), and Rockwell B (HRB) values for non-austenitic steels using separate hard- and soft-steel reference data.<\/p>\r\n\r\n  <div class=\"om-hc-panel\">\r\n    <h3>Hardness Conversion Calculator<\/h3>\r\n    <p>Enter a hardness value into <strong>one<\/strong> field. The other three fields will clear automatically if you change the input scale. Press <strong>Calculate<\/strong> to view approximate equivalent readings.<\/p>\r\n    <form data-om-hc-form novalidate>\r\n      <div class=\"om-hc-grid\">\r\n        <div class=\"om-hc-field\"><label>Vickers (HV)<input type=\"number\" inputmode=\"decimal\" min=\"0\" step=\"any\" placeholder=\"e.g. 392\" data-om-hc-input=\"hv\" autocomplete=\"off\"><\/label><div class=\"om-hc-hint\">Table-dependent range<\/div><\/div>\r\n        <div class=\"om-hc-field\"><label>Brinell (HB)<input type=\"number\" inputmode=\"decimal\" min=\"0\" step=\"any\" placeholder=\"e.g. 371\" data-om-hc-input=\"hb\" autocomplete=\"off\"><\/label><div class=\"om-hc-hint\">HBW\/HBS reference values<\/div><\/div>\r\n        <div class=\"om-hc-field\"><label>Rockwell C (HRC)<input type=\"number\" inputmode=\"decimal\" min=\"0\" step=\"any\" placeholder=\"e.g. 40\" data-om-hc-input=\"hrc\" autocomplete=\"off\"><\/label><div class=\"om-hc-hint\">20\u201368 HRC<\/div><\/div>\r\n        <div class=\"om-hc-field\"><label>Rockwell B (HRB)<input type=\"number\" inputmode=\"decimal\" min=\"0\" step=\"any\" placeholder=\"e.g. 85\" data-om-hc-input=\"hrb\" autocomplete=\"off\"><\/label><div class=\"om-hc-hint\">55\u2013100 HRB<\/div><\/div>\r\n      <\/div>\r\n      <div class=\"om-hc-range\">\r\n        <div><label for=\"om-hc-table-choice\">Reference range<\/label><select id=\"om-hc-table-choice\" data-om-hc-range><option value=\"auto\">Auto (recommended)<\/option><option value=\"c\">Harder steel \u2014 HRC table<\/option><option value=\"b\">Softer steel \u2014 HRB table<\/option><\/select><\/div>\r\n        <p class=\"om-hc-range-note\">For HV or HB values near the overlap, the two ASTM reference ranges do not give identical equivalents. Choose the range matching your material\/test scale; automatic mode asks you to decide instead of guessing.<\/p>\r\n      <\/div>\r\n      <div class=\"om-hc-actions\"><button type=\"submit\" class=\"om-hc-calculate\">Calculate<\/button><button type=\"button\" class=\"om-hc-clear\" data-om-hc-clear>Clear<\/button><\/div>\r\n      <p class=\"om-hc-status\" role=\"status\" aria-live=\"polite\" data-om-hc-status>Enter one known hardness value to begin.<\/p>\r\n    <\/form>\r\n    <div class=\"om-hc-results\" data-om-hc-results hidden>\r\n      <p class=\"om-hc-result-heading\" data-om-hc-source>Approximate converted values<\/p>\r\n      <div class=\"om-hc-result-grid\">\r\n        <div class=\"om-hc-result\"><small>Vickers (HV)<\/small><strong data-om-hc-output=\"hv\">\u2014<\/strong><\/div>\r\n        <div class=\"om-hc-result\"><small>Brinell (HB)<\/small><strong data-om-hc-output=\"hb\">\u2014<\/strong><\/div>\r\n        <div class=\"om-hc-result\"><small>Rockwell C (HRC)<\/small><strong data-om-hc-output=\"hrc\">\u2014<\/strong><\/div>\r\n        <div class=\"om-hc-result\"><small>Rockwell B (HRB)<\/small><strong data-om-hc-output=\"hrb\">\u2014<\/strong><\/div>\r\n      <\/div>\r\n      <p class=\"om-hc-result-context\" data-om-hc-result-note><\/p>\r\n    <\/div>\r\n    <p class=\"om-hc-note\">Approximate, table-based conversion with linear interpolation between adjacent entries. No extrapolation. N\/A means that scale is not provided in the selected reference range. Do not use converted values in place of direct testing for certification or acceptance.<\/p>\r\n  <\/div>\r\n\r\n  <div class=\"om-hc-section\">\r\n    <h3>Hardness Conversion Reference Tables<\/h3>\r\n    <p>There is no single universally valid HV\u2013HB\u2013HRC\u2013HRB conversion curve. For steel, ASTM E140 separates the Rockwell C and Rockwell B reference ranges. The two tables below are shown independently rather than combined into misleading four-scale rows.<\/p>\r\n    <div class=\"om-hc-table-card\">\r\n      <div class=\"om-hc-table-wrap\"><table data-om-hc-table=\"c\">\r\n        <caption>Table A \u2014 Rockwell C range (harder non-austenitic steel)<\/caption>\r\n        <thead><tr><th scope=\"col\">Rockwell C (HRC)<\/th><th scope=\"col\">Vickers (HV)<\/th><th scope=\"col\">Brinell (HB)<\/th><\/tr><\/thead>\r\n        <tbody>\r\n                  <tr><td>68<\/td><td>940<\/td><td>\u2014<\/td><\/tr>\r\n                  <tr><td>67<\/td><td>900<\/td><td>\u2014<\/td><\/tr>\r\n                  <tr><td>66<\/td><td>865<\/td><td>\u2014<\/td><\/tr>\r\n                  <tr><td>65<\/td><td>832<\/td><td>739<\/td><\/tr>\r\n                  <tr><td>64<\/td><td>800<\/td><td>722<\/td><\/tr>\r\n                  <tr><td>63<\/td><td>772<\/td><td>705<\/td><\/tr>\r\n                  <tr><td>62<\/td><td>746<\/td><td>688<\/td><\/tr>\r\n                  <tr><td>61<\/td><td>720<\/td><td>670<\/td><\/tr>\r\n                  <tr><td>60<\/td><td>697<\/td><td>654<\/td><\/tr>\r\n                  <tr><td>59<\/td><td>674<\/td><td>634<\/td><\/tr>\r\n                  <tr><td>58<\/td><td>653<\/td><td>615<\/td><\/tr>\r\n                  <tr><td>57<\/td><td>633<\/td><td>595<\/td><\/tr>\r\n                  <tr><td>56<\/td><td>613<\/td><td>577<\/td><\/tr>\r\n                  <tr><td>55<\/td><td>595<\/td><td>560<\/td><\/tr>\r\n                  <tr><td>54<\/td><td>577<\/td><td>543<\/td><\/tr>\r\n                  <tr><td>53<\/td><td>560<\/td><td>525<\/td><\/tr>\r\n                  <tr><td>52<\/td><td>544<\/td><td>512<\/td><\/tr>\r\n                  <tr><td>51<\/td><td>528<\/td><td>496<\/td><\/tr>\r\n                  <tr><td>50<\/td><td>513<\/td><td>481<\/td><\/tr>\r\n                  <tr><td>49<\/td><td>498<\/td><td>469<\/td><\/tr>\r\n                  <tr><td>48<\/td><td>484<\/td><td>455<\/td><\/tr>\r\n                  <tr><td>47<\/td><td>471<\/td><td>443<\/td><\/tr>\r\n                  <tr><td>46<\/td><td>458<\/td><td>432<\/td><\/tr>\r\n                  <tr><td>45<\/td><td>446<\/td><td>421<\/td><\/tr>\r\n                  <tr><td>44<\/td><td>434<\/td><td>409<\/td><\/tr>\r\n                  <tr><td>43<\/td><td>423<\/td><td>400<\/td><\/tr>\r\n                  <tr><td>42<\/td><td>412<\/td><td>390<\/td><\/tr>\r\n                  <tr><td>41<\/td><td>402<\/td><td>381<\/td><\/tr>\r\n                  <tr><td>40<\/td><td>392<\/td><td>371<\/td><\/tr>\r\n                  <tr><td>39<\/td><td>382<\/td><td>362<\/td><\/tr>\r\n                  <tr><td>38<\/td><td>372<\/td><td>353<\/td><\/tr>\r\n                  <tr><td>37<\/td><td>363<\/td><td>344<\/td><\/tr>\r\n                  <tr><td>36<\/td><td>354<\/td><td>336<\/td><\/tr>\r\n                  <tr><td>35<\/td><td>345<\/td><td>327<\/td><\/tr>\r\n                  <tr><td>34<\/td><td>336<\/td><td>319<\/td><\/tr>\r\n                  <tr><td>33<\/td><td>327<\/td><td>311<\/td><\/tr>\r\n                  <tr><td>32<\/td><td>318<\/td><td>301<\/td><\/tr>\r\n                  <tr><td>31<\/td><td>310<\/td><td>294<\/td><\/tr>\r\n                  <tr><td>30<\/td><td>302<\/td><td>286<\/td><\/tr>\r\n                  <tr><td>29<\/td><td>294<\/td><td>279<\/td><\/tr>\r\n                  <tr><td>28<\/td><td>286<\/td><td>271<\/td><\/tr>\r\n                  <tr><td>27<\/td><td>279<\/td><td>264<\/td><\/tr>\r\n                  <tr><td>26<\/td><td>272<\/td><td>258<\/td><\/tr>\r\n                  <tr><td>25<\/td><td>266<\/td><td>253<\/td><\/tr>\r\n                  <tr><td>24<\/td><td>260<\/td><td>247<\/td><\/tr>\r\n                  <tr><td>23<\/td><td>254<\/td><td>243<\/td><\/tr>\r\n                  <tr><td>22<\/td><td>248<\/td><td>237<\/td><\/tr>\r\n                  <tr><td>21<\/td><td>243<\/td><td>231<\/td><\/tr>\r\n                  <tr><td>20<\/td><td>238<\/td><td>226<\/td><\/tr>\r\n        <\/tbody>\r\n      <\/table><\/div>\r\n      <p class=\"om-hc-note\">HRC reference range: 20\u201368. Brinell equivalents above about 55 HRC, where listed, are particularly approximate; no Brinell equivalents are shown above 65 HRC.<\/p>\r\n    <\/div>\r\n    <div class=\"om-hc-table-card\">\r\n      <div class=\"om-hc-table-wrap\"><table data-om-hc-table=\"b\">\r\n        <caption>Table B \u2014 Rockwell B range (softer non-austenitic steel)<\/caption>\r\n        <thead><tr><th scope=\"col\">Rockwell B (HRB)<\/th><th scope=\"col\">Vickers (HV)<\/th><th scope=\"col\">Brinell (HB)<\/th><\/tr><\/thead>\r\n        <tbody>\r\n                  <tr><td>100<\/td><td>240<\/td><td>240<\/td><\/tr>\r\n                  <tr><td>99<\/td><td>234<\/td><td>234<\/td><\/tr>\r\n                  <tr><td>98<\/td><td>228<\/td><td>228<\/td><\/tr>\r\n                  <tr><td>97<\/td><td>222<\/td><td>222<\/td><\/tr>\r\n                  <tr><td>96<\/td><td>216<\/td><td>216<\/td><\/tr>\r\n                  <tr><td>95<\/td><td>210<\/td><td>210<\/td><\/tr>\r\n                  <tr><td>94<\/td><td>205<\/td><td>205<\/td><\/tr>\r\n                  <tr><td>93<\/td><td>200<\/td><td>200<\/td><\/tr>\r\n                  <tr><td>92<\/td><td>195<\/td><td>195<\/td><\/tr>\r\n                  <tr><td>91<\/td><td>190<\/td><td>190<\/td><\/tr>\r\n                  <tr><td>90<\/td><td>185<\/td><td>185<\/td><\/tr>\r\n                  <tr><td>89<\/td><td>180<\/td><td>180<\/td><\/tr>\r\n                  <tr><td>88<\/td><td>176<\/td><td>176<\/td><\/tr>\r\n                  <tr><td>87<\/td><td>172<\/td><td>172<\/td><\/tr>\r\n                  <tr><td>86<\/td><td>169<\/td><td>169<\/td><\/tr>\r\n                  <tr><td>85<\/td><td>165<\/td><td>165<\/td><\/tr>\r\n                  <tr><td>84<\/td><td>162<\/td><td>162<\/td><\/tr>\r\n                  <tr><td>83<\/td><td>159<\/td><td>159<\/td><\/tr>\r\n                  <tr><td>82<\/td><td>156<\/td><td>156<\/td><\/tr>\r\n                  <tr><td>81<\/td><td>153<\/td><td>153<\/td><\/tr>\r\n                  <tr><td>80<\/td><td>150<\/td><td>150<\/td><\/tr>\r\n                  <tr><td>79<\/td><td>147<\/td><td>147<\/td><\/tr>\r\n                  <tr><td>78<\/td><td>144<\/td><td>144<\/td><\/tr>\r\n                  <tr><td>77<\/td><td>141<\/td><td>141<\/td><\/tr>\r\n                  <tr><td>76<\/td><td>139<\/td><td>139<\/td><\/tr>\r\n                  <tr><td>75<\/td><td>137<\/td><td>137<\/td><\/tr>\r\n                  <tr><td>74<\/td><td>135<\/td><td>135<\/td><\/tr>\r\n                  <tr><td>73<\/td><td>132<\/td><td>132<\/td><\/tr>\r\n                  <tr><td>72<\/td><td>130<\/td><td>130<\/td><\/tr>\r\n                  <tr><td>71<\/td><td>127<\/td><td>127<\/td><\/tr>\r\n                  <tr><td>70<\/td><td>125<\/td><td>125<\/td><\/tr>\r\n                  <tr><td>69<\/td><td>123<\/td><td>123<\/td><\/tr>\r\n                  <tr><td>68<\/td><td>121<\/td><td>121<\/td><\/tr>\r\n                  <tr><td>67<\/td><td>119<\/td><td>119<\/td><\/tr>\r\n                  <tr><td>66<\/td><td>117<\/td><td>117<\/td><\/tr>\r\n                  <tr><td>65<\/td><td>116<\/td><td>116<\/td><\/tr>\r\n                  <tr><td>64<\/td><td>114<\/td><td>114<\/td><\/tr>\r\n                  <tr><td>63<\/td><td>112<\/td><td>112<\/td><\/tr>\r\n                  <tr><td>62<\/td><td>110<\/td><td>110<\/td><\/tr>\r\n                  <tr><td>61<\/td><td>108<\/td><td>108<\/td><\/tr>\r\n                  <tr><td>60<\/td><td>107<\/td><td>107<\/td><\/tr>\r\n                  <tr><td>59<\/td><td>106<\/td><td>106<\/td><\/tr>\r\n                  <tr><td>58<\/td><td>104<\/td><td>104<\/td><\/tr>\r\n                  <tr><td>57<\/td><td>103<\/td><td>103<\/td><\/tr>\r\n                  <tr><td>56<\/td><td>101<\/td><td>101<\/td><\/tr>\r\n                  <tr><td>55<\/td><td>100<\/td><td>100<\/td><\/tr>\r\n        <\/tbody>\r\n      <\/table><\/div>\r\n      <p class=\"om-hc-note\">HRB reference range: 55\u2013100. Values beyond 100 HRB are not offered. Rockwell B and C values are not forcibly mapped across the two reference tables.<\/p>\r\n    <\/div>\r\n    <div class=\"om-hc-highlight\"><strong>Engineering note:<\/strong> These tables are intended only for approximate comparisons in homogeneous, non-austenitic carbon, alloy, and tool steels. Heat treatment, microstructure, and alloy composition can affect the relationship. Use material-specific standards for austenitic stainless steels, aluminum, copper alloys, and other metals.<\/div>\r\n  <\/div>\r\n\r\n  <div class=\"om-hc-section\">\r\n    <h3>How to Convert HRC, HRB, HB and HV<\/h3>\r\n    <p>Hardness scales use different indenters, test loads and measurement methods. For steel, relationships are established empirically rather than through a universal exact formula. Select a reading such as <strong>40 HRC<\/strong>, then convert using the Rockwell C reference range. The chart gives approximately <strong>392 HV<\/strong> and <strong>371 HB<\/strong>. For softer steel, <strong>90 HRB<\/strong> corresponds to about <strong>185 HV<\/strong> and <strong>185 HB<\/strong> in the separate Rockwell B table.<\/p>\r\n    <p>For a value between listed points, this calculator uses straight-line interpolation <strong>within the selected table only<\/strong>. It does not extrapolate beyond the available data or treat a value in the wrong hardness scale as valid.<\/p>\r\n  <\/div>\r\n\r\n  <div class=\"om-hc-cta-panel\">\r\n    <div><h3>Machining Hardened Steel?<\/h3><p>Hardness affects cutting tool selection, insert grade and machining parameters. Explore our CNC turning tools or contact OnMyToolings with your workpiece material and hardness.<\/p><\/div>\r\n    <div class=\"om-hc-cta-actions\"><a class=\"om-hc-cta om-hc-cta-secondary\" href=\"https:\/\/onmytoolings.com\/turning-tools\/\" target=\"_blank\">View Turning Tools<\/a><a class=\"om-hc-cta\" href=\"https:\/\/onmytoolings.com\/contact\/\" target=\"_blank\">Request a Quote<\/a><\/div>\r\n  <\/div>\r\n\r\n  <div class=\"om-hc-section\">\r\n    <h3>Frequently Asked Questions<\/h3>\r\n    <details><summary>Is hardness conversion exact?<\/summary><p>No. Hardness conversion is approximate because different hardness tests measure material behavior differently. Confirm specifications with a direct hardness test in the required scale.<\/p><\/details>\r\n    <details><summary>Can I convert HRC 60 to HB?<\/summary><p>In the hard-steel reference data, 60 HRC corresponds to approximately 654 HB and 697 HV. High-hardness Brinell equivalents are especially approximate and may not represent a practical Brinell measurement on the same part.<\/p><\/details>\r\n    <details><summary>Why is the HRC or HRB result sometimes N\/A?<\/summary><p>Rockwell B and C are used over different hardness ranges, and ASTM E140 gives them separate tables. The tool does not invent a Rockwell C reading for soft-steel Table B or a Rockwell B reading for hard-steel Table A.<\/p><\/details>\r\n    <details><summary>Can I use this chart for stainless steel, aluminum or titanium?<\/summary><p>Not as a universal chart. Austenitic stainless steels and non-ferrous alloys require material-specific conversion data. These tables are for non-austenitic steels.<\/p><\/details>\r\n    <details><summary>Can hardness reliably predict tensile strength?<\/summary><p>No universally accurate relationship applies across all steel grades and heat treatments. The former single-table tensile-strength estimates were intentionally removed rather than implying a standard ASTM E140 tensile conversion.<\/p><\/details>\r\n  <\/div>\r\n  <p class=\"om-hc-footnote\">References: <a href=\"https:\/\/store.astm.org\/e0140-26.html\" rel=\"noopener noreferrer\" target=\"_blank\">ASTM E140 (scope and limitations)<\/a>; <a href=\"https:\/\/www.omispec.com\/resources\/hardness-conversions\/\" rel=\"noopener noreferrer\" target=\"_blank\">OMI Rockwell B reference data (60\u2013100 HRB)<\/a>; <a href=\"https:\/\/aobosteel.com\/tool-steel-hardness-conversion-calculator\/\" rel=\"noopener noreferrer\" target=\"_blank\">AoboSteel supplementary values (55\u201359 HRB)<\/a>. Hard-steel HRC data are retained from the supplied original reference table, with invalid mixed-scale rows removed. Verify the applicable table and test conditions before specification use.<\/p>\r\n<\/section>\r\n<script>\r\n(function () {\r\n  'use strict';\r\n  function setupAllHardnessCalculators() {\r\n    document.querySelectorAll('[data-onmy-hardness-calculator]:not([data-om-hc-ready])').forEach(function (root) {\r\n      root.setAttribute('data-om-hc-ready', '1');\r\n      var form = root.querySelector('[data-om-hc-form]');\r\n      var inputs = Array.from(root.querySelectorAll('[data-om-hc-input]'));\r\n      var choice = root.querySelector('[data-om-hc-range]');\r\n      var status = root.querySelector('[data-om-hc-status]');\r\n      var results = root.querySelector('[data-om-hc-results]');\r\n      var sourceText = root.querySelector('[data-om-hc-source]');\r\n      var resultNote = root.querySelector('[data-om-hc-result-note]');\r\n\r\n      function parseCell(text) {\r\n        var n = Number(text.trim());\r\n        return text.trim() !== '\u2014' && text.trim() !== '' && Number.isFinite(n) ? n : null;\r\n      }\r\n      function readTable(key) {\r\n        return Array.from(root.querySelectorAll('[data-om-hc-table=\"' + key + '\"] tbody tr')).map(function (tr) {\r\n          var td = tr.querySelectorAll('td');\r\n          return key === 'c'\r\n            ? { hrc: parseCell(td[0].textContent), hv: parseCell(td[1].textContent), hb: parseCell(td[2].textContent), hrb: null }\r\n            : { hrb: parseCell(td[0].textContent), hv: parseCell(td[1].textContent), hb: parseCell(td[2].textContent), hrc: null };\r\n        });\r\n      }\r\n      var tables = { c: readTable('c'), b: readTable('b') };\r\n      function rangeFor(table, field) {\r\n        var vals = tables[table \u201c\u201d not found \/]<br \/>\n<br \/>\n.map(function (r) { return r[field]; }).filter(function (v) { return v !== null; });\r\n        return [Math.min.apply(null, vals), Math.max.apply(null, vals)];\r\n      }\r\n      function inRange(table, field, value) {\r\n        var bounds = rangeFor(table, field);\r\n        return value >= bounds[0] - 1e-9 && value <= bounds[1] + 1e-9;\r\n      }\r\n      function pickTable(field, value) {\r\n        var preference = choice.value;\r\n        if (field === 'hrc') {\r\n          if (preference === 'b') return {error:'Rockwell C values use the HRC table. Set Reference range to Auto or Harder steel.'};\r\n          return {key:'c'};\r\n        }\r\n        if (field === 'hrb') {\r\n          if (preference === 'c') return {error:'Rockwell B values use the HRB table. Set Reference range to Auto or Softer steel.'};\r\n          return {key:'b'};\r\n        }\r\n        if (preference !== 'auto') return {key:preference};\r\n        var fitsC = inRange('c', field, value);\r\n        var fitsB = inRange('b', field, value);\r\n        if (fitsC && fitsB) return {error:'This HV\/HB reading falls in the overlap of the hard- and soft-steel tables. Select HRC or HRB under Reference range, then calculate again.'};\r\n        if (fitsC) return {key:'c'};\r\n        if (fitsB) return {key:'b'};\r\n        return {error:'Out of the supported reference ranges. Choose a hardness value within the tables below; values outside them cannot be extrapolated.'};\r\n      }\r\n      function interpolate(rows, field, number) {\r\n        var ordered = rows.filter(function (r) { return r[field] !== null; }).slice().sort(function (a,b) { return a[field] - b[field]; });\r\n        if (!ordered.length || number < ordered[0][field] || number > ordered[ordered.length-1][field]) return null;\r\n        var exact = ordered.find(function (r) { return Math.abs(r[field] - number) < 1e-9; });\r\n        if (exact) return Object.assign({}, exact);\r\n        for (var i = 0; i < ordered.length - 1; i++) {\r\n          var lo = ordered[i], hi = ordered[i+1];\r\n          if (number > lo[field] && number < hi[field]) {\r\n            var ratio = (number - lo[field]) \/ (hi[field] - lo[field]);\r\n            var value = {};\r\n            ['hv','hb','hrc','hrb'].forEach(function (key) {\r\n              value[key] = lo[key] !== null && hi[key] !== null ? lo[key] + ratio * (hi[key] - lo[key]) : null;\r\n            });\r\n            return value;\r\n          }\r\n        }\r\n        return null;\r\n      }\r\n      function showStatus(message, state) {\r\n        status.textContent = message;\r\n        status.setAttribute('data-state', state || 'neutral');\r\n      }\r\n      function hideResults() { results.hidden = true; }\r\n      function formatResult(value, field) {\r\n        if (value === null || !Number.isFinite(value)) return 'N\/A';\r\n        \/\/ Reflect the approximate accuracy of tabulated values.\r\n        var rounded = Math.round((value + Number.EPSILON) * 10) \/ 10;\r\n        return Number.isInteger(rounded) ? String(rounded) : rounded.toFixed(1);\r\n      }\r\n      inputs.forEach(function (input) {\r\n        input.addEventListener('input', function () {\r\n          inputs.forEach(function (other) { if (other !== input) other.value = ''; });\r\n          hideResults();\r\n          showStatus('Ready to calculate from ' + input.getAttribute('data-om-hc-input').toUpperCase() + '.', 'neutral');\r\n        });\r\n      });\r\n      choice.addEventListener('change', function () {\r\n        hideResults();\r\n        showStatus('Reference range changed. Press Calculate to update the result.', 'neutral');\r\n      });\r\n      form.addEventListener('submit', function (event) {\r\n        event.preventDefault();\r\n        var active = inputs.filter(function (el) { return el.value.trim() !== ''; });\r\n        if (!active.length) { hideResults(); showStatus('Enter one hardness value before calculating.', 'error'); return; }\r\n        if (active.length !== 1) { hideResults(); showStatus('Enter a value in one field only. Clear the other fields and try again.', 'error'); return; }\r\n        var selected = active[0];\r\n        var field = selected.getAttribute('data-om-hc-input');\r\n        var raw = selected.value.trim();\r\n        var number = Number(raw);\r\n        if (!Number.isFinite(number) || number <= 0) { hideResults(); showStatus('Enter a valid positive hardness value.', 'error'); return; }\r\n        var selection = pickTable(field, number);\r\n        if (selection.error) { hideResults(); showStatus(selection.error, 'error'); return; }\r\n        var key = selection.key;\r\n        if (!inRange(key, field, number)) {\r\n          var bounds = rangeFor(key, field);\r\n          hideResults();\r\n          showStatus('Value outside the selected reference: ' + field.toUpperCase() + ' must be between ' + bounds[0] + ' and ' + bounds[1] + '. No extrapolation is performed.', 'error');\r\n          return;\r\n        }\r\n        var converted = interpolate(tables[key], field, number);\r\n        if (!converted) { hideResults(); showStatus('This value cannot be converted from the selected table.', 'error'); return; }\r\n        ['hv','hb','hrc','hrb'].forEach(function (scale) {\r\n          var output = root.querySelector('[data-om-hc-output=\"' + scale + '\"]');\r\n          var formatted = formatResult(converted[scale], scale);\r\n          output.textContent = formatted;\r\n          output.classList.toggle('om-hc-na', formatted === 'N\/A');\r\n        });\r\n        sourceText.textContent = 'Converted from ' + number + ' ' + field.toUpperCase() + ' \u00b7 ' + (key === 'c' ? 'Table A (Rockwell C range)' : 'Table B (Rockwell B range)');\r\n        resultNote.textContent = key === 'c'\r\n          ? 'Rockwell B is N\/A in the selected hard-steel reference. Brinell values at very high hardness are especially approximate.'\r\n          : 'Rockwell C is N\/A in the selected soft-steel reference. HRB is limited to the tabulated range.';\r\n        results.hidden = false;\r\n        showStatus('Approximate reference conversion calculated successfully.', 'success');\r\n      });\r\n      root.querySelector('[data-om-hc-clear]').addEventListener('click', function () {\r\n        inputs.forEach(function (el) { el.value = ''; });\r\n        choice.value = 'auto';\r\n        hideResults();\r\n        showStatus('Cleared. Enter a known hardness value to start.', 'neutral');\r\n      });\r\n    });\r\n  }\r\n  \/\/ Works on normal page loads and when Elementor re-renders an HTML widget.\r\n  if (document.readyState === 'loading') {\r\n    document.addEventListener('DOMContentLoaded', setupAllHardnessCalculators, {once:true});\r\n  } else { setupAllHardnessCalculators(); }\r\n})();\r\n<\/script>\r\n<script type=\"module\" src=\"https:\/\/static.cloudflareinsights.com\/beacon.min.js\/vce701823e78c4301a35b7e07294d87301792088814092\" integrity=\"sha512-UKNk8GbxkABxKcXYuLkO16EleLGUkcvJWtpSNmExE0Too3ZaFAxTscNWEc1OdAv5\/BikHawapSCaiD2XCmp+Bw==\" data-cf-beacon='{\"version\":\"2024.11.0\",\"token\":\"7939e04a4baf43c8b86a560f74aac60e\",\"spa\":2}' crossorigin=\"anonymous\"><\/script>\r\n\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<div class=\"elementor-element elementor-element-858af12 e-flex e-con-boxed e-con e-parent\" data-id=\"858af12\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-59e8c75 elementor-position-inline-start elementor-view-default elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"59e8c75\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<a href=\"https:\/\/onmytoolings.com\/wp-content\/uploads\/2025\/11\/Hardness-Conversion-Table.pdf\" class=\"elementor-icon\" tabindex=\"-1\" target=\"_blank\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-file-pdf\" viewBox=\"0 0 384 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M369.9 97.9L286 14C277 5 264.8-.1 252.1-.1H48C21.5 0 0 21.5 0 48v416c0 26.5 21.5 48 48 48h288c26.5 0 48-21.5 48-48V131.9c0-12.7-5.1-25-14.1-34zM332.1 128H256V51.9l76.1 76.1zM48 464V48h160v104c0 13.3 10.7 24 24 24h104v288H48zm250.2-143.7c-12.2-12-47-8.7-64.4-6.5-17.2-10.5-28.7-25-36.8-46.3 3.9-16.1 10.1-40.6 5.4-56-4.2-26.2-37.8-23.6-42.6-5.9-4.4 16.1-.4 38.5 7 67.1-10 23.9-24.9 56-35.4 74.4-20 10.3-47 26.2-51 46.2-3.3 15.8 26 55.2 76.1-31.2 22.4-7.4 46.8-16.5 68.4-20.1 18.9 10.2 41 17 55.8 17 25.5 0 28-28.2 17.5-38.7zm-198.1 77.8c5.1-13.7 24.5-29.5 30.4-35-19 30.3-30.4 35.7-30.4 35zm81.6-190.6c7.4 0 6.7 32.1 1.8 40.8-4.4-13.9-4.3-40.8-1.8-40.8zm-24.4 136.6c9.7-16.9 18-37 24.7-54.7 8.3 15.1 18.9 27.2 30.1 35.5-20.8 4.3-38.9 13.1-54.8 19.2zm131.6-5s-5 6-37.3-7.8c35.1-2.6 40.9 5.4 37.3 7.8z\"><\/path><\/svg>\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"elementor-icon-box-description\">\n\t\t\t\t\t\tDownload Hardness Conversion Table PDF File here.\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\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\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>FREE METALWORKING TOOL Steel Hardness Conversion Calculator &amp; Tables Convert Vickers (HV), Brinell (HBW\/HBS), Rockwell C (HRC), and Rockwell B (HRB) values for non-austenitic steels using separate hard- and soft-steel reference data. Hardness Conversion Calculator Enter a hardness value into one field. The other three fields will clear automatically if you change the input scale. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":15030,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"full-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":"","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-16787","page","type-page","status-publish","hentry"],"acf":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Jiang.xu","author_link":"https:\/\/onmytoolings.com\/de\/author\/bigsunjianggmail-com\/"},"uagb_comment_info":0,"uagb_excerpt":"FREE METALWORKING TOOL Steel Hardness Conversion Calculator &amp; Tables Convert Vickers (HV), Brinell (HBW\/HBS), Rockwell C (HRC), and Rockwell B (HRB) values for non-austenitic steels using separate hard- and soft-steel reference data. Hardness Conversion Calculator Enter a hardness value into one field. The other three fields will clear automatically if you change the input scale.&hellip;","_links":{"self":[{"href":"https:\/\/onmytoolings.com\/de\/wp-json\/wp\/v2\/pages\/16787","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onmytoolings.com\/de\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/onmytoolings.com\/de\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/onmytoolings.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/onmytoolings.com\/de\/wp-json\/wp\/v2\/comments?post=16787"}],"version-history":[{"count":19,"href":"https:\/\/onmytoolings.com\/de\/wp-json\/wp\/v2\/pages\/16787\/revisions"}],"predecessor-version":[{"id":20042,"href":"https:\/\/onmytoolings.com\/de\/wp-json\/wp\/v2\/pages\/16787\/revisions\/20042"}],"up":[{"embeddable":true,"href":"https:\/\/onmytoolings.com\/de\/wp-json\/wp\/v2\/pages\/15030"}],"wp:attachment":[{"href":"https:\/\/onmytoolings.com\/de\/wp-json\/wp\/v2\/media?parent=16787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}