{"id":12304,"date":"2026-01-19T20:32:42","date_gmt":"2026-01-19T12:32:42","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=12304"},"modified":"2026-09-18T17:54:32","modified_gmt":"2026-09-18T09:54:32","slug":"tool-steel-hardness-conversion-calculator","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/tool-steel-hardness-conversion-calculator\/","title":{"rendered":"Calculadora de convers\u00e3o de dureza de a\u00e7o ferramenta (HRC, HV, HBW, HRB)"},"content":{"rendered":"\n\n\n\n\n\nTool Steel Hardness Conversion Calculator | HRC HRB HV HBW HBS<\/title>\n<meta name=\"description\" content=\"Convert between Rockwell C (HRC), Rockwell B (HRB), Vickers (HV), Brinell (HBW\/HBS) hardness scales for tool steel. 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!important;color: var(--ds-muted) !important}.entry-content[class] .chip{font-family: var(--ds-font-head) !important;font-size: 13px !important;font-weight: 700 !important}.entry-content[class] .kicker,.entry-content[class] .eyebrow,.entry-content[class] .aobo-eyebrow{display: inline-flex !important;align-items: center;gap: 7px;margin: 0 0 14px !important;padding: 6px 14px !important;border: 1px solid var(--ds-border) !important;border-radius: 999px !important;background: #ffffff !important;color: var(--ds-blue) !important;font-family: var(--ds-font-head) !important;font-size: 13px !important;font-weight: 700 !important;letter-spacing: 0 !important;text-transform: none !important}@media (max-width: 760px){.entry-content[class] h1{font-size: clamp(22px,6.4vw,min(34px,var(--h1-max,34px))) !important}.entry-content[class] h2{font-size: 25px !important}.entry-content[class] h3{font-size: 20px !important}.entry-content[class] h4{font-size: 17px !important}.entry-content[class] p,.entry-content[class] li{font-size: 16px !important}.entry-content[class] table th,.entry-content[class] table td{font-size: 14px !important;padding: 11px 12px !important}.entry-content[class] .aobo-hero{padding: 30px 22px}.entry-content[class] .aobo-final-cta{padding: 26px 22px}.entry-content[class] .aobo-final-cta .aobo-btn{width: 100%}}\n<\/style>\n<\/head>\n<body>\n<section class=\"aobo-ht-ref\" id=\"aoboHtRef\">\n <div class=\"aobo-wrap\">\n <div class=\"aobo-hero\">\n <div class=\"aobo-hero-top\">\n <div class=\"aobo-kicker\"><span><\/span>Aobo Steel Technical Tool<\/div>\n <h1 style=\"--h1-max:44px\">Tool Steel Hardness Conversion Calculator<\/h1>\n <p>Enter any hardness value and the calculator returns the nearest equivalents across the Rockwell C, Rockwell B, Vickers, and Brinell scales. It is built for the readings that do not have a ready answer, such as turning a single Vickers number from a test report into HRC, or checking a Brinell supply limit against a drawing called out in Rockwell. The conversion data follow ASTM E140 for non-austenitic steels. As a quick reference point, 60 HRC is close to 697 HV and about 654 HBW.<\/p>\n <\/div>\n\n <div class=\"aobo-tool-area\">\n <div class=\"aobo-calc-grid\">\n <div class=\"aobo-calc-card\">\n <h2>Hardened Tool Steel \/ HRC Range<\/h2>\n <p class=\"aobo-calc-desc\">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.<\/p>\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-calc-btn aobo-calc-primary\" type=\"button\" id=\"hard-calculate\">Calculate<\/button>\n <button class=\"aobo-calc-btn aobo-calc-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\">\n <h2>Annealed or Soft Steel \/ HRB Range<\/h2>\n <p class=\"aobo-calc-desc\">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.<\/p>\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-calc-btn aobo-calc-primary\" type=\"button\" id=\"soft-calculate\">Calculate<\/button>\n <button class=\"aobo-calc-btn aobo-calc-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>HRC Hardness Conversion Table — Hardened Tool Steel<\/h2>\n <p>Full conversion chart for Rockwell C (HRC) to Vickers (HV), Brinell steel ball (HBS), and Brinell tungsten carbide ball (HBW) for hardened and tempered tool steel. Data based on ASTM E140 for non-austenitic steels.<\/p>\n <div class=\"aobo-table-scroll\">\n <table class=\"aobo-ht-table\">\n <thead><tr><th>HRC<\/th><th>HV<\/th><th>HBS<\/th><th>HBW<\/th><\/tr><\/thead>\n <tbody>\n <tr><td class=\"aobo-grade-cell\">68<\/td><td>940<\/td><td>—<\/td><td>—<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">67<\/td><td>900<\/td><td>—<\/td><td>—<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">66<\/td><td>865<\/td><td>—<\/td><td>—<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">65<\/td><td>832<\/td><td>—<\/td><td>739<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">64<\/td><td>800<\/td><td>—<\/td><td>722<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">63<\/td><td>772<\/td><td>—<\/td><td>705<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">62<\/td><td>746<\/td><td>—<\/td><td>688<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">61<\/td><td>720<\/td><td>—<\/td><td>670<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">60<\/td><td>697<\/td><td>—<\/td><td>654<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">59<\/td><td>674<\/td><td>—<\/td><td>634<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">58<\/td><td>653<\/td><td>—<\/td><td>615<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">57<\/td><td>633<\/td><td>—<\/td><td>595<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">56<\/td><td>613<\/td><td>—<\/td><td>577<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">55<\/td><td>595<\/td><td>—<\/td><td>560<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">54<\/td><td>577<\/td><td>—<\/td><td>543<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">53<\/td><td>560<\/td><td>—<\/td><td>525<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">52<\/td><td>544<\/td><td>500<\/td><td>512<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">51<\/td><td>528<\/td><td>487<\/td><td>496<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">50<\/td><td>513<\/td><td>475<\/td><td>481<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">49<\/td><td>498<\/td><td>464<\/td><td>469<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">48<\/td><td>484<\/td><td>451<\/td><td>455<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">47<\/td><td>471<\/td><td>442<\/td><td>443<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">46<\/td><td>458<\/td><td>432<\/td><td>432<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">45<\/td><td>446<\/td><td>421<\/td><td>421<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">44<\/td><td>434<\/td><td>409<\/td><td>409<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">43<\/td><td>423<\/td><td>400<\/td><td>400<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">42<\/td><td>412<\/td><td>390<\/td><td>390<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">41<\/td><td>402<\/td><td>381<\/td><td>381<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">40<\/td><td>392<\/td><td>371<\/td><td>371<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">39<\/td><td>382<\/td><td>362<\/td><td>362<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">38<\/td><td>372<\/td><td>353<\/td><td>353<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">37<\/td><td>363<\/td><td>344<\/td><td>344<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">36<\/td><td>354<\/td><td>336<\/td><td>336<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">35<\/td><td>345<\/td><td>327<\/td><td>327<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">34<\/td><td>336<\/td><td>319<\/td><td>319<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">33<\/td><td>327<\/td><td>311<\/td><td>311<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">32<\/td><td>318<\/td><td>301<\/td><td>301<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">31<\/td><td>310<\/td><td>294<\/td><td>294<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">30<\/td><td>302<\/td><td>286<\/td><td>286<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">29<\/td><td>294<\/td><td>279<\/td><td>279<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">28<\/td><td>286<\/td><td>271<\/td><td>271<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">27<\/td><td>279<\/td><td>264<\/td><td>264<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">26<\/td><td>272<\/td><td>258<\/td><td>258<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">25<\/td><td>266<\/td><td>253<\/td><td>253<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">24<\/td><td>260<\/td><td>247<\/td><td>247<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">23<\/td><td>254<\/td><td>243<\/td><td>243<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">22<\/td><td>248<\/td><td>237<\/td><td>237<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">21<\/td><td>243<\/td><td>231<\/td><td>231<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">20<\/td><td>238<\/td><td>226<\/td><td>226<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n <\/div>\n\n <div class=\"aobo-section\">\n <h2>HRB Hardness Conversion Table — Annealed or Soft Steel<\/h2>\n <p>Full conversion chart for Rockwell B (HRB) to Vickers (HV) and Brinell (HBS) for annealed, normalized, or soft steel. Data based on ASTM E140 for non-austenitic steels.<\/p>\n <div class=\"aobo-table-scroll\">\n <table class=\"aobo-ht-table\">\n <thead><tr><th>HRB<\/th><th>HV<\/th><th>HBS<\/th><\/tr><\/thead>\n <tbody>\n <tr><td class=\"aobo-grade-cell\">100<\/td><td>240<\/td><td>240<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">99<\/td><td>234<\/td><td>234<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">98<\/td><td>228<\/td><td>228<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">97<\/td><td>222<\/td><td>222<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">96<\/td><td>216<\/td><td>216<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">95<\/td><td>210<\/td><td>210<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">94<\/td><td>205<\/td><td>205<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">93<\/td><td>200<\/td><td>200<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">92<\/td><td>195<\/td><td>195<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">91<\/td><td>190<\/td><td>190<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">90<\/td><td>185<\/td><td>185<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">89<\/td><td>180<\/td><td>180<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">88<\/td><td>176<\/td><td>176<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">87<\/td><td>172<\/td><td>172<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">86<\/td><td>169<\/td><td>169<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">85<\/td><td>165<\/td><td>165<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">84<\/td><td>162<\/td><td>162<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">83<\/td><td>159<\/td><td>159<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">82<\/td><td>156<\/td><td>156<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">81<\/td><td>153<\/td><td>153<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">80<\/td><td>150<\/td><td>150<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">79<\/td><td>147<\/td><td>147<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">78<\/td><td>144<\/td><td>144<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">77<\/td><td>141<\/td><td>141<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">76<\/td><td>139<\/td><td>139<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">75<\/td><td>137<\/td><td>137<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">74<\/td><td>135<\/td><td>135<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">73<\/td><td>132<\/td><td>132<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">72<\/td><td>130<\/td><td>130<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">71<\/td><td>127<\/td><td>127<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">70<\/td><td>125<\/td><td>125<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">69<\/td><td>123<\/td><td>123<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">68<\/td><td>121<\/td><td>121<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">67<\/td><td>119<\/td><td>119<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">66<\/td><td>117<\/td><td>117<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">65<\/td><td>116<\/td><td>116<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">64<\/td><td>114<\/td><td>114<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">63<\/td><td>112<\/td><td>112<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">62<\/td><td>110<\/td><td>110<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">61<\/td><td>108<\/td><td>108<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">60<\/td><td>107<\/td><td>107<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">59<\/td><td>106<\/td><td>106<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">58<\/td><td>104<\/td><td>104<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">57<\/td><td>103<\/td><td>103<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">56<\/td><td>101<\/td><td>101<\/td><\/tr>\n <tr><td class=\"aobo-grade-cell\">55<\/td><td>100<\/td><td>100<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n <\/div>\n\n <div class=\"aobo-section\">\n <h2>Hardness Conversions This Calculator Covers<\/h2>\n <p>The calculator works in both directions across five scales: Rockwell C (HRC), Rockwell B (HRB), Vickers (HV), and Brinell measured with either a tungsten carbide ball (HBW) or a steel ball (HBS). You enter the value you already have, and it returns the nearest listed equivalent on each of the other scales, so you do not need to read across a printed chart by eye.<\/p>\n <p>The conversions people run here most often are the ones a single chart row cannot answer on its own. Converting Brinell to Rockwell C matters when an annealed supply limit is given in HBW but the drawing specifies HRC. Converting Vickers to Rockwell C is common when a surface or microhardness reading is reported in HV and you need the equivalent working HRC. HBW to HRC and HRB to HRC come up when a mill certificate lists one scale while your own specification uses another. Each of these is a single entry in the calculator above rather than a manual lookup.<\/p>\n <p>Because soft and hardened steel are measured by different methods, the tool keeps two separate ranges. The HRC range covers hardened and tempered tool steel, and the HRB range covers annealed or normalized steel. This split prevents a low soft reading from being matched into the hardened range by mistake. As a worked example in the soft range, 95 HRB is close to 210 HV.<\/p>\n <\/div>\n\n <div class=\"aobo-section\">\n <h2>Which Range Should You Use?<\/h2>\n <p>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.<\/p>\n\n <div class=\"aobo-info-grid\">\n <div class=\"aobo-info-card\">\n <strong>HRC for hardened tool steel<\/strong>\n <span>HRC is the common working hardness scale for hardened tool steel, such as <a href=\"https:\/\/aobosteel.com\/d2-tool-steel\/\">D2 at 58-60 HRC<\/a>, <a href=\"https:\/\/aobosteel.com\/h13-tool-steel\/\">H13 at 44-52 HRC<\/a>, or <a href=\"https:\/\/aobosteel.com\/m2-tool-steel-hardness\/\">high-speed steel above 60 HRC<\/a>.<\/span>\n <\/div>\n <div class=\"aobo-info-card\">\n <strong>HB and HRB for soft supply<\/strong>\n <span>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.<\/span>\n <\/div>\n <div class=\"aobo-info-card\">\n <strong>HV for technical comparison<\/strong>\n <span>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.<\/span>\n <\/div>\n <\/div>\n <\/div>\n\n <div class=\"aobo-section\">\n <h2>Data Source and Use Limit<\/h2>\n <p>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.<\/p>\n\n <div class=\"aobo-source-box\">\n <h3>Why the values are approximate<\/h3>\n <p>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.<\/p>\n <p>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.<\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n\n <div class=\"aobo-cta\">\n <div>\n <h3>Need Tool Steel Supplied in Annealed Condition?<\/h3>\n <p>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. Size range, tolerances, minimum order and lead times are set out on our <a href=\"https:\/\/aobosteel.com\/tool-steel-supplier-bulk-capability\/\">tool steel supply capability page<\/a>.<\/p>\n <\/div>\n <div class=\"aobo-cta-actions\">\n <a class=\"aobo-btn aobo-btn-primary popmake-16052\" href=\"javascript:void(0);\">Open Contact Form<\/a>\n <a class=\"aobo-btn aobo-btn-whatsapp\" href=\"https:\/\/wa.me\/8618062945370\" target=\"_blank\" rel=\"noopener\">Chat on WhatsApp<\/a>\n <\/div>\n <\/div>\n\n <p class=\"aobo-source\">Data source: ASTM E140 hardness conversion tables for non-austenitic steels. Data compiled from public references and industry standards.<\/p>\n <\/div>\n<\/section>\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 input.classList.remove(\"aobo-active-input\");\n input.classList.remove(\"aobo-invalid-input\");\n input.classList.remove(\"aobo-not-listed\");\n }\n\n function resetPlaceholders(group) {\n var inputs = getInputs(group);\n\n for (var i = 0; i < inputs.length; i++) {\n var id = inputs[i].id;\n inputs[i].placeholder = defaultPlaceholders[id] || \"\";\n inputs[i].classList.remove(\"aobo-not-listed\");\n }\n }\n\n function showValueOrNotListed(inputId, value) {\n var input = document.getElementById(inputId);\n\n input.value = \"\";\n input.classList.remove(\"aobo-not-listed\");\n\n if (value === null || value === undefined || value === \"\") {\n input.placeholder = notListedText;\n input.classList.add(\"aobo-not-listed\");\n return;\n }\n\n input.value = String(value);\n input.placeholder = defaultPlaceholders[inputId] || \"\";\n }\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(\"#aoboHtRef 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<\/body>\n<\/html>\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Tool Steel Hardness Conversion Calculator | HRC HRB HV HBW HBS Aobo Steel Technical Tool Tool Steel Hardness Conversion Calculator Enter any hardness value and the calculator returns the nearest equivalents across the Rockwell C, Rockwell B, Vickers, and Brinell scales. 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