{"id":4792,"date":"2025-06-17T02:08:01","date_gmt":"2025-06-17T02:08:01","guid":{"rendered":"https:\/\/machining-quote.com\/?p=4792"},"modified":"2026-03-17T09:29:16","modified_gmt":"2026-03-17T01:29:16","slug":"laser-cutting-metal-guide","status":"publish","type":"post","link":"https:\/\/machining-quote.com\/el\/bolg\/laser-cutting-metal-guide\/","title":{"rendered":"Laser Cutting Metal: A Complete Guide"},"content":{"rendered":"<p>Laser cutting slices carbon steel, stainless, and aluminum with light focused sharper than a knife edge. Because the beam never dulls, edges stay crisp from the first part to the 10,000-th. This guide shows you, step by step, how to pick machines, set parameters, and check quality so your metal parts exit the bed on-size and burr-free.<\/p>\n\n<h4>\u03a0\u03af\u03bd\u03b1\u03ba\u03b1\u03c2 \u03c0\u03b5\u03c1\u03b9\u03b5\u03c7\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd<\/h4>\n<ul>\n  <li><a href=\"#how-laser-cutting-works-on-metal\">How laser cutting works on metal<\/a><\/li>\n  <li><a href=\"#select-the-right-laser-type\">Select the right laser type for your job<\/a><\/li>\n  <li><a href=\"#know-material-and-thickness-limits\">Know material and thickness limits<\/a><\/li>\n  <li><a href=\"#compare-assist-gases-and-edge-quality\">Compare assist gases and edge quality<\/a><\/li>\n  <li><a href=\"#balance-cutting-speed-power-cost\">Balance cutting speed, power, and cost<\/a><\/li>\n  <li><a href=\"#design-guidelines-for-laser-cut-metal\">Design guidelines for laser-cut metal parts<\/a><\/li>\n  <li><a href=\"#prevent-common-laser-cutting-defects\">Prevent common laser-cutting defects<\/a><\/li>\n  <li><a href=\"#measure-accuracy-and-surface-finish\">Measure accuracy and surface finish<\/a><\/li>\n  <li><a href=\"#safety-and-maintenance-tips-for-lasers\">Safety and maintenance tips for lasers<\/a><\/li>\n  <li><a href=\"#budget-and-lead-time-considerations\">Budget and lead-time considerations<\/a><\/li>\n  <li><a href=\"#cta-integrated-metal-services\">Need bending &#038; machining services?<\/a><\/li>\n  <li><a href=\"#summary-checklist-laser-cutting\">Summary checklist for successful metal laser cutting<\/a><\/li>\n<\/ul>\n\n<hr>\n\n<h2 id=\"how-laser-cutting-works-on-metal\">How Laser Cutting Works On Metal<\/h2>\n<p>A power source excites a laser medium\u2014CO<sub>2<\/sub> gas, fiber-pumped Yb, or disk. Mirrors or fiber deliver the beam to a lens that focuses energy into a 100-\u00b5m spot. Assist gas blows molten metal away, leaving a kerf only 10\u201320 % wider than the beam. Motion controllers trace DXF or STEP outlines with \u00b10.05 mm repeatability.<\/p>\n\n<h2 id=\"select-the-right-laser-type\">Select The Right Laser Type For Your Job<\/h2>\n<p>The choice of machine changes edge color, speed, and cost. Compare options below before booking shop time.<\/p>\n\n<table border=\"1\">\n  <thead>\n    <tr>\n      <th>Laser type<\/th>\n      <th>Wavelength \u00b5m<\/th>\n      <th>Best metals<\/th>\n      <th>Max thickness (mild steel)<\/th>\n      <th>Capital cost index*<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>CO<sub>2<\/sub> (DC)<\/td>\n      <td>10.6<\/td>\n      <td>Steel, stainless<\/td>\n      <td>20 mm<\/td>\n      <td>1.0<\/td>\n    <\/tr>\n    <tr>\n      <td>Fiber 3 kW<\/td>\n      <td>1.06<\/td>\n      <td>Steel, Al, Cu<br>reflective alloys<\/td>\n      <td>25 mm<\/td>\n      <td>1.3<\/td>\n    <\/tr>\n    <tr>\n      <td>Fiber 6 kW+<\/td>\n      <td>1.06<\/td>\n      <td>Thick steel, stainless<\/td>\n      <td>40 mm<\/td>\n      <td>1.6<\/td>\n    <\/tr>\n    <tr>\n      <td>Disk 4 kW<\/td>\n      <td>1.03<\/td>\n      <td>High-mirror Al<br>precise edges<\/td>\n      <td>25 mm<\/td>\n      <td>1.4<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n<p>*1.0 \u2248 baseline cost of a 4 kW CO<sub>2<\/sub> system.<\/p>\n\n<h2 id=\"know-material-and-thickness-limits\">Know Material And Thickness Limits<\/h2>\n<p>Every metal absorbs laser energy differently. The plot shows typical maximum cut thickness at 4 kW fiber.<\/p>\n\n<pre>\nMild steel      \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588 25 mm\nStainless 304   \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588    20 mm\nAluminum 5052   \u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588       12 mm\nBrass C260      \u2588\u2588\u2588\u2588\u2588\u2588          6 mm\nCopper C110     \u2588\u2588\u2588\u2588\u2588           4 mm\nTitanium 6-4    \u2588\u2588\u2588\u2588\u2588\u2588\u2588         8 mm\n<\/pre>\n\n<p>Above these limits, kerf widens and dross builds. For thicker plates switch to plasma or oxy-fuel.<\/p>\n\n<h2 id=\"compare-assist-gases-and-edge-quality\">Compare Assist Gases And Edge Quality<\/h2>\n<p>Assist gas clears the kerf and influences oxidation. Choose with the following guide.<\/p>\n\n<table border=\"1\">\n  <thead>\n    <tr>\n      <th>Gas<\/th>\n      <th>Pressure bar<\/th>\n      <th>Edge color<\/th>\n      <th>Best on<\/th>\n      <th>Cost index*<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u039f<sub>2<\/sub><\/td>\n      <td>0.8\u20131.5<\/td>\n      <td>Dark, oxidized<\/td>\n      <td>Steel \u2264 12 mm fast cut<\/td>\n      <td>1.0<\/td>\n    <\/tr>\n    <tr>\n      <td>N<sub>2<\/sub><\/td>\n      <td>8\u201318<\/td>\n      <td>Bright, paint-ready<\/td>\n      <td>Stainless, Al<\/td>\n      <td>1.8<\/td>\n    <\/tr>\n    <tr>\n      <td>Compressed air<\/td>\n      <td>6\u201310<\/td>\n      <td>Light oxide<\/td>\n      <td>Thin steel \u2264 3 mm budget work<\/td>\n      <td>0.2<\/td>\n    <\/tr>\n    <tr>\n      <td>Ar<\/td>\n      <td>6\u201312<\/td>\n      <td>Oxide-free<\/td>\n      <td>Titanium, aerospace<\/td>\n      <td>3.5<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n<p>*Cost index relative to oxygen at same flow.<\/p>\n\n<h2 id=\"balance-cutting-speed-power-cost\">Balance Cutting Speed, Power, And Cost<\/h2>\n<p>More watts cut faster, but electricity and optics cost more. Use this reference chart for 4 kW vs 6 kW fiber on mild steel with nitrogen assist.<\/p>\n\n<pre>\nThickness mm | Speed 4 kW (m\/min) | Speed 6 kW (m\/min)\n------------------------------------------------------\n1.0          | 45                | 62\n3.0          | 12                | 20\n6.0          |  4.5              |  8\n10.0         |  1.5              |  3\n<\/pre>\n\n<p>Doubling power rarely halves cycle time on thin gauges due to machine acceleration limits. For sheet \u2264 3 mm, table swap speed often dominates ROI.<\/p>\n\n<h2 id=\"design-guidelines-for-laser-cut-metal\">Design Guidelines For Laser-Cut Metal Parts<\/h2>\n<ul>\n  <li>Minimum slot width \u2265 kerf \u00d7 1.2 (\u2248 0.2 mm for fiber).<\/li>\n  <li>Hole diameter \u2265 thickness for clean roundness.<\/li>\n  <li>Keep inner corner radius \u2265 kerf to reduce dwell burn.<\/li>\n  <li>Tabs for nests: 0.2 mm width keeps parts attached during shakeout.<\/li>\n  <li>Leave 3 mm sheet margin to clamp fingers\u2014avoids edge flare.<\/li>\n<\/ul>\n\n<h2 id=\"prevent-common-laser-cutting-defects\">Prevent Common Laser-Cutting Defects<\/h2>\n\n<table border=\"1\">\n  <thead>\n    <tr>\n      <th>Defect<\/th>\n      <th>Symptom<\/th>\n      <th>Main cause<\/th>\n      <th>Fast fix<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>Dross<\/td>\n      <td>Beads under edge<\/td>\n      <td>Low gas pressure<\/td>\n      <td>+2 bar N<sub>2<\/sub><\/td>\n    <\/tr>\n    <tr>\n      <td>Striations<\/td>\n      <td>Wavy lines<\/td>\n      <td>Focus off<\/td>\n      <td>Auto-focus \u20130.5 mm<\/td>\n    <\/tr>\n    <tr>\n      <td>Burn marks<\/td>\n      <td>Brown halo<\/td>\n      <td>Dirty lens<\/td>\n      <td>Swap protective glass<\/td>\n    <\/tr>\n    <tr>\n      <td>Edge taper<\/td>\n      <td>Top wider than bottom<\/td>\n      <td>Power too low, speed too high<\/td>\n      <td>-10 % speed<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h2 id=\"measure-accuracy-and-surface-finish\">Measure Accuracy And Surface Finish<\/h2>\n<p>Use simple tools to confirm cut quality:<\/p>\n<ul>\n  <li><strong>Digital caliper<\/strong>\u2014Hole \u00d8 tolerance \u00b10.05 mm in 3 mm steel.<\/li>\n  <li><strong>Square gauge<\/strong>\u2014Edge perpendicularity \u2264 0.3 mm per 25 mm thickness.<\/li>\n  <li><strong>Surface roughness tester<\/strong>\u2014Ra 3\u20136 \u00b5m typical for nitrogen cut stainless.<\/li>\n<\/ul>\n\n<h2 id=\"safety-and-maintenance-tips-for-lasers\">Safety And Maintenance Tips For Lasers<\/h2>\n<p>A Class 4 laser can blind in milliseconds. Always:<\/p>\n<ul>\n  <li>Enclose cutting area; interlock doors to stop beam.<\/li>\n  <li>Wear OD 6+ goggles when viewing open applications.<\/li>\n  <li>Replace nozzle every 1 000 pierces to keep beam centric.<\/li>\n  <li>Clean lens daily; 5 \u00b5m spatter spot can cost 5 % power.<\/li>\n<\/ul>\n\n<h2 id=\"budget-and-lead-time-considerations\">Budget And Lead-Time Considerations<\/h2>\n<p>Laser machines save time on setup; cutting cost scales mostly with runtime and gas.<\/p>\n\n<pre>\nGauge mm | Parts\/hour (1 m2 nests) | Cost $\/part* | Lead-time days\n1\u20132      | 140                    | 0.35         | 2\n3\u20134      | 75                     | 0.80         | 3\n5\u20138      | 28                     | 2.30         | 4\n>10      | 12                     | 4.20         | 5\n<\/pre>\n<p>*Medium complexity, nitrogen assist, excludes material.<\/p>\n\n<h2 id=\"cta-integrated-metal-services\">Need Bending &#038; Machining Services?<\/h2>\n<p>We cut steel, stainless, and <a href=\"https:\/\/www.tuofa-cncmachining.com\/tuofa-blog\/how-to-cut-aluminum.html\" target=\"_blank\" rel=\"nofollow noopener\">\u03b1\u03bb\u03bf\u03c5\u03bc\u03af\u03bd\u03b9\u03bf<\/a> on 3\u201312 kW fiber lasers, then bend, tap, and machine in-house for one-stop delivery. Upload your STEP file for a rapid quote.<\/p>\n\n<h2 id=\"summary-checklist-laser-cutting\">Summary Checklist For Successful Metal Laser Cutting<\/h2>\n<ol>\n  <li>Select laser type\u2014fiber beats CO<sub>2<\/sub> for Al and Cu.<\/li>\n  <li>Confirm assist gas\u2014oxygen for speed, nitrogen for paint-ready edges.<\/li>\n  <li>Use min slot \u2265 0.2 mm and hole \u00d8 \u2265 thickness.<\/li>\n  <li>Start with power, speed, and gas from target thickness chart; tweak for dross-free edge.<\/li>\n  <li>Inspect the first article\u2014measure kerf, verify bend sequence, and log program revision.<\/li>\n<\/ol>\n\n<p>With these rules you will cut clean profiles, avoid costly rework, and ship orders on time, every time.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Laser cutting slices carbon steel, stainless, and aluminum with light focused sharper than a knife edge. Because the beam never dulls, edges stay crisp from the first part to the 10,000-th. This guide shows you, step by step, how to pick machines, set parameters, and check quality so your metal parts exit the bed on-size [&hellip;]<\/p>","protected":false},"author":5,"featured_media":4793,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","content-type":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-4792","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sheet-metal-fabrication-guide"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/posts\/4792","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/comments?post=4792"}],"version-history":[{"count":2,"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/posts\/4792\/revisions"}],"predecessor-version":[{"id":4932,"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/posts\/4792\/revisions\/4932"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/media\/4793"}],"wp:attachment":[{"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/media?parent=4792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/categories?post=4792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/machining-quote.com\/el\/wp-json\/wp\/v2\/tags?post=4792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}