{"id":100310,"date":"2026-02-15T20:22:21","date_gmt":"2026-02-15T20:22:21","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100310"},"modified":"2026-04-05T15:38:25","modified_gmt":"2026-04-05T15:38:25","slug":"weld-strength-calculator","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/nb\/calculators\/weld-strength-calculator\/","title":{"rendered":"Sveisestyrkekalkulator \u2014 Kil- og stumpsveis | Vibromera"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Weld Strength Calculator\",\"description\":\"Free online calculator for fillet and butt weld strength per EN 1993 \/ AWS D1.1.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/weld-strength-calculator\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2025-01-01\",\"dateModified\":\"2026-02-15\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"How is fillet weld strength calculated?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Fillet weld capacity = throat area \u00d7 allowable shear stress = a \u00d7 L \u00d7 (fu \/ (\u221a3 \u00d7 \u03b2w \u00d7 \u03b3M2)), where a is throat thickness, L is effective length, fu is ultimate tensile strength, \u03b2w is correlation factor, and \u03b3M2 is safety factor (typically 1.25).\"}},\n{\"@type\":\"Question\",\"name\":\"What is the throat thickness of a fillet weld?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Throat thickness (a) is the shortest distance from the root to the face of the weld. For an equal-leg fillet with leg size s: a = s \u00d7 cos(45\u00b0) = 0.707 \u00d7 s. For example, a 6mm fillet weld has throat thickness \u2248 4.24 mm.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the difference between fillet and butt welds?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Fillet welds join two surfaces at right angles (T-joints, lap joints) and carry load in shear through the throat. Butt welds join two plates end-to-end with full or partial penetration and carry load in direct tension\/compression through the weld thickness.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the correlation factor \u03b2w?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The correlation factor \u03b2w accounts for the material grade. Per EN 1993-1-8: S235 \u2192 \u03b2w = 0.8, S275 \u2192 \u03b2w = 0.85, S355 \u2192 \u03b2w = 0.9, S420 \u2192 \u03b2w = 1.0, S460 \u2192 \u03b2w = 1.0.\"}},\n{\"@type\":\"Question\",\"name\":\"How do I calculate weld stress from an applied force?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Weld stress \u03c3 = F \/ (a \u00d7 L_eff), where F is the applied force, a is throat thickness, and L_eff is the effective weld length (total length minus 2\u00d7a for end craters). Compare this stress to the allowable stress to check adequacy.\"}}\n]}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Weld Strength Calculator\",\"item\":\"https:\/\/vibromera.eu\/calculators\/weld-strength-calculator\/\"}]}<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&#038;family=JetBrains+Mono:wght@400;500;600&#038;family=Fraunces:opsz,wght@9..144,700;9..144,800&#038;display=swap\" rel=\"stylesheet\">\n\n<link rel=\"stylesheet\" href=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.css\">\n\n<style>:root{--vc-bg:#f4f1ec;--vc-surface:#fff;--vc-surface-alt:#f8f6f2;--vc-ink:#1a1a1a;--vc-ink-secondary:#5a5650;--vc-ink-muted:#8a857e;--vc-accent:#c85a2a;--vc-accent-hover:#b04d22;--vc-accent-light:#fdf0ea;--vc-blue:#2a5c8c;--vc-blue-light:#eaf1f8;--vc-green:#2a7a4b;--vc-green-light:#eaf8ef;--vc-yellow:#a67c00;--vc-yellow-light:#fef9e8;--vc-red:#b91c1c;--vc-red-light:#fef2f2;--vc-border:#d9d4cc;--vc-border-light:#e8e4dd;--vc-shadow:0 1px 3px rgba(26,26,26,.06),0 4px 12px rgba(26,26,26,.04);--vc-radius:8px;--vc-radius-lg:12px;--vc-font:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--vc-mono:'JetBrains Mono',monospace;--vc-display:'Fraunces',Georgia,serif}.vc-calculator{font-family:var(--vc-font);font-size:15px;line-height:1.65;color:var(--vc-ink);max-width:960px;margin:0 auto;padding:20px 16px 40px}.vc-calculator *{box-sizing:border-box}.vc-header{text-align:center;padding:48px 24px 40px;position:relative}.vc-header::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:80px;height:3px;background:var(--vc-accent);border-radius:2px}.vc-header-eyebrow{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:.15em;text-transform:uppercase;color:var(--vc-accent);margin:0 0 12px}.vc-header-title{font-family:var(--vc-display);font-size:clamp(24px,4vw,36px);font-weight:800;line-height:1.15;color:var(--vc-ink);margin:0 0 16px}.vc-header-subtitle{font-size:15px;color:var(--vc-ink-secondary);margin:0 auto 20px;max-width:600px}.vc-badges{display:inline-flex;gap:8px;flex-wrap:wrap;justify-content:center}.vc-badge{font-family:var(--vc-mono);font-size:11px;font-weight:500;padding:4px 10px;border-radius:4px;background:var(--vc-surface);border:1px solid var(--vc-border);color:var(--vc-ink-secondary)}.vc-card{background:var(--vc-surface);border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);box-shadow:var(--vc-shadow);overflow:hidden;margin-top:32px}.vc-form{padding:24px}.vc-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}@media(max-width:600px){.vc-form-grid{grid-template-columns:1fr}}.vc-field{display:flex;flex-direction:column}.vc-label{font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--vc-ink-secondary);margin-bottom:6px}.vc-label-hint{font-weight:400;text-transform:none;letter-spacing:0;color:var(--vc-ink-muted);font-size:11px}.vc-select,.vc-input{width:100%;padding:10px 12px;border:1.5px solid var(--vc-border);border-radius:6px;font-family:var(--vc-font);font-size:14px;color:var(--vc-ink);background:var(--vc-surface);transition:border-color .15s,box-shadow .15s}.vc-select{padding-right:36px;appearance:none;cursor:pointer;background-image:url(\"data:image\/svg+xml,%3Csvg xmlns='http:\/\/www.w3.org\/2000\/svg' width='16' height='16' fill='none' stroke='%235a5650' stroke-width='2'%3E%3Cpath d='M4 6l4 4 4-4'\/%3E%3C\/svg%3E\");background-repeat:no-repeat;background-position:right 10px center}.vc-select:focus,.vc-input:focus{outline:none;border-color:var(--vc-accent);box-shadow:0 0 0 3px rgba(200,90,42,.12)}\n.vc-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid var(--vc-border-light)}.vc-presets-label{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--vc-ink-muted);width:100%;margin-bottom:2px}.vc-preset-btn{padding:5px 12px;font-family:var(--vc-font);font-size:12px;font-weight:500;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);cursor:pointer;transition:all .15s}.vc-preset-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\n.vc-results{border-top:1px solid var(--vc-border-light);background:var(--vc-surface-alt);padding:0;max-height:0;overflow:hidden;transition:max-height .5s cubic-bezier(.4,0,.2,1),padding .3s}.vc-results.vc-visible{max-height:2000px;padding:24px}.vc-results-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.vc-results-title{font-family:var(--vc-display);font-size:20px;font-weight:700;color:var(--vc-ink);margin:0}.vc-copy-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface);font-family:var(--vc-font);font-size:12px;font-weight:500;color:var(--vc-ink-secondary);cursor:pointer;transition:all .15s}.vc-copy-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent)}.vc-copy-btn.vc-copied{background:var(--vc-green-light);border-color:var(--vc-green);color:var(--vc-green)}\n.vc-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}@media(max-width:500px){.vc-result-grid{grid-template-columns:1fr}}.vc-rcard{background:var(--vc-surface);border:1px solid var(--vc-border-light);border-radius:var(--vc-radius);padding:16px;transition:transform .2s}.vc-rcard:hover{transform:translateY(-1px)}.vc-rcard-primary{border-color:var(--vc-accent);border-width:2px;background:linear-gradient(135deg,#fdf6f2,var(--vc-surface));grid-column:1\/-1}.vc-rcard-label{font-family:var(--vc-mono);font-size:10px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--vc-ink-muted);margin-bottom:4px}.vc-rcard-value{font-family:var(--vc-mono);font-size:22px;font-weight:600;color:var(--vc-ink);line-height:1.2}.vc-rcard-primary .vc-rcard-value{font-size:30px;color:var(--vc-accent)}.vc-rcard-unit{font-size:14px;font-weight:400;color:var(--vc-ink-secondary)}\n.vc-section{margin-top:24px;border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);background:var(--vc-surface);box-shadow:var(--vc-shadow);overflow:hidden}.vc-section-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border:none;background:0 0;cursor:pointer;font-family:var(--vc-font);text-align:left;transition:background .15s}.vc-section-toggle:hover{background:var(--vc-surface-alt)}.vc-section-toggle-text{display:flex;align-items:center;gap:10px}.vc-section-icon{font-size:20px;line-height:1}.vc-section-title{font-family:var(--vc-display);font-size:18px;font-weight:700;color:var(--vc-ink);margin:0}.vc-section-chevron{width:20px;height:20px;color:var(--vc-ink-muted);transition:transform .3s;flex-shrink:0}.vc-section.vc-open .vc-section-chevron{transform:rotate(180deg)}.vc-section-body{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(.4,0,.2,1)}.vc-section.vc-open .vc-section-body{max-height:20000px}.vc-section-inner{padding:0 24px 24px;border-top:1px solid var(--vc-border-light)}\n.vc-theory h3{font-family:var(--vc-display);font-size:17px;font-weight:700;color:var(--vc-ink);margin:28px 0 10px}.vc-theory h3:first-child{margin-top:20px}.vc-theory p{font-size:14px;color:var(--vc-ink-secondary);margin:0 0 10px}.vc-formula-box{background:var(--vc-surface-alt);border:2px solid var(--vc-border);border-radius:6px;padding:14px 20px;font-family:var(--vc-mono);font-size:16px;font-weight:500;text-align:center;margin:14px 0;color:var(--vc-ink);overflow-x:auto}.vc-warning-box{background:var(--vc-yellow-light);border-left:3px solid var(--vc-yellow);padding:14px 16px;border-radius:0 6px 6px 0;margin:14px 0}\n.vc-faq-list{display:flex;flex-direction:column;gap:8px;margin-top:20px}.vc-faq-item{border:1px solid var(--vc-border-light);border-radius:6px;overflow:hidden}.vc-faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border:none;background:var(--vc-surface-alt);cursor:pointer;font-family:var(--vc-font);font-size:15px;font-weight:600;color:var(--vc-ink);text-align:left;transition:background .15s}.vc-faq-q:hover{background:#ede9e3}.vc-faq-chevron{width:16px;height:16px;color:var(--vc-ink-muted);flex-shrink:0;transition:transform .25s}.vc-faq-item.vc-open .vc-faq-chevron{transform:rotate(180deg)}.vc-faq-a{max-height:0;overflow:hidden;transition:max-height .35s}.vc-faq-item.vc-open .vc-faq-a{max-height:1200px}.vc-faq-a-inner{padding:14px 16px;border-top:1px solid var(--vc-border-light);font-size:14px;color:var(--vc-ink-secondary)}.vc-faq-a-inner p{margin:0 0 8px}.vc-faq-a-inner p:last-child{margin-bottom:0}\n.vc-related{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.vc-related-link{display:inline-block;padding:8px 16px;font-family:var(--vc-font);font-size:13px;font-weight:600;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);border:1px solid var(--vc-border);border-radius:var(--vc-radius);text-decoration:none;transition:all .15s}.vc-related-link:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\n.vc-promo{margin-top:24px;padding:20px;background:linear-gradient(135deg,var(--vc-accent-light),var(--vc-surface));border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);display:flex;align-items:center;gap:16px}.vc-promo-text{flex:1;font-size:14px;color:var(--vc-ink-secondary)}.vc-promo-text strong{color:var(--vc-ink)}.vc-promo-link{padding:8px 20px;font-size:13px;font-weight:700;color:#fff;background:var(--vc-accent);border-radius:var(--vc-radius);text-decoration:none;white-space:nowrap;transition:background .15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}\n.vc-footer{text-align:center;padding:32px 16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}\n@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}<\/style>\n\n<div class=\"vc-calculator\" id=\"vc-weld\">\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool<\/p>\n    <h1 class=\"vc-header-title\">Weld Strength Calculator<\/h1>\n    <p class=\"vc-header-subtitle\">Calculate fillet and butt weld capacity per EN 1993-1-8. Enter weld type, throat size, length, applied force, and material grade.<\/p>\n    <div class=\"vc-badges\"><span class=\"vc-badge\">EN 1993-1-8<\/span><span class=\"vc-badge\">Fillet &amp; Butt<\/span><span class=\"vc-badge\">Stress Check<\/span><\/div>\n<\/header>\n<div class=\"vc-card\">\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-type\">Weld Type<\/label>\n                <select class=\"vc-select\" id=\"vc-type\"><option value=\"fillet\" selected>Fillet weld<\/option><option value=\"butt\">Butt weld (full penetration)<\/option><\/select>\n            <\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-mat\">Material Grade<\/label>\n                <select class=\"vc-select\" id=\"vc-mat\">\n                    <option value=\"360\" data-bw=\"0.8\">S235 (fu=360 MPa, \u03b2w=0.8)<\/option>\n                    <option value=\"430\" data-bw=\"0.85\" selected>S275 (fu=430 MPa, \u03b2w=0.85)<\/option>\n                    <option value=\"510\" data-bw=\"0.9\">S355 (fu=510 MPa, \u03b2w=0.9)<\/option>\n                    <option value=\"520\" data-bw=\"1.0\">S420 (fu=520 MPa, \u03b2w=1.0)<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-leg\">Leg Size (s) or Throat (a) <span class=\"vc-label-hint\">(mm)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-leg\" step=\"any\" min=\"1\" value=\"6\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-length\">Weld Length <span class=\"vc-label-hint\">(mm)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-length\" step=\"any\" min=\"1\" value=\"200\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-force\">Applied Force <span class=\"vc-label-hint\">(kN)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-force\" step=\"any\" min=\"0\" value=\"50\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-gm2\">Safety Factor \u03b3M2<\/label><input class=\"vc-input\" type=\"number\" id=\"vc-gm2\" step=\"0.05\" min=\"1\" value=\"1.25\"><\/div>\n        <\/div>\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-t=\"fillet\" data-l=\"6\" data-len=\"200\" data-f=\"50\">Fillet 6mm \u00d7 200mm<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-t=\"fillet\" data-l=\"8\" data-len=\"300\" data-f=\"100\">Fillet 8mm \u00d7 300mm<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-t=\"butt\" data-l=\"10\" data-len=\"200\" data-f=\"150\">Butt 10mm \u00d7 200mm<\/button>\n        <\/div>\n    <\/form>\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Results<\/h2><button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy<\/button><\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">Weld Capacity<\/div><div class=\"vc-rcard-value\" id=\"vc-r-cap\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Applied Stress<\/div><div class=\"vc-rcard-value\" id=\"vc-r-stress\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Allowable Stress<\/div><div class=\"vc-rcard-value\" id=\"vc-r-allow\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Utilization Ratio<\/div><div class=\"vc-rcard-value\" id=\"vc-r-util\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Throat Thickness (a)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-throat\">\u2014<\/div><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n<div class=\"vc-section vc-open\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Theory<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\">\n        <h3>Fillet Weld (Simplified Method)<\/h3><div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n        <h3>Butt Weld<\/h3><p>Full penetration butt welds are treated as parent metal \u2014 allowable stress equals the plate allowable.<\/p>\n        <div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n        <div class=\"vc-warning-box\"><p style=\"margin:0;font-size:14px;color:var(--vc-ink-secondary)\"><strong>\u26a0\ufe0f<\/strong> This is a simplified analysis. For combined stresses, use the directional method per EN 1993-1-8 clause 4.5.3.<\/p><\/div>\n    <\/div><\/div>\n<\/div>\n<div class=\"vc-section\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udd17<\/span><span class=\"vc-section-title\">Related<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-related\"><a class=\"vc-related-link\" href=\"\/calculators\/weld-quality-iso5817\/\">Weld Quality ISO 5817<\/a><a class=\"vc-related-link\" href=\"\/calculators\/welding-process-iso4063\/\">Welding Process ISO 4063<\/a><a class=\"vc-related-link\" href=\"\/calculators\/bolt-strength-calculator\/\">Bolt Strength<\/a><\/div><\/div><\/div>\n<\/div>\n<div class=\"vc-section\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\u2753<\/span><span class=\"vc-section-title\">FAQ<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div><\/div><\/div>\n<\/div>\n<div class=\"vc-promo\"><div class=\"vc-promo-text\"><strong>Vibromera<\/strong> \u2014 Engineering calculators and instruments.<\/div><a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a><\/div>\n<footer class=\"vc-footer\"><p>\u00a9 2024\u20132026 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a><\/p><div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/div><\/footer>\n<\/div>\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function(){\n    'use strict';\n    function $(id){return document.getElementById(id)}\n    function fmt(n,d){if(isNaN(n)||!isFinite(n))return '\u2014';return n.toFixed(d===undefined?2:d).replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,'')}\n    function calculate(){\n        var type=$('vc-type').value;\n        var mOpt=$('vc-mat').selectedOptions[0];\n        var fu=parseFloat(mOpt.value),bw=parseFloat(mOpt.getAttribute('data-bw'));\n        var s=parseFloat($('vc-leg').value),L=parseFloat($('vc-length').value),F=parseFloat($('vc-force').value)*1000;\n        var gm2=parseFloat($('vc-gm2').value);\n        if(!s||!L||!gm2){$('vc-results').classList.remove('vc-visible');return}\n        var a,allow,Aw;\n        if(type==='fillet'){\n            a=0.707*s; \/\/ throat\n            allow=fu\/(Math.sqrt(3)*bw*gm2);\n        } else {\n            a=s; \/\/ butt weld: throat = plate thickness\n            allow=fu\/gm2;\n        }\n        Aw=a*L; \/\/ throat area mm\u00b2\n        var cap=allow*Aw\/1000; \/\/ kN\n        var stress=F>0?F\/Aw:0;\n        var util=allow>0?stress\/allow:0;\n        var status=util<=1?'\u2705 OK':'\u274c OVER';\n        $('vc-r-cap').innerHTML=fmt(cap,1)+' <span class=\"vc-rcard-unit\">kN<\/span> <span class=\"vc-rcard-unit\">'+status+'<\/span>';\n        $('vc-r-stress').innerHTML=fmt(stress,1)+' <span class=\"vc-rcard-unit\">MPa<\/span>';\n        $('vc-r-allow').innerHTML=fmt(allow,1)+' <span class=\"vc-rcard-unit\">MPa<\/span>';\n        $('vc-r-util').innerHTML=fmt(util*100,1)+' <span class=\"vc-rcard-unit\">%<\/span>';\n        $('vc-r-throat').innerHTML=fmt(a,1)+' <span class=\"vc-rcard-unit\">mm<\/span>';\n        $('vc-results').classList.add('vc-visible');\n    }\n    document.querySelectorAll('.vc-preset-btn').forEach(function(b){b.addEventListener('click',function(e){e.preventDefault();$('vc-type').value=this.getAttribute('data-t');$('vc-leg').value=this.getAttribute('data-l');$('vc-length').value=this.getAttribute('data-len');$('vc-force').value=this.getAttribute('data-f');calculate()})});\n    $('vc-form').addEventListener('input',calculate);$('vc-form').addEventListener('change',calculate);\n    $('vc-copy-btn').addEventListener('click',function(){var text='Weld Strength\\nCapacity: '+$('vc-r-cap').textContent+'\\nStress: '+$('vc-r-stress').textContent+'\\nAllowable: '+$('vc-r-allow').textContent+'\\nUtilization: '+$('vc-r-util').textContent+'\\nvibromera.eu';if(navigator.clipboard){navigator.clipboard.writeText(text).then(function(){var b=$('vc-copy-btn');b.classList.add('vc-copied');b.innerHTML='Copied!';setTimeout(function(){b.classList.remove('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy'},2000)})}});\n    document.querySelectorAll('.vc-section-toggle').forEach(function(btn){btn.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'))})});\n    var faqData=[{q:'How is fillet weld strength calculated?',a:'<p>Capacity = a \u00d7 L \u00d7 fu\/(\u221a3 \u00d7 \u03b2w \u00d7 \u03b3M2), where a=0.707\u00d7s (throat), L=length, fu=ultimate tensile, \u03b2w=correlation factor.<\/p>'},{q:'What is throat thickness?',a:'<p>Shortest distance from root to face. For equal-leg fillet: a = 0.707 \u00d7 leg size s.<\/p>'},{q:'Fillet vs butt weld difference?',a:'<p>Fillet joins surfaces at angle (T\/lap joints), loaded in shear. Butt joins end-to-end with full penetration, loaded in tension.<\/p>'},{q:'What is the correlation factor \u03b2w?',a:'<p>S235\u21920.8, S275\u21920.85, S355\u21920.9, S420\/S460\u21921.0. Per EN 1993-1-8.<\/p>'},{q:'How to calculate weld stress?',a:'<p>\u03c3 = F \/ (a \u00d7 L_eff). Compare against allowable to check adequacy.<\/p>'}];\n    var fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>'});\n    fl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(b)b.closest('.vc-faq-item').classList.toggle('vc-open')});\n    function renderFormulas(){try{\n        katex.render('F_{w,Rd} = \\\\frac{f_u}{\\\\sqrt{3}\\\\,\\\\beta_w\\\\,\\\\gamma_{M2}} \\\\times a \\\\times L \\\\quad [\\\\text{N}]',$('vc-katex-1'),{displayMode:true,throwOnError:false});\n        katex.render('\\\\sigma = \\\\frac{F}{a \\\\times L} \\\\leq \\\\frac{f_u}{\\\\gamma_{M2}}',$('vc-katex-2'),{displayMode:true,throwOnError:false});\n    }catch(e){}}\n    function init(){renderFormulas();calculate()}\n    if(document.readyState==='loading'){document.addEventListener('DOMContentLoaded',init)}else{init()}\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Gratis online kalkulator for kile- og stumpsveisestyrke. Skriv inn sveisetype, halsst\u00f8rrelse, lengde, belastning og materiale for \u00e5 kontrollere spenningen mot tillatte grenser.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100310","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100310","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100310\/revisions"}],"predecessor-version":[{"id":100930,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100310\/revisions\/100930"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/media?parent=100310"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/categories?post=100310"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/tags?post=100310"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}