{"id":3132,"date":"2026-06-24T16:13:02","date_gmt":"2026-06-24T14:13:02","guid":{"rendered":"https:\/\/www.technical-center.de\/wiki\/bend-test\/"},"modified":"2026-06-24T16:13:02","modified_gmt":"2026-06-24T14:13:02","slug":"bend-test","status":"publish","type":"encyclopedia","link":"https:\/\/www.technical-center.de\/en\/glossary\/bend-test\/","title":{"rendered":"Bend test"},"content":{"rendered":"<p><strong>Definition:<\/strong> The bend test is a mechanical testing method for determining the deformation and fracture behaviour of a material under bending load. In this test, a specimen is bent by a defined force around a test mandrel or between supports. For metals, the procedure is governed by DIN EN ISO 7438.<\/p>\n<p><strong>Practical relevance:<\/strong> The properties assessed are bending strength, bending angle, crack formation and plastic formability. The test serves the quality control of sheets, <a class=\"tc-inlink\" href=\"\/en\/home\/welding-brazing-soldering\/weld-seam-testing\/\">weld seams<\/a> and <a class=\"tc-inlink\" href=\"\/en\/materials-engineering\/coating-technology-processes-and-applications\/\">coatings<\/a> as well as the assessment of ductility. Influencing factors are specimen geometry, bending radius and test speed. Visible cracks or spalling are considered a rejection criterion in accordance with the specification.<\/p>\n<p><strong>Decision-making perspectives:<\/strong><\/p>\n<ul>\n<li><strong>Technical decision-makers:<\/strong> Assessment of the formability and integrity of welded joints.<\/li>\n<li><strong>Purchasing\/project management:<\/strong> Definition of normative testing requirements and acceptance criteria.<\/li>\n<li><strong>Science:<\/strong> Analysis of stress distributions and crack initiation under bending load.<\/li>\n<li><strong>Insurance\/law:<\/strong> Documentation of mechanical properties in disputes over material quality.<\/li>\n<\/ul>\n<p><strong>Typical testing or verification methods:<\/strong> Three-point or four-point bend test, visual crack inspection, metallographic examination after testing.<\/p>\n<p><strong>FAQ:<\/strong><\/p>\n<ul>\n<li>Which standard applies to the bend test on metals?<\/li>\n<li>DIN EN ISO 7438 describes the performance and assessment of the bend test on metallic materials.<\/li>\n<\/ul>\n","protected":false},"author":0,"featured_media":0,"template":"","encyclopedia-tag":[],"class_list":["post-3132","encyclopedia","type-encyclopedia","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/encyclopedia\/3132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/encyclopedia"}],"about":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/types\/encyclopedia"}],"wp:attachment":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/media?parent=3132"}],"wp:term":[{"taxonomy":"encyclopedia-tag","embeddable":true,"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/encyclopedia-tag?post=3132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}