{"id":2788,"date":"2021-04-21T14:45:19","date_gmt":"2021-04-21T14:45:19","guid":{"rendered":"https:\/\/www.specialpipingmaterials.com\/?p=2788"},"modified":"2023-04-20T14:58:37","modified_gmt":"2023-04-20T14:58:37","slug":"impact-testing","status":"publish","type":"post","link":"https:\/\/specialpipingmaterials.com\/pt\/impact-testing\/","title":{"rendered":"Impact Testing"},"content":{"rendered":"<p class=\"qtranxs-available-languages-message qtranxs-available-languages-message-pt\">Desculpe, este conte\u00fado s\u00f3 est\u00e1 dispon\u00edvel em <a href=\"https:\/\/specialpipingmaterials.com\/en\/wp-json\/wp\/v2\/posts\/2788\" class=\"qtranxs-available-language-link qtranxs-available-language-link-en\" title=\"English\">English<\/a>. For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language.<\/p><p><em><strong>Impact testing is a type of destructive test that the team here at Special Piping Materials organises regularly and is just one of the value-added services that we can provide.<\/strong><\/em><\/p>\n<p><a href=\"https:\/\/specialpipingmaterials.com\/wp-content\/uploads\/2021\/04\/Impact-testing_stainless-steel-pipe.png\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-2789\" src=\"https:\/\/specialpipingmaterials.com\/wp-content\/uploads\/2021\/04\/Impact-testing_stainless-steel-pipe-300x169.png\" alt=\"Impact testing_stainless steel pipe\" width=\"785\" height=\"442\" srcset=\"https:\/\/specialpipingmaterials.com\/wp-content\/uploads\/2021\/04\/Impact-testing_stainless-steel-pipe-300x169.png 300w, https:\/\/specialpipingmaterials.com\/wp-content\/uploads\/2021\/04\/Impact-testing_stainless-steel-pipe-1024x577.png 1024w, https:\/\/specialpipingmaterials.com\/wp-content\/uploads\/2021\/04\/Impact-testing_stainless-steel-pipe-768x433.png 768w, https:\/\/specialpipingmaterials.com\/wp-content\/uploads\/2021\/04\/Impact-testing_stainless-steel-pipe-1536x865.png 1536w, https:\/\/specialpipingmaterials.com\/wp-content\/uploads\/2021\/04\/Impact-testing_stainless-steel-pipe-958x540.png 958w, https:\/\/specialpipingmaterials.com\/wp-content\/uploads\/2021\/04\/Impact-testing_stainless-steel-pipe.png 1800w\" sizes=\"(max-width: 785px) 100vw, 785px\" \/><\/a><\/p>\n<p>Impact <a href=\"https:\/\/specialpipingmaterials.com\/testing\/\">testing<\/a> is a specific way to measure the durability \u2013 or \u2018toughness\u2019 of a particular material. Brittle materials have low toughness, whereas strong materials have high toughness. Interestingly, a material\u2019s toughness does not stay constant but can be impacted by the environment it is in. For example, if it is in a particularly cold environment, or a corrosive one.<\/p>\n<p>Most of the duplex or super duplex piping specifications that we receive from our clients have a requirement for a low temperature impact test but it\u2019s not a standard requirement from ASTM.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>What is impact testing?<\/strong><\/p>\n<p>Impact Testing measures how much energy a material can absorb and endure at high velocity before it fractures. In essence, it is a quality control method that is employed in order to ensure that a material will perform in a certain way when it is in situ.<\/p>\n<p>The type of impact testing we will be focusing on in this blog is \u2018Charpy Impact Testing\u2019 \u2013 sometimes known as \u2018V-Notch\u2019 testing. Impact testing as we know it today \u2013 a pendulum fracture test \u2013 was first introduced by S.B. Russell in 1896. In 1901 Georges Charpy \u2018improved\u2019 the test by proposing a standardised method with a redesigned pendulum and notched sample, thus giving more precise specifications.<\/p>\n<p>Here are some examples of when and why Charpy Impact Testing is used:<\/p>\n<ul>\n<li>\u00a0&#8211; <strong>Subsea:<\/strong> Impact testing carried out on super duplex pipe in a test condition of -50 \u02dac in order to determine whether the material will be able to perform at extremes of temperature in subsea environments.<\/li>\n<li>\u00a0&#8211; <strong>The integrity of welds:<\/strong> The \u2018fusion zone\u2019 in the welded joints of a stainless steel piping structure can often have a duplex structure. This means it consists of both austenite and ferrite phases and thus the molecular make-up and durability of the weld must be checked.<\/li>\n<li>\u00a0&#8211; <strong>Cryogenic:<\/strong> A test environment of -196\u02daC is created and an impact test carried out in this condition to check whether the material will still be durable in this extreme situation \u2013 where liquid nitrogen is used for example.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Charpy Impact Testing is a type of destructive testing. Destructive testing works by a material being intentionally pushed to its limits until it \u2018fails\u2019 so the point of failure can be analysed and recorded. Destructive testing is widely used in heavy industries and can be effectively used to determine the durability of a material before it is relied upon to perform in the wider market.<\/p>\n<p>There are many advantages of destructive testing:<\/p>\n<ul>\n<li>\u00a0&#8211; Confirms the unique properties of a material<\/li>\n<li>\u00a0&#8211; Helps to lessen the chance failures, accidents and costs<\/li>\n<li>\u00a0&#8211; Can determine impact resistance<\/li>\n<li>\u00a0&#8211; Used to analyse ductility<\/li>\n<li>\u00a0&#8211; Can produce information about yield and ultimate tensile strength, fracture toughness and fatigue strength.<\/li>\n<li>\u00a0&#8211; Is often an essential aspect of engineering critical assessments<\/li>\n<li>\u00a0&#8211; Predicts the service life of a product<\/li>\n<li>\u00a0&#8211; Can help to determine the metallurgy and molecular level of a particular item<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>What is the process of Charpy Impact Testing?<\/strong><\/p>\n<p>Charpy Impact testing apparatus mainly comprises of a pendulum with a hammer that is of a known mass and length. The process is as follows:<\/p>\n<ol>\n<li>A standardised notched sample (the dimensions of the notch and size of the sample are very important) of the material that is being tested is held in place in a central horizontal position by a set of support anvils.<\/li>\n<li>A pendulum with a hammer that is of a known mass and length is swung from a pre-determined height.<\/li>\n<li>The amount of energy transferred to the material can then be calculated and analysed by comparing the difference in the height of the hammer before and after the fracture.<\/li>\n<li>The material\u2019s toughness is then determined based on the calculations of the energy transfer.<\/li>\n<\/ol>\n<p>Charpy tests are often carried out many times at many different temperatures. This means that charts can be plotted to demonstrate when a material will \u2018fail\u2019 in a particular environment.<\/p>\n<p>The usual test methods and specifications that are followed are:<\/p>\n<ul>\n<li>\u00a0&#8211; ASTM A370<\/li>\n<li>\u00a0&#8211; ASTM E23<\/li>\n<li>\u00a0&#8211; ASTM E208<\/li>\n<li>\u00a0&#8211; ISO 148<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>The advantages of Charpy Impact Testing<\/strong><\/p>\n<p>Some of the benefits of Charpy Impact Tests are:<\/p>\n<ul>\n<li>\u00a0&#8211; It is a relatively cost-effective test method to check for composites<\/li>\n<li>\u00a0&#8211; It is a fairly easy to perform<\/li>\n<li>\u00a0&#8211; Helps to accurately assess the quality of a product<\/li>\n<li>\u00a0&#8211; Very helpful when evaluating new products to be used in new environments<\/li>\n<li>\u00a0&#8211; Yields quick measurement results<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>SPM and Impact Testing<\/strong><\/p>\n<p>Special Piping Materials is very experienced with carrying out and organising a wide variety of destructive testing, with Charpy Impact Testing being one of them.<\/p>\n<p>We only work with ISO17025 accredited testing houses and all of our stock test pieces are prepared and tested in accordance with ASTM A370. Our super duplex and duplex stock on our shelves have been impact tested at -50\u02daC as standard on wall thicknesses over 6mm.<\/p>\n<p>If a client has a different requirement to this then we can do whatever is necessary \u2013 a bespoke and personal service always puts the customer\u2019s needs first!<\/p>\n<p>According to\u00a0ASTM\u00a0A370:<\/p>\n<ul>\n<li>\u00a0&#8211; The standard specimen size for Charpy impact testing is 10\u00a0mm \u00d7 10\u00a0mm \u00d7 55\u00a0mm.<\/li>\n<li>\u00a0&#8211; The subsize specimen sizes are: 10\u00a0mm \u00d7 7.5\u00a0mm \u00d7 55\u00a0mm, 10\u00a0mm \u00d7 6.7\u00a0mm \u00d7 55\u00a0mm, 10\u00a0mm \u00d7 5\u00a0mm \u00d7 55\u00a0mm, 10\u00a0mm \u00d7 3.3\u00a0mm \u00d7 55\u00a0mm, 10\u00a0mm \u00d7 2.5\u00a0mm \u00d7 55\u00a0mm.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>Speak to your account manager at Special Piping Materials today to arrange the specific testing your project requires.<\/p>\n<p><strong><em>#destructivetesting #stainlesssteel #duplex #superduplex #testing #quality #specialpipingmaterials #ImpactTesting #Charpy #Service #Bespoke<\/em><\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>Desculpe, este conte\u00fado s\u00f3 est\u00e1 dispon\u00edvel em English. For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language.Impact testing is a type of destructive test that the team here at Special Piping Materials organises regularly and is just one of [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":2789,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1,90,108],"tags":[],"class_list":["post-2788","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-all-posts","category-materials","category-quality"],"acf":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/posts\/2788","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/comments?post=2788"}],"version-history":[{"count":4,"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/posts\/2788\/revisions"}],"predecessor-version":[{"id":2793,"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/posts\/2788\/revisions\/2793"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/media\/2789"}],"wp:attachment":[{"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/media?parent=2788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/categories?post=2788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/specialpipingmaterials.com\/pt\/wp-json\/wp\/v2\/tags?post=2788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}