{"id":49482,"date":"2026-07-14T10:00:03","date_gmt":"2026-07-14T08:00:03","guid":{"rendered":"https:\/\/www.bonomiacciai.it\/?p=49482"},"modified":"2026-06-04T13:46:27","modified_gmt":"2026-06-04T11:46:27","slug":"steel-impact-toughness-impact-resistance","status":"publish","type":"post","link":"https:\/\/www.bonomiacciai.it\/en\/steel-impact-toughness-impact-resistance\/","title":{"rendered":"Steel impact toughness: how the material reacts to impacts"},"content":{"rendered":"<div class=\"wpb-content-wrapper\" id=\"wpb-content-root\">[vc_row el_class=&#8221;ba-intro-lead&#8221;][vc_column][vc_column_text css=&#8221;&#8221;]After analyzing hardness, meaning the material\u2019s resistance to penetration and surface deformation, we move on to another fundamental property:<strong> steel impact toughness<\/strong>.<\/p>\n<p>Impact toughness indicates the ability of a material to absorb energy during an impact, before reaching fracture.<\/p>\n<p>It is a very important mechanical property for steels intended for applications where the material may be subjected to:<\/p>\n<ul>\n<li>sudden impacts<\/li>\n<li>impacts<\/li>\n<li>dynamic loads<\/li>\n<li>intense stresses<\/li>\n<li>critical operating conditions<\/li>\n<\/ul>\n<p>\ud83d\udc49 For this reason, impact toughness is often also referred to with the English term <strong>impact strength<\/strong>.<\/p>\n<p>The most widely used test to measure this property is the <strong>Charpy test.<\/strong>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/6&#8243;][\/vc_column][vc_column width=&#8221;2\/3&#8243;][vc_single_image image=&#8221;49533&#8243; add_caption=&#8221;yes&#8221; style=&#8221;vc_box_shadow&#8221; onclick=&#8221;img_link_large&#8221; css=&#8221;.vc_custom_1780488952387{border-radius: 15px !important;}&#8221;][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83d\udd0d What steel impact toughness means&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]<strong>Steel impact toughness<\/strong> measures the material\u2019s ability to absorb energy during a rapid stress, such as an impact.<\/p>\n<p>In practice, it makes it possible to understand how much energy the material can withstand before breaking.<\/p>\n<p>\ud83d\udc49 A steel with good impact toughness is a material that is better able to resist:<\/p>\n<ul>\n<li>crack formation<\/li>\n<li>fracture propagation<\/li>\n<li>sudden breakage<\/li>\n<li>the effects of impacts or shocks<\/li>\n<\/ul>\n<p>This parameter is particularly important when steel must guarantee reliability and safety even under demanding operating conditions.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83e\uddea Why impact toughness tests are important&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_column_text css=&#8221;&#8221;]<strong>Impact toughness tests<\/strong> on materials are essential because they make it possible to evaluate the steel\u2019s ability to resist impacts.<\/p>\n<p>\ud83d\udc49 In particular, they help determine whether the material is able to:<\/p>\n<ul>\n<li>absorb energy<\/li>\n<li>resist brittle fracture<\/li>\n<li>limit crack propagation<\/li>\n<li>maintain reliable behavior in service<\/li>\n<li>respond correctly to dynamic stresses<\/li>\n<\/ul>\n<p>Impact toughness should not be confused with ductility.<\/p>\n<p><strong>Ductility<\/strong> indicates the ability of a material to deform plastically before fracture.<\/p>\n<p><strong>Impact toughness,<\/strong> on the other hand, measures the energy absorbed during an impact, up to the fracture of the specimen.<\/p>\n<p>\ud83d\udc49 They are two related properties, but they are not equivalent.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\u2699\ufe0fThe Charpy test&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]The most widely used method for evaluating impact toughness is the <strong>Charpy test.<\/strong><\/p>\n<p>In this test, a standard specimen is struck by a pendulum, called a<strong> Charpy pendulum<\/strong>, with a single blow.<\/p>\n<p>\ud83d\udc49 The objective is to measure the energy required to break the specimen.<\/p>\n<p>The value obtained is expressed in <strong>Joules [J]<\/strong> and represents the material\u2019s ability to absorb energy during impact.<\/p>\n<p>The higher the measured value, the greater the energy absorbed by the material before fracture.<\/p>\n<p>\u2714 The Charpy test therefore provides a concrete indication of the impact resistance of steel.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/6&#8243;][\/vc_column][vc_column width=&#8221;2\/3&#8243;][vc_single_image image=&#8221;49536&#8243; add_caption=&#8221;yes&#8221; style=&#8221;vc_box_shadow&#8221; onclick=&#8221;img_link_large&#8221; css=&#8221;.vc_custom_1780489242641{border-radius: 15px !important;}&#8221;][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83d\udd27 How the Charpy test works&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]The test is carried out using a pendulum system.<\/p>\n<p>The specimen is placed on a dedicated support and struck in the center by an oscillating mass.<\/p>\n<p>\ud83d\udc49 During the impact:<\/p>\n<ul>\n<li>the pendulum strikes the specimen<\/li>\n<li>the specimen breaks<\/li>\n<li>the instrument measures the energy absorbed during fracture<\/li>\n<li>the result is expressed in Joules<\/li>\n<\/ul>\n<p>The difference between the initial energy of the pendulum and the residual energy after fracture makes it possible to calculate how much energy has been absorbed by the material.<\/p>\n<p>This data is fundamental for evaluating the behavior of steel in the presence of impacts.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83e\uddf1 Specimens and types of notch&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]The specimens used in impact toughness tests can have different geometries and different types of notch.<\/p>\n<p>The notch serves to concentrate the stress at a precise point, facilitating fracture initiation and making the test more controlled.<\/p>\n<p>Among the main types we find:<\/p>\n<ul>\n<li><strong>KV<\/strong>: specimen with a 45\u00b0 V-notch, 2 mm deep<\/li>\n<li><strong>KU<\/strong>: specimen with a U-notch, 5 mm deep<\/li>\n<li><strong>KVW<\/strong>: specimen without notch, used for specific evaluations related to ductility<\/li>\n<\/ul>\n<p>The standard specimen generally has:<\/p>\n<ul>\n<li>a length of <strong>55 mm<\/strong><\/li>\n<li>a square section of<strong> 10 x 10 mm<\/strong><\/li>\n<\/ul>\n<p>Specimens with reduced section can also be used, for example with a width of <strong>7.5 mm or 5 mm<\/strong>, when the dimensions of the material do not allow a standard specimen to be obtained.<\/p>\n<p>\ud83d\udc49 The choice of specimen and notch affects the correct interpretation of the material\u2019s behavior.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/6&#8243;][\/vc_column][vc_column width=&#8221;2\/3&#8243;]<div class=\"wpex-slider-preloaderimg wpex-relative\"><img width=\"1080\" height=\"1080\" src=\"https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2.jpg\" class=\"skip-lazy\" alt=\"KV specimen\" data-no-lazy=\"1\" srcset=\"https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2.jpg 1080w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-300x300.jpg 300w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-1024x1024.jpg 1024w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-150x150.jpg 150w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-768x768.jpg 768w\" sizes=\"(max-width: 1080px) 100vw, 1080px\" \/><\/div><div class=\"vcex-image-slider vcex-module wpex-slider slider-pro wpex-clr\" data-thumbnails=\"true\"><div class=\"wpex-slider-slides sp-slides\"><div class=\"wpex-slider-slide sp-slide\"><div class=\"wpex-slider-media wpex-relative\"><img width=\"1080\" height=\"1080\" src=\"https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2.jpg\" class=\"skip-lazy\" alt=\"KV specimen\" data-no-lazy=\"1\" srcset=\"https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2.jpg 1080w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-300x300.jpg 300w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-1024x1024.jpg 1024w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-150x150.jpg 150w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-768x768.jpg 768w\" sizes=\"(max-width: 1080px) 100vw, 1080px\" \/><\/div><\/div><div class=\"wpex-slider-slide sp-slide\"><div class=\"wpex-slider-media wpex-relative\"><img width=\"1080\" height=\"1080\" src=\"https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo.jpg\" class=\"skip-lazy\" alt=\"pendulum diagram\" data-no-lazy=\"1\" srcset=\"https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo.jpg 1080w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo-300x300.jpg 300w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo-1024x1024.jpg 1024w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo-150x150.jpg 150w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo-768x768.jpg 768w\" sizes=\"(max-width: 1080px) 100vw, 1080px\" \/><\/div><\/div><\/div><div class=\"wpex-slider-thumbnails sp-thumbnails\"><img width=\"1080\" height=\"1080\" src=\"https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2.jpg\" class=\"wpex-slider-thumbnail sp-thumbnail skip-lazy\" alt=\"KV specimen\" data-no-lazy=\"1\" srcset=\"https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2.jpg 1080w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-300x300.jpg 300w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-1024x1024.jpg 1024w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-150x150.jpg 150w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/ProvettaKV-2-768x768.jpg 768w\" sizes=\"(max-width: 1080px) 100vw, 1080px\" \/><img width=\"1080\" height=\"1080\" src=\"https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo.jpg\" class=\"wpex-slider-thumbnail sp-thumbnail skip-lazy\" alt=\"pendulum diagram\" data-no-lazy=\"1\" srcset=\"https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo.jpg 1080w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo-300x300.jpg 300w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo-1024x1024.jpg 1024w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo-150x150.jpg 150w, https:\/\/www.bonomiacciai.it\/wp-content\/uploads\/2026\/07\/Schema_del_pendolo-768x768.jpg 768w\" sizes=\"(max-width: 1080px) 100vw, 1080px\" \/><\/div><\/div>[\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83d\udd2c What influences steel impact toughness&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]Steel impact toughness depends on several metallurgical and microstructural factors.<\/p>\n<p>Among the main ones we find:<\/p>\n<ul>\n<li>chemical composition<\/li>\n<li>microstructure<\/li>\n<li>heat treatments<\/li>\n<li>grain size<\/li>\n<li>presence of non-metallic inclusions<\/li>\n<li>segregations in the material<\/li>\n<li>test temperature<\/li>\n<li>orientation of the sample with respect to processing<\/li>\n<\/ul>\n<p>Non-metallic inclusions, such as sulfides, oxides and silicates, can act as initiation points for cracks.<\/p>\n<p>\ud83d\udc49 This means that greater steel cleanliness can help improve the material\u2019s behavior in the event of impact.<\/p>\n<p>For this reason, in particularly critical applications, steels with a high level of metallurgical purity, such as remelted steels, may be preferred.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83c\udf21The role of temperature&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]Impact toughness can vary significantly depending on temperature.<\/p>\n<p>A material that shows tough behavior at room temperature can become more brittle at lower temperatures.<\/p>\n<p>\ud83d\udc49 For this reason, some impact toughness tests are performed at controlled temperatures, even below room temperature, when the final application requires it.<\/p>\n<p>This aspect is important for evaluating the behavior of steel in particular operating conditions, where impact resistance must also be guaranteed in severe environments.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83c\udfed Impact toughness tests in the BA context&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]In the Bonomi Acciai context, impact toughness tests represent an important control for evaluating the behavior of steel when subjected to impacts or dynamic stresses.<\/p>\n<p>Through the Charpy test, it is possible to measure the energy absorbed by the material during the fracture of a standardized specimen.<\/p>\n<p>At present, impact toughness tests are not yet performed internally in the BA laboratory. The instrument is expected to arrive in September. For the time being, BA relies on external laboratories such as <strong>AQM<\/strong> and <strong>KAIZEN<\/strong> for these checks.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83e\uddea When an impact toughness test is required&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]An impact toughness test may be required or recommended in several cases.<\/p>\n<p>This control represents one of the requirements included in the supply certificates for steels compliant with <a href=\"https:\/\/nadca.com\/\">NADCA<\/a> specifications, which are particularly used in the mould and high-performance applications sector.<\/p>\n<p>The impact toughness test can be performed as part of quality controls, to verify the conformity of the material with the values required by technical specifications or supply certificates, especially after heat treatments.<\/p>\n<p>In addition, this type of verification can be particularly useful in the case of failures or non-conformities detected during use of the component.<\/p>\n<p>For example, in the event of a mould failure, the impact toughness test can help determine whether the cause of the problem can be traced back to the material\u2019s characteristics or to other factors related to use or the production process.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83e\uddf1 Types of specimens used&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]<strong>KV-type<\/strong> specimens are normally used for impact toughness tests, in accordance with the main reference standards for notched Charpy tests.<\/p>\n<p>Standard KV specimens have dimensions of <strong>10 \u00d7 10 \u00d7 55 mm<\/strong> and feature a <strong>2 mm deep<\/strong> \u201cV\u201d notch, with a <strong>45\u00b0<\/strong> angle and a rounded root.<\/p>\n<p>This geometry makes it possible to evaluate the material\u2019s ability to absorb energy in the presence of a particularly severe stress concentration.<\/p>\n<p>In some cases, <strong>KU-type<\/strong> specimens may also be required. These are also generally <strong>10 \u00d7 10 \u00d7 55 mm<\/strong> in size, but feature a \u201cU\u201d notch, which is less pronounced than that of KV specimens.<\/p>\n<p>This configuration produces a lower stress concentration during the impact test.<\/p>\n<p>When the thickness of the material does not allow standard specimens to be obtained, reduced-size specimens may also be used, while still maintaining the same general geometry required by the standard.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83c\udf21\ufe0f Test temperature&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]Impact toughness tests can be performed both at room temperature and at controlled temperatures.<\/p>\n<p>In the BA context, the tests normally required, in accordance with <strong>NADCA#207<\/strong>, are performed at room temperature.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83d\udcca What the results are compared with&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]The results of impact toughness tests are compared with the reference values required by <strong>NADCA #207.<\/strong><\/p>\n<p>This comparison makes it possible to verify the material\u2019s conformity with the requirements needed for specific applications, particularly in the mould and high-performance applications sector.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\u2705 Added value for the customer&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]The impact toughness test helps evaluate the reliability, safety and suitability of steel in critical applications.<\/p>\n<p>For the customer, this means being able to rely on a greater guarantee regarding the suitability of the material for applications such as:<\/p>\n<ul>\n<li>moulds<\/li>\n<li>mechanical components<\/li>\n<li>parts subject to high operating stresses<\/li>\n<\/ul>\n<p>Impact toughness, in fact, is not just a number shown on a certificate: it is a concrete indication of how steel can behave when subjected to an impact[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83d\udd04 Connection to the series&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]In the path dedicated to steel quality, impact toughness represents a fundamental parameter for evaluating how the material reacts to impacts.<\/p>\n<p>After analyzing chemical composition and hardness, impact toughness makes it possible to understand another essential aspect: the steel\u2019s ability to absorb energy before fracture.<\/p>\n<p>\ud83d\udc49 In the next articles we will explore other elements found in controls and certificates, such as:<\/p>\n<ul>\n<li>grain size<\/li>\n<li>steel cleanliness<\/li>\n<li>microstructure<\/li>\n<li>ultrasonic testing<\/li>\n<li>radiometric testing<\/li>\n<\/ul>\n<p>Each parameter contributes to building a more complete view of material quality.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column el_class=&#8221;ba-box&#8221;][vc_custom_heading text=&#8221;\ud83c\udfaf Conclusion&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_empty_space height=&#8221;16px&#8221;][vc_column_text css=&#8221;&#8221;]Steel impact toughness is a fundamental property for evaluating the material\u2019s resistance to impacts.<\/p>\n<p>Through the Charpy test, it is possible to measure the energy absorbed during the fracture of a specimen and obtain a concrete indication of the material\u2019s behavior.<\/p>\n<p>\ud83d\udc49 Understanding impact toughness means understanding how much a steel is able to withstand impacts, dynamic stresses and critical operating conditions.<\/p>\n<p>It is not just laboratory data: it is an essential parameter for evaluating the safety, reliability and quality of the material.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_empty_space][\/vc_column][\/vc_row][vc_row full_width=&#8221;stretch_row&#8221; css=&#8221;.vc_custom_1775557578713{background-color: #ebebeb !important;}&#8221; visibility=&#8221;hidden-phone&#8221;][vc_column]<div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:35px;\"><\/div>[vc_column_text css=&#8221;&#8221;]\n<h3 style=\"text-align: center;\"><strong>Would you like to learn more about how steel controls and checks are managed?<\/strong><\/h3>\n<h3 style=\"text-align: center;\"><a href=\"https:\/\/www.bonomiacciai.it\/en\/contacts\/\">Contact us<\/a> to speak with our technical department.<br \/>\nOr fill in the form below to receive more information.<\/h3>\n[\/vc_column_text]<div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:35px;\"><\/div>[vc_row_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_custom_heading text=&#8221;Contact our technical department:&#8221; font_container=&#8221;tag:h2|font_size:26px|text_align:center|color:%23172028&#8243; use_theme_fonts=&#8221;yes&#8221;][\/vc_column_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_custom_heading text=&#8221;Fill in the form:&#8221; font_container=&#8221;tag:h2|font_size:26px|text_align:center|color:%23172028&#8243; 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css=&#8221;.vc_custom_1717678552691{background-color: #ebebeb !important;}&#8221; visibility=&#8221;visible-phone&#8221;][\/vc_row][vc_column][\/vc_column]<div class=\"vcex-spacing wpex-w-100 wpex-clear\" style=\"height:35px;\"><\/div>[vc_column_text css=&#8221;&#8221;]\n<p>I am text block. Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.<\/p>\n[\/vc_column_text]\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row el_class=&#8221;ba-intro-lead&#8221;][vc_column][vc_column_text css=&#8221;&#8221;]After analyzing hardness, meaning the material\u2019s resistance to penetration and surface deformation, we move on to another fundamental property: steel impact toughness. Impact toughness indicates the ability of a material to absorb energy during an impact, before reaching fracture. It is a very important mechanical property for steels intended for applications where the&hellip;<\/p>\n","protected":false},"author":10,"featured_media":49570,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2175,2176,1720],"tags":[3370,3367,1759,3052,3035,1694,3260,3361,3362,3359,3360,2978,3369,2108,3340,3341,3342,3356,3358,3364,3363,3343,3344,3345,3058,3346,3347,3348,3349,3350,3351,1975,3352,3353,3354,2162,3368,3365,3366,3355,3357,3021,3371,2989,2159,2105,1979],"post_series":[],"class_list":["post-49482","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-en","category-home-en","category-technical-contents","tag-3-1-steel-certificate","tag-absorbed-energy-steel","tag-acciai-speciali-en","tag-anatomia-di-un-acciaio","tag-anatomy-of-steel","tag-bonomi-acciai-en","tag-certificato-acciaio-3-1","tag-charpy-pendulum","tag-charpy-specimen","tag-charpy-test","tag-charpy-test-on-steel","tag-controllo-qualita-acciaio","tag-crack-propagation","tag-cricche-acciaio-en","tag-energia-assorbita-acciaio","tag-impact-strength-acciaio","tag-impact-toughness-acciaio","tag-impact-toughness-of-steel","tag-impact-toughness-tests-on-materials","tag-ku-specimen","tag-kv-specimen","tag-nadca-207","tag-pendolo-di-charpy","tag-propagazione-cricche","tag-proprieta-meccaniche-acciaio","tag-prova-charpy-acciaio","tag-prova-di-resilienza-acciaio","tag-prove-di-resilienza-sui-materiali","tag-prove-meccaniche-acciaio","tag-provetta-charpy","tag-provetta-ku","tag-provetta-kv-en","tag-resilienza-acciaio","tag-resilienza-dellacciaio","tag-resistenza-agli-urti-acciaio","tag-special-steels","tag-steel-cracks","tag-steel-impact-resistance","tag-steel-impact-strength","tag-steel-impact-toughness","tag-steel-impact-toughness-test","tag-steel-mechanical-properties","tag-steel-mechanical-testing","tag-steel-quality-control","tag-steel-toughness","tag-tenacita-acciaio-en","tag-test-di-charpy-en","entry","has-media"],"yoast_head":"<!-- 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