{"id":5842,"date":"2026-11-04T09:32:57","date_gmt":"2026-11-04T08:32:57","guid":{"rendered":"https:\/\/shockwave-clad.com\/?p=5842"},"modified":"2026-11-04T09:32:57","modified_gmt":"2026-11-04T08:32:57","slug":"astm-a578-controle-ultrasons-tole-plaquee","status":"publish","type":"post","link":"https:\/\/shockwave-clad.com\/fr\/astm-a578-controle-ultrasons-tole-plaquee\/","title":{"rendered":"ASTM A578 \/ SA-578\u00a0: contr\u00f4le par ultrasons des t\u00f4les et t\u00f4les plaqu\u00e9es"},"content":{"rendered":"<p>[et_pb_section fb_built=\u00a0\u00bb1&Prime; _builder_version=\u00a0\u00bb4.27.4&Prime; global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_row _builder_version=\u00a0\u00bb4.27.4&Prime; global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb4_4&Prime; _builder_version=\u00a0\u00bb4.27.4&Prime; global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_text _builder_version=\u00a0\u00bb4.27.4&Prime; global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n<p><strong>L&rsquo;ASTM A578 (ASME SA-578) est la norme de contr\u00f4le par ultrasons en incidence normale, par r\u00e9flexion, des t\u00f4les lamin\u00e9es en acier au carbone et alli\u00e9 de 10 mm (3\/8 in) et plus. Elle d\u00e9tecte les discontinuit\u00e9s internes parall\u00e8les \u00e0 la surface \u2013 d\u00e9doublures et, pour les t\u00f4les plaqu\u00e9es, zones o\u00f9 le placage n&rsquo;est pas li\u00e9 \u2013 et d\u00e9finit trois niveaux d&rsquo;acceptation\u00a0: A, B et C.<\/strong> Les sp\u00e9cifications de t\u00f4les plaqu\u00e9es ASME SA-263, SA-264 et SA-265 y renvoient pour le contr\u00f4le de la liaison, c&rsquo;est pourquoi presque toutes les commandes de t\u00f4les plaqu\u00e9es mentionnent l&rsquo;A578.<\/p>\n<h2>Ce que couvre la norme<\/h2>\n<ul>\n<li><strong>M\u00e9thode\u00a0:<\/strong> ultrasons en incidence normale (0\u00b0) par r\u00e9flexion, au contact ou en immersion.<\/li>\n<li><strong>Mat\u00e9riau\u00a0:<\/strong> t\u00f4les lamin\u00e9es en acier au carbone et alli\u00e9 de 10 mm (3\/8 in) et plus.<\/li>\n<li><strong>Ce qu&rsquo;elle d\u00e9tecte\u00a0:<\/strong> les discontinuit\u00e9s parall\u00e8les aux surfaces de laminage, comme les d\u00e9doublures ou une interface de placage non li\u00e9e.<\/li>\n<li><strong>Niveau par d\u00e9faut\u00a0:<\/strong> le niveau B s&rsquo;applique sauf accord contraire entre acheteur et fabricant.<\/li>\n<\/ul>\n<h2>Mat\u00e9riel et balayage<\/h2>\n<p>Le traducteur mesure 25 ou 30 mm (1 ou 1\u215b in) de diam\u00e8tre ou 25 mm de c\u00f4t\u00e9\u00a0; les syst\u00e8mes multi\u00e9l\u00e9ments sont admis avec une ouverture active \u00e9quivalente. Une fr\u00e9quence nominale de 2,25 MHz est recommand\u00e9e, et 5 MHz peuvent \u00eatre n\u00e9cessaires pour les t\u00f4les de moins de 20 mm. L&rsquo;appareil est r\u00e9gl\u00e9 pour que le premier \u00e9cho de fond d&rsquo;une zone saine atteigne 50 \u00e0 90 % de l&rsquo;\u00e9cran.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin-bottom:25px\">\n<tr>\n<th style=\"border:1px solid #ccc;padding:10px;text-align:left\">Option de balayage<\/th>\n<th style=\"border:1px solid #ccc;padding:10px;text-align:left\">Sch\u00e9ma<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">Quadrillage<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Lignes continues perpendiculaires espac\u00e9es de 225 mm (9 in) nominal<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">Passes transversales<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Passes continues parall\u00e8les, transversales \u00e0 l&rsquo;axe principal de la t\u00f4le, tous les 100 mm (4 in)<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">Passes longitudinales<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Passes continues parall\u00e8les \u00e0 l&rsquo;axe principal, tous les 75 mm (3 in) ou moins<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">Rives<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Une passe suppl\u00e9mentaire \u00e0 moins de 50 mm (2 in) de toutes les rives<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">Couverture 100 %<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Exigence compl\u00e9mentaire S1 \u2013 balayage continu de toute la surface<\/td>\n<\/tr>\n<\/table>\n<h2>Ce qui est enregistr\u00e9<\/h2>\n<ul>\n<li>Toute discontinuit\u00e9 provoquant une <strong>perte totale de l&rsquo;\u00e9cho de fond<\/strong>.<\/li>\n<li>Pour les t\u00f4les de 20 mm (3\/4 in) et plus\u00a0: toute indication d&rsquo;au moins 50 % de l&rsquo;\u00e9cho de fond initial accompagn\u00e9e d&rsquo;une perte de 50 % de l&rsquo;\u00e9cho de fond.<\/li>\n<li>Lorsqu&rsquo;une indication \u00e0 enregistrer est trouv\u00e9e sur une ligne du quadrillage, la zone environnante est balay\u00e9e et le contour marqu\u00e9 l\u00e0 o\u00f9 l&rsquo;\u00e9cho de fond et l&rsquo;indication ont la m\u00eame hauteur.<\/li>\n<\/ul>\n<h2>Niveaux d&rsquo;acceptation A, B et C<\/h2>\n<table style=\"width:100%;border-collapse:collapse;margin-bottom:25px\">\n<tr>\n<th style=\"border:1px solid #ccc;padding:10px;text-align:left\">Niveau<\/th>\n<th style=\"border:1px solid #ccc;padding:10px;text-align:left\">Refus\u00e9 lorsque<\/th>\n<th style=\"border:1px solid #ccc;padding:10px;text-align:left\">Usage typique<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">A<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Une perte totale et continue de l&rsquo;\u00e9cho de fond avec des indications dans le m\u00eame plan, qui ne peut \u00eatre inscrite dans un cercle de 75 mm (3 in) ou de la moiti\u00e9 de l&rsquo;\u00e9paisseur, la plus grande valeur \u00e9tant retenue<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Qualit\u00e9 g\u00e9n\u00e9rale des t\u00f4les<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">B (par d\u00e9faut)<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Comme le niveau A et, en plus, deux discontinuit\u00e9s plus petites ou davantage plus proches l&rsquo;une de l&rsquo;autre que le diam\u00e8tre de la plus grande<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Par d\u00e9faut si aucun niveau n&rsquo;est sp\u00e9cifi\u00e9<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">C<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Une perte totale et continue de l&rsquo;\u00e9cho de fond dans le m\u00eame plan qui ne peut \u00eatre inscrite dans un cercle de 25 mm (1 in)<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">Applications les plus exigeantes<\/td>\n<\/tr>\n<\/table>\n<p>L&rsquo;exigence compl\u00e9mentaire S2 durcit les r\u00e8gles pour les indications rapproch\u00e9es, S4 demande un certificat de conformit\u00e9 et S8 ajoute l&rsquo;\u00e9talonnage sur trous \u00e0 fond plat pour les t\u00f4les de 100 mm (4 in) et plus.<\/p>\n<h2>L&rsquo;A578 et les t\u00f4les plaqu\u00e9es<\/h2>\n<p>Pour les t\u00f4les plaqu\u00e9es, la liaison est jug\u00e9e selon la sp\u00e9cification de la t\u00f4le plaqu\u00e9e. L&rsquo;ASME SA-263 (aciers au chrome), la <a href=\"https:\/\/shockwave-clad.com\/fr\/tole-plaquee-inox\/\">SA-264<\/a> (inox et duplex) et la <a href=\"https:\/\/shockwave-clad.com\/fr\/asme-sa-265-tole-plaquee-nickel\/\">SA-265<\/a> (alliages de nickel) imposent un contr\u00f4le par ultrasons des t\u00f4les de 10 mm et plus selon les m\u00e9thodes de l&rsquo;A578 et d\u00e9finissent les classes de qualit\u00e9 de la liaison\u00a0:<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin-bottom:25px\">\n<tr>\n<th style=\"border:1px solid #ccc;padding:10px;text-align:left\">Classe de qualit\u00e9<\/th>\n<th style=\"border:1px solid #ccc;padding:10px;text-align:left\">Plus grande zone non li\u00e9e isol\u00e9e<\/th>\n<th style=\"border:1px solid #ccc;padding:10px;text-align:left\">Zone non li\u00e9e totale<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">Classe 1<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">25 mm (1 in) en plus grande dimension<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">\u2264 1 % de la surface plaqu\u00e9e<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">Classe 3<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">75 mm (3 in) en plus grande dimension<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">\u2264 3 % de la surface plaqu\u00e9e<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ccc;padding:10px\">Classe 5<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">58 cm\u00b2 (9 in\u00b2)<\/td>\n<td style=\"border:1px solid #ccc;padding:10px\">\u2264 5 % de la surface plaqu\u00e9e<\/td>\n<\/tr>\n<\/table>\n<p>Les t\u00f4les plaqu\u00e9es en m\u00e9taux r\u00e9actifs \u2013 titane, zirconium, tantale \u2013 rel\u00e8vent de l&rsquo;ASME SB-898, qui a ses propres exigences d&rsquo;ultrasons (voir <a href=\"https:\/\/shockwave-clad.com\/fr\/tole-plaquee-titane\/\">t\u00f4le plaqu\u00e9e titane<\/a>). Indiquez sur la commande la norme de contr\u00f4le et la classe, par exemple \u00ab UT selon SA-578, qualit\u00e9 de liaison classe 1 selon SA-264, couverture 100 % \u00bb.<\/p>\n<h2>Comment Shockwave contr\u00f4le les t\u00f4les plaqu\u00e9es<\/h2>\n<p>Chaque t\u00f4le de production est contr\u00f4l\u00e9e sur 100 % de la surface li\u00e9e par ultrasons multi\u00e9l\u00e9ments automatis\u00e9s, quelle que soit la classe command\u00e9e. Le contr\u00f4le suit une proc\u00e9dure \u00e9crite de Shockwave, qualifi\u00e9e selon l&rsquo;ASME Section V (articles 5 et 23), avec des crit\u00e8res d&rsquo;acceptation selon les ASTM A263, A264, A265, A578, B432 et B898, l&rsquo;EN 10160, la SEL 072 et les r\u00e8gles DNV et Lloyd&rsquo;s Register pour les joints de transition. La proc\u00e9dure est approuv\u00e9e par un examinateur de niveau 3 ISO 9712 \/ ASNT et les contr\u00f4les sont r\u00e9alis\u00e9s par du personnel certifi\u00e9 UT niveau 2. Les r\u00e9sultats figurent sur le certificat de contr\u00f4le, et les inspecteurs tiers sont les bienvenus.<\/p>\n<p>Voir nos <a href=\"https:\/\/shockwave-clad.com\/fr\/certifications-et-documentation\/\">certifications et documents<\/a>, toute la gamme de <a href=\"https:\/\/shockwave-clad.com\/fr\/toles-plaquees\/\">t\u00f4les plaqu\u00e9es<\/a>, ou envoyez votre sp\u00e9cification via notre <a href=\"https:\/\/shockwave-clad.com\/fr\/contact\/\">page de contact<\/a>.<\/p>\n<h2>Questions fr\u00e9quentes<\/h2>\n<h3>Qu&rsquo;est-ce que l&rsquo;ASTM A578\u00a0?<\/h3>\n<p>L&rsquo;ASTM A578 (ASME SA-578) est la norme de contr\u00f4le par ultrasons en incidence normale, par r\u00e9flexion, des t\u00f4les lamin\u00e9es en acier au carbone et alli\u00e9 de 10 mm et plus. Elle d\u00e9tecte les d\u00e9doublures et autres discontinuit\u00e9s parall\u00e8les \u00e0 la surface et d\u00e9finit les niveaux d&rsquo;acceptation A, B et C.<\/p>\n<h3>Quels sont les niveaux d&rsquo;acceptation de l&rsquo;A578\u00a0?<\/h3>\n<p>Le niveau A refuse une perte totale et continue de l&rsquo;\u00e9cho de fond qui ne peut \u00eatre inscrite dans un cercle de 75 mm ou de la moiti\u00e9 de l&rsquo;\u00e9paisseur\u00a0; le niveau B ajoute une r\u00e8gle pour les indications rapproch\u00e9es et s&rsquo;applique par d\u00e9faut\u00a0; le niveau C refuse toute zone de ce type plus grande qu&rsquo;un cercle de 25 mm.<\/p>\n<h3>L&rsquo;A578 est-elle utilis\u00e9e pour les t\u00f4les plaqu\u00e9es\u00a0?<\/h3>\n<p>Oui. Les ASME SA-263, SA-264 et SA-265 imposent un contr\u00f4le par ultrasons des t\u00f4les plaqu\u00e9es de 10 mm et plus selon les m\u00e9thodes de l&rsquo;A578, la liaison \u00e9tant jug\u00e9e selon la classe de qualit\u00e9 1, 3 ou 5.<\/p>\n<h3>L&rsquo;A578 impose-t-elle un balayage \u00e0 100 %\u00a0?<\/h3>\n<p>Non. La norme balaie selon un quadrillage ou des passes parall\u00e8les\u00a0; la couverture \u00e0 100 % est l&rsquo;exigence compl\u00e9mentaire S1. Shockwave contr\u00f4le en standard 100 % de la surface li\u00e9e de chaque t\u00f4le plaqu\u00e9e.<\/p>\n<h3>Quelle fr\u00e9quence utilise-t-on pour le contr\u00f4le selon l&rsquo;A578\u00a0?<\/h3>\n<p>Une fr\u00e9quence nominale de 2,25 MHz est recommand\u00e9e\u00a0; 5 MHz peuvent \u00eatre n\u00e9cessaires pour les t\u00f4les de moins de 20 mm.<\/p>\n<p><em>R\u00e9dig\u00e9 par Joeri Hofstede, PDG de Shockwave Metalworking Technologies \u2014 sp\u00e9cialistes du soudage par explosion sous vide depuis 1985.<\/em><\/p>\n<p>[\/et_pb_text][et_pb_code _builder_version=\u00a0\u00bb4.27.4&Prime; global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Qu'est-ce que l'ASTM A578\u00a0?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"L'ASTM A578 (ASME SA-578) est la norme de contr\u00f4le par ultrasons en incidence normale, par r\u00e9flexion, des t\u00f4les lamin\u00e9es en acier au carbone et alli\u00e9 de 10 mm et plus. Elle d\u00e9tecte les d\u00e9doublures et autres discontinuit\u00e9s parall\u00e8les \u00e0 la surface et d\u00e9finit les niveaux d'acceptation A, B et C.\"}},{\"@type\":\"Question\",\"name\":\"Quels sont les niveaux d'acceptation de l'A578\u00a0?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Le niveau A refuse une perte totale et continue de l'\u00e9cho de fond qui ne peut \u00eatre inscrite dans un cercle de 75 mm ou de la moiti\u00e9 de l'\u00e9paisseur\u00a0; le niveau B ajoute une r\u00e8gle pour les indications rapproch\u00e9es et s'applique par d\u00e9faut\u00a0; le niveau C refuse toute zone de ce type plus grande qu'un cercle de 25 mm.\"}},{\"@type\":\"Question\",\"name\":\"L'A578 est-elle utilis\u00e9e pour les t\u00f4les plaqu\u00e9es\u00a0?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Oui. Les ASME SA-263, SA-264 et SA-265 imposent un contr\u00f4le par ultrasons des t\u00f4les plaqu\u00e9es de 10 mm et plus selon les m\u00e9thodes de l'A578, la liaison \u00e9tant jug\u00e9e selon la classe de qualit\u00e9 1, 3 ou 5.\"}},{\"@type\":\"Question\",\"name\":\"L'A578 impose-t-elle un balayage \u00e0 100 %\u00a0?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Non. La norme balaie selon un quadrillage ou des passes parall\u00e8les\u00a0; la couverture \u00e0 100 % est l'exigence compl\u00e9mentaire S1. Shockwave contr\u00f4le en standard 100 % de la surface li\u00e9e de chaque t\u00f4le plaqu\u00e9e.\"}},{\"@type\":\"Question\",\"name\":\"Quelle fr\u00e9quence utilise-t-on pour le contr\u00f4le selon l'A578\u00a0?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Une fr\u00e9quence nominale de 2,25 MHz est recommand\u00e9e\u00a0; 5 MHz peuvent \u00eatre n\u00e9cessaires pour les t\u00f4les de moins de 20 mm.\"}}]}<\/script>[\/et_pb_code][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ce qu&rsquo;exige l&rsquo;ASTM A578 \/ ASME SA-578 pour le contr\u00f4le par ultrasons en incidence normale des t\u00f4les d&rsquo;acier, ses niveaux d&rsquo;acceptation et son application aux t\u00f4les plaqu\u00e9es.<\/p>\n","protected":false},"author":3,"featured_media":5833,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[54],"tags":[],"class_list":["post-5842","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bibliotheque-technique"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ASTM A578 \/ SA-578\u00a0: contr\u00f4le par ultrasons | Shockwave<\/title>\n<meta name=\"description\" content=\"ASTM A578 \/ SA-578 expliqu\u00e9e\u00a0: contr\u00f4le par ultrasons en incidence normale des t\u00f4les, maillage, enregistrement, niveaux A, B et C et application aux t\u00f4les plaqu\u00e9es.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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