{"id":103318,"date":"2021-01-19T15:17:54","date_gmt":"2021-01-19T14:17:54","guid":{"rendered":"https:\/\/staging.express.fr\/non-categorise\/what-are-the-differences-between-hard-and-soft-brazing\/"},"modified":"2026-02-11T14:37:58","modified_gmt":"2026-02-11T13:37:58","slug":"what-are-the-differences-between-hard-and-soft-brazing","status":"publish","type":"post","link":"https:\/\/staging.express.fr\/en\/pro-tips\/welding-brazing\/what-are-the-differences-between-hard-and-soft-brazing\/","title":{"rendered":"What are the differences between hard and soft brazing?"},"content":{"rendered":"\n<span style=\"font-weight: 400;\"><a href=\"https:\/\/www.express.fr\/produit\/poste-oxyacetylenique-koro-ref-2907\/\">La brasure forte<\/a> ou <a href=\"https:\/\/www.express.fr\/conseils-de-pro\/soudage-et-brasage\/quel-chalumeau-utiliser-pour-une-brasure-en-cuivre\/\">la brasure tendre<\/a> ne n\u00e9cessitent pas la m\u00eame temp\u00e9rature, ni le m\u00eame m\u00e9tal d\u2019apport. Par ailleurs, les cons\u00e9quences ne sont pas les m\u00eames pour la structure des m\u00e9taux. Voici les diff\u00e9rences entre ces deux m\u00e9thodes.\u00a0<\/span>\n<h2><b>La pr\u00e9paration des pi\u00e8ces<\/b><\/h2>\n<span style=\"font-weight: 400;\">La pr\u00e9paration des pi\u00e8ces est capitale pour les deux types de brasure. Pour aboutir \u00e0 une finition de qualit\u00e9, vos deux pi\u00e8ces doivent \u00eatre nettoy\u00e9es et ponc\u00e9es, m\u00eame si votre tube est neuf. Si vos pi\u00e8ces sont mal nettoy\u00e9es, le m\u00e9tal d\u2019apport ne pourra pas former une couche homog\u00e8ne et vous risquez de subir des suintements, voire des fuites, au niveau de votre brasure.<\/span>\n\n<span style=\"font-weight: 400;\">Pour commencer, si vous avez coup\u00e9 votre tube, vous devez l\u2019\u00e9bavurer. Toutes les imperfections qui subsistent font obstacle \u00e0 la diffusion du m\u00e9tal d\u2019apport. Utilisez un stylo \u00e9bavureur pour lisser l\u2019int\u00e9rieur du tube.<\/span>\n\n<span style=\"font-weight: 400;\">Ensuite, pour les deux parties, vous pouvez utiliser indiff\u00e9remment de la toile \u00e9meri ou du papier de verre. Le but est de permettre au m\u00e9tal d\u2019apport de se r\u00e9pandre par capillarit\u00e9.<\/span>\n\n<span style=\"font-weight: 400;\">Poncez jusqu\u2019\u00e0 obtenir la brillance du tube. S\u2019il est trop fin pour y passer le doigt, enroulez votre toile \u00e9meri autour d\u2019un tournevis pour nettoyer l\u2019int\u00e9rieur.<\/span>\n<h2><b>La brasure tendre\u00a0<\/b><\/h2>\n<h3><b>Le mat\u00e9riel<\/b><\/h3>\n<span style=\"font-weight: 400;\">Pour une brasure tendre entre deux tubes de cuivre par exemple, il vous faut une <a href=\"https:\/\/www.express.fr\/conseils-de-pro\/focus-produits-express\/les-lampes-multifonctions-express\/\"><strong>lampe \u00e0 souder au gaz<\/strong><\/a>, car vous n\u2019avez pas besoin d\u2019une tr\u00e8s haute temp\u00e9rature de chauffe. Le fil d\u2019\u00e9tain est le plus souvent utilis\u00e9 comme m\u00e9tal d\u2019apport.\u00a0<\/span>\n\n<div id=\"attachment_47920\" style=\"width: 211px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/staging.express.fr\/wp-content\/uploads\/2026\/02\/1840-publication-1.jpg\"><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-47920\" class=\"wp-image-47920\" src=\"https:\/\/staging.express.fr\/wp-content\/uploads\/2026\/02\/1840-publication-1-300x300.jpg\" alt=\"L'eau \u00e0 souder R\u00e9f. 1840\" width=\"201\" height=\"196\" \/><\/a><p id=\"caption-attachment-47920\" class=\"wp-caption-text\">L&#8217;eau \u00e0 souder facilite la soudure \u00e9tain<\/p><\/div>\n<h3><b>La cr\u00e9ation de la brasure tendre<\/b><\/h3>\n<span style=\"font-weight: 400;\">Vous devez enduire les deux parties avec un d\u00e9capant, \u00e0 l\u2019aide d\u2019un pinceau. Ce d\u00e9capant doit correspondre \u00e0 votre m\u00e9tal d\u2019apport, en l\u2019occurrence ici, l\u2019\u00e9tain.\u00a0<\/span>\n\n<span style=\"font-weight: 400;\">Maintenant que tout est pr\u00eat, allumez votre lampe \u00e0 souder \u00e0 gaz. Vous allez chauffer uniquement la partie o\u00f9 vous vous souhaitez que la brasure p\u00e9n\u00e8tre.\u00a0<\/span>\n\n<span style=\"font-weight: 400;\">Tr\u00e8s important\u00a0: vous ne chauffez pas votre m\u00e9tal d\u2019apport, mais les pi\u00e8ces sur lesquelles vous souhaitez cr\u00e9er la brasure.<\/span>\n\n<span style=\"font-weight: 400;\">Faites un ou plusieurs tours avec votre fil d\u2019\u00e9tain, en fonction de l\u2019ampleur de la brasure. Il se r\u00e9pand par capillarit\u00e9 sur les pi\u00e8ces chaudes.\u00a0<\/span>\n\n<span style=\"font-weight: 400;\">En refroidissant, soit naturellement, soit en plongeant la brasure dans de l\u2019eau, votre travail est termin\u00e9.<\/span>\n<h2><b>La brasure forte\u00a0<\/b><\/h2>\n<h3><b>Le mat\u00e9riel<\/b><\/h3>\n<span style=\"font-weight: 400;\">Pour la brasure forte, vous avez besoin d\u2019une temp\u00e9rature sup\u00e9rieure que vous procure le <strong>chalumeau oxyg\u00e8ne ac\u00e9tyl\u00e8ne<\/strong>. Plut\u00f4t que du fil d\u2019\u00e9tain, vous utilisez comme m\u00e9tal d\u2019apport des baguettes cupro phosphore.<\/span>\n<h3><b>La cr\u00e9ation de la brasure tendre<\/b><\/h3>\n<span style=\"font-weight: 400;\">Vous devez utiliser un d\u00e9capant appropri\u00e9 pour votre m\u00e9tal d\u2019apport. Avec la brasure forte, vous ne l\u2019\u00e9pandez pas sur les pi\u00e8ces \u00e0 assembler, mais directement sur la baguette.<\/span>\n\n<span style=\"font-weight: 400;\">Commencez \u00e0 chauffer vos pi\u00e8ces et d\u00e9posez une goutte de m\u00e9tal d\u2019apport. Lorsqu\u2019elle se liqu\u00e9fie et se r\u00e9pand, c\u2019est le signe que les pi\u00e8ces sont \u00e0 bonne temp\u00e9rature. Faites alors le tour avec la baguette, puis r\u00e9chauffez le tout pour vous assurer d\u2019obtenir une mati\u00e8re uniforme.<\/span>\n<h2><b>Compa<a href=\"https:\/\/staging.express.fr\/wp-content\/uploads\/2026\/02\/Nouvelle_Lance_Vulcane.jpg\"><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\" wp-image-6128 alignleft\" src=\"https:\/\/staging.express.fr\/wp-content\/uploads\/2026\/02\/Nouvelle_Lance_Vulcane-300x200.jpg\" alt=\"Nouvelle lance Vulcane\" width=\"273\" height=\"159\" \/><\/a>raison brasure tendre et brasure forte<\/b><\/h2>\n<span style=\"font-weight: 400;\">Si vous devez effectuer les deux types de brasure sur une m\u00eame structure, commencez par la brasure forte. Comme vous allez chauffer \u00e0 plus haute temp\u00e9rature, vous ne risquez pas d\u2019ab\u00eemer votre brasure tendre.\u00a0<\/span>\n\n<span style=\"font-weight: 400;\">Les deux types de brasures r\u00e9sistent \u00e9galement \u00e0 la pression, m\u00eame en allant jusqu\u2019\u00e0 plus de 40 bar. En revanche, la temp\u00e9rature suppl\u00e9mentaire de la brasure forte a recuit le cuivre. Ceci a pour cons\u00e9quence de d\u00e9grader les propri\u00e9t\u00e9s m\u00e9caniques du cuivre et de le rendre mall\u00e9able. Cela signifie que si vous devez ensuite effectuer une torsion proche de la brasure \u2013 pour serrer un joint par exemple \u2013 vous devez prendre vos pr\u00e9cautions, car le tube de cuivre risque de se torsader.<\/span>\n<h2>Produits associ\u00e9s<\/h2>\n<div class=\"woocommerce columns-1 \"><\/div><div class=\"woocommerce columns-1 \"><\/div>\n<h2>Products associated with this item available on express<\/h2>\n<div class=\"woocommerce columns-4 \"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>La brasure forte ou la brasure tendre ne n\u00e9cessitent pas la m\u00eame temp\u00e9rature, ni le m\u00eame m\u00e9tal d\u2019apport. Par ailleurs, les cons\u00e9quences ne sont pas&#8230;<\/p>\n","protected":false},"author":2,"featured_media":71998,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[417,417],"tags":[],"class_list":["post-103318","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-welding-brazing"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What are the differences between hard and soft brazing? - Express<\/title>\n<meta name=\"description\" content=\"Hard solder or soft solder do not require the same temperature or the same filler metal. 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