{"id":8629,"date":"2025-04-24T14:25:43","date_gmt":"2025-04-24T14:25:43","guid":{"rendered":"https:\/\/premiumalu.com\/mastering-4047-aluminum-expert-tips-and-techniques\/"},"modified":"2026-10-08T01:26:29","modified_gmt":"2026-10-08T01:26:29","slug":"masterizacao-4047-aluminum-dicas-e-tecnicas-de-especialistas","status":"publish","type":"post","link":"https:\/\/premiumalu.com\/pt\/mastering-4047-aluminum-expert-tips-and-techniques\/","title":{"rendered":"Alum\u00ednio 4047: Material de Adi\u00e7\u00e3o para Brasagem e Arame de Solda em uma \u00danica Liga"},"content":{"rendered":"<p class=\"wp-block-paragraph\">4047 \u00e9 uma liga de enchimento de alum\u00ednio-sil\u00edcio contendo 11\u201313% de sil\u00edcio. N\u00e3o \u00e9 um grau estrutural trabalhado \u2014 n\u00e3o se constr\u00f3i uma estrutura com ela. Compra-se para unir outras pe\u00e7as de alum\u00ednio, e desempenha essa fun\u00e7\u00e3o em dois processos diferentes sob duas normas diferentes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O 4047 \u00e9 especificado em duas fun\u00e7\u00f5es sob duas normas diferentes \u2014 AWS A5.8 BAlSi-4 como material de adi\u00e7\u00e3o para brasagem, AWS A5.10 ER4047 como arame de soldagem. Indique a fun\u00e7\u00e3o no pedido, pois a forma, o processo e a documenta\u00e7\u00e3o decorrem dela.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Um limite decide se funciona ou n\u00e3o: a temperatura de solidus do metal de base que est\u00e1 a ser unido.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-cover.webp\" alt=\"4047 capa\" class=\"wp-image-10668\" srcset=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-cover.webp 800w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-cover-300x225.webp 300w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-cover-768x576.webp 768w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-cover-16x12.webp 16w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-cover-600x450.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Duas Normas, Uma Liga<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A mesma composi\u00e7\u00e3o do 4047 est\u00e1 registada sob duas especifica\u00e7\u00f5es AWS, e a que se aplica depende do processo, n\u00e3o da liga:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Padr\u00e3o<\/td><td>Designa\u00e7\u00e3o<\/td><td>Processo<\/td><td>Forma t\u00edpica<\/td><\/tr><tr><td>AWS A5.8 \/ A5.8M<\/td><td>BAlSi-4<\/td><td>Brasagem<\/td><td>Folha fina, tira, pr\u00e9-formas, pasta, camada de revestimento em chapa de brasagem<\/td><\/tr><tr><td>AWS A5.10 \/ A5.10M<\/td><td>ER4047<\/td><td>Soldagem GTAW (TIG) e GMAW (MIG)<\/td><td>Arame em bobina ou cortado ao comprimento, vareta<\/td><\/tr><tr><td>AMS 4185<\/td><td>\u2014<\/td><td>Material de adi\u00e7\u00e3o aeroespacial<\/td><td>Arame, vareta<\/td><\/tr><tr><td>ISO 17672<\/td><td>Al 112<\/td><td>Brasagem<\/td><td>Como acima<\/td><\/tr><tr><td>GB\/T 13815<\/td><td>BAl88Si<\/td><td>Brasagem<\/td><td>Como acima<\/td><\/tr><tr><td>PT<\/td><td>EN AW-4047<\/td><td>Ambos<\/td><td>Como acima<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Um material de adi\u00e7\u00e3o vendido como \u201carame 4047\u201d para soldagem TIG e um material de adi\u00e7\u00e3o vendido como \u201cfolha fina 4047\u201d para brasagem em forno s\u00e3o a mesma liga em formas diferentes. O que muda \u00e9 o processo, a folga da junta e a temperatura a que o conjunto \u00e9 submetido.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-two-processes.webp\" alt=\"4047-two-processes\" class=\"wp-image-10669\" srcset=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-two-processes.webp 800w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-two-processes-300x225.webp 300w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-two-processes-768x576.webp 768w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-two-processes-16x12.webp 16w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-two-processes-600x450.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Vale a pena afirmar isto claramente porque a afirma\u00e7\u00e3o oposta circula amplamente: <strong>O 4047 pode ser utilizado para soldagem TIG e MIG.<\/strong> O ER4047 \u00e9 uma classifica\u00e7\u00e3o listada na AWS A5.10, e \u00e9 uma escolha normal para repara\u00e7\u00e3o de alum\u00ednio fundido, trabalho em paredes finas de 6xxx e tubagem de permutadores de calor. N\u00e3o \u00e9 o material de adi\u00e7\u00e3o predefinido para todas as soldas em 6xxx \u2014 esse \u00e9 o ER4043 \u2014 mas \u201co 4047 \u00e9 um material de adi\u00e7\u00e3o para brasagem e n\u00e3o pode ser soldado\u201d est\u00e1 incorreto.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Composi\u00e7\u00e3o qu\u00edmica<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O sil\u00edcio pr\u00f3ximo do ponto eut\u00e9tico do Al-Si \u00e9 todo o design. O ferro, o cobre, o mangan\u00eas, o magn\u00e9sio e o zinco s\u00e3o impurezas limitadas em vez de adi\u00e7\u00f5es deliberadas:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Elemento<\/td><td>Conte\u00fado (%)<\/td><td>Fun\u00e7\u00e3o<\/td><\/tr><tr><td>Sil\u00edcio (Si)<\/td><td>11.0\u201313.0<\/td><td>Formador de eut\u00e9tico \u2014 determina o ponto de fus\u00e3o e a fluidez<\/td><\/tr><tr><td>Ferro (Fe)<\/td><td>\u2264 0,8<\/td><td>Impureza<\/td><\/tr><tr><td>Cobre (Cu)<\/td><td>\u2264 0,30<\/td><td>Impureza<\/td><\/tr><tr><td>Mangan\u00eas (Mn)<\/td><td>\u2264 0.15<\/td><td>Impureza<\/td><\/tr><tr><td>Magn\u00e9sio (Mg)<\/td><td>\u2264 0,10<\/td><td>Impureza, mantida baixa para brasagem em forno<\/td><\/tr><tr><td>Zinco (Zn)<\/td><td>\u2264 0,20<\/td><td>Impureza<\/td><\/tr><tr><td>Ber\u00edlio (Be)<\/td><td>\u2264 0,0003<\/td><td>Limite aplicado sob a classifica\u00e7\u00e3o de arame de soldagem<\/td><\/tr><tr><td>Outros, cada \/ total<\/td><td>\u2264 0,05 \/ \u2264 0,15<\/td><td>Impureza<\/td><\/tr><tr><td>Alum\u00ednio (Al)<\/td><td>Restante<\/td><td>Matriz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">O magn\u00e9sio \u00e9 limitado a 0,10% por uma raz\u00e3o. A brasagem em forno e em atmosfera controlada depende de o material de adi\u00e7\u00e3o se manter limpo; o magn\u00e9sio no material de adi\u00e7\u00e3o complica o controlo do fluxo e da atmosfera. Tenha esse limite em mente quando um fornecedor oferecer uma liga \u201ctipo 4047\u201d com um limite de magn\u00e9sio mais permissivo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O 4047 n\u00e3o \u00e9 trat\u00e1vel termicamente. N\u00e3o h\u00e1 resposta de endurecimento por precipita\u00e7\u00e3o a explorar, pelo que nenhum envelhecimento p\u00f3s-brasagem ou p\u00f3s-soldagem aumentar\u00e1 a sua resist\u00eancia.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Porque \u00e9 que a Composi\u00e7\u00e3o Pr\u00f3xima do Eut\u00e9tico \u00e9 Importante<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00eas propriedades decorrem diretamente do teor de sil\u00edcio, e todas as tr\u00eas s\u00e3o a raz\u00e3o pela qual o 4047 existe:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Intervalo de fus\u00e3o.<\/strong> Solidus 577 \u00b0C, liquidus 582 \u00b0C \u2014 uma zona pastosa de aproximadamente 5 \u00b0C. As fichas t\u00e9cnicas publicadas indicam 1070\u20131080 \u00b0F (577\u2013582 \u00b0C) como intervalo de fus\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Comportamento de solidifica\u00e7\u00e3o.<\/strong> Como a liga se situa quase na composi\u00e7\u00e3o eut\u00e9tica, passa de totalmente l\u00edquida a totalmente s\u00f3lida dentro de alguns graus. N\u00e3o h\u00e1 uma longa fase pastosa, o que \u00e9 o que suprime a fissura\u00e7\u00e3o a quente na junta.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fluidez.<\/strong> O l\u00edquido de baixo ponto de fus\u00e3o e baixa viscosidade penetra por capilaridade nas folgas estreitas, o que torna poss\u00edveis juntas brasadas estanques em permutadores de calor.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Compare-se com o 4043 (4,5\u20136,0% Si). O seu solidus situa-se na mesma vizinhan\u00e7a, mas o seu liquidus \u00e9 muito mais elevado, originando um amplo intervalo pastoso. Como arame de soldagem isso \u00e9 aceit\u00e1vel. Como material de adi\u00e7\u00e3o para brasagem de juntas estreitas e estanques n\u00e3o \u00e9 \u2014 o material de adi\u00e7\u00e3o permanece demasiado tempo semiss\u00f3lido para penetrar cleanly numa folga estreita.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">O 4047 como Material de Adi\u00e7\u00e3o para Brasagem<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Esta \u00e9 a aplica\u00e7\u00e3o principal do 4047 e a raz\u00e3o pela qual foi desenvolvido.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Processos.<\/strong> Brasagem em atmosfera controlada (CAB), brasagem em v\u00e1cuo e brasagem por ma\u00e7arico.<\/li>\n\n\n\n<li><strong>Temperatura t\u00edpica de brasagem.<\/strong> Cerca de 580\u2013605 \u00b0C. A pr\u00e1tica de oficina publicada coloca o pico nessa faixa, com a extremidade superior evitada para proteger se\u00e7\u00f5es finas do metal-base.<\/li>\n\n\n\n<li><strong>Folga da junta.<\/strong> Aproximadamente 0,05\u20130,20 mm. Abaixo disso, o fluxo capilar ainda funciona; acima disso, o metal de adi\u00e7\u00e3o \u00e9 fluido o suficiente para drenar para fora da junta antes de solidificar.<\/li>\n\n\n\n<li><strong>Formas.<\/strong> Folha e tira, pr\u00e9-formas e an\u00e9is, pasta, e a camada de revestimento em chapa de brasagem multicamada.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Conjuntos brasados t\u00edpicos: radiadores automotivos e n\u00facleos de aquecedores, resfriadores de ar de admiss\u00e3o, juntas de condensadores e evaporadores de HVAC, conjuntos de placas de refrigera\u00e7\u00e3o, e trocadores de calor aeroespaciais e resfriadores de \u00f3leo resfriados por combust\u00edvel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Uma expectativa a corrigir: a AWS A5.8 classifica o <em>metal de adi\u00e7\u00e3o<\/em> \u2014 sua qu\u00edmica e comportamento de fus\u00e3o. Ela n\u00e3o atribui uma resist\u00eancia \u00e0 junta brasada. A resist\u00eancia da junta vem do metal-base, do projeto da junta, da folga e do ciclo t\u00e9rmico. Se um projeto precisa de um n\u00famero qualificado, ele deve vir de ensaios da junta real, n\u00e3o da classifica\u00e7\u00e3o do metal de adi\u00e7\u00e3o.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4047 como Arame de Soldagem (ER4047)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sob a AWS A5.10, a mesma liga \u00e9 designada como ER4047 para GTAW e GMAW.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Onde \u00e9 uma boa escolha:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reparo de alum\u00ednio fundido e ligas de fundi\u00e7\u00e3o como A356 \u2014 o alto teor de sil\u00edcio corresponde ao metal-base e reduz a porosidade.<\/li>\n\n\n\n<li>Conjuntos de parede fina e sens\u00edveis ao calor, onde o liquidus mais baixo reduz a distor\u00e7\u00e3o.<\/li>\n\n\n\n<li>Juntas 6xxx sens\u00edveis a trincas, onde o estreito intervalo de solidifica\u00e7\u00e3o trabalha a seu favor.<\/li>\n\n\n\n<li>Trocadores de calor, condensadores, tubula\u00e7\u00e3o de ar-condicionado e trabalhos em radiadores \u2014 o mesmo comportamento capilar que o torna um bom metal de adi\u00e7\u00e3o para brasagem ajuda-o a molhar um ajuste justo.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Onde o 4043 o supera:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Qualquer junta que ser\u00e1 anodizada e com correspond\u00eancia de cor. O metal de solda com alto teor de sil\u00edcio anodiza para um cinza-escuro que n\u00e3o corresponde ao metal-base; o 4043 proporciona uma correspond\u00eancia muito mais pr\u00f3xima.<\/li>\n\n\n\n<li>Soldagem geral de 6xxx onde a sensibilidade a trincas n\u00e3o \u00e9 a preocupa\u00e7\u00e3o principal. O ER4043 \u00e9 o metal de adi\u00e7\u00e3o padr\u00e3o para o 6061 na maioria das oficinas, e geralmente \u00e9 mais barato e mais amplamente estocado.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Onde nenhum dos dois se aplica:<\/strong> soldagem de metais-base 5xxx. Use 5356 nesse caso (ver a compara\u00e7\u00e3o abaixo).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A Regra do Solidus do Metal-Base<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Esta \u00e9 a verifica\u00e7\u00e3o que decide a maioria dos trabalhos com 4047, e \u00e9 a mais frequentemente ignorada.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Um metal de adi\u00e7\u00e3o para brasagem deve estar completamente l\u00edquido enquanto o metal-base ainda est\u00e1 completamente s\u00f3lido. Isso significa que o <strong>solidus<\/strong> do metal-base deve estar acima do <strong>liquidus<\/strong> do metal de adi\u00e7\u00e3o (582 \u00b0C para o 4047) com uma margem de trabalho, n\u00e3o apenas alguns graus acima. Na pr\u00e1tica, busque uma margem de pelo menos 25\u201330 \u00b0C.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Metal base<\/td><td>Solidus (\u00b0C, valores publicados t\u00edpicos)<\/td><td>Brasagem com 4047<\/td><\/tr><tr><td>1100<\/td><td>~646<\/td><td>Margem confort\u00e1vel<\/td><\/tr><tr><td>3003<\/td><td>~643<\/td><td>Margem confort\u00e1vel \u2014 a liga n\u00facleo padr\u00e3o para CAB<\/td><\/tr><tr><td>6063<\/td><td>~615<\/td><td>Vi\u00e1vel, mas com janela estreita<\/td><\/tr><tr><td>6061<\/td><td>~582<\/td><td><strong>Sem margem \u2014 n\u00e3o brasar<\/strong><\/td><\/tr><tr><td>7075<\/td><td>~477<\/td><td><strong>O metal de adi\u00e7\u00e3o fundiria ap\u00f3s o metal-base<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A linha do 6061 \u00e9 a que pega as pessoas. O 6061 \u00e9 rotineiramente listado como uma liga-base bras\u00e1vel, mas seu solidus \u00e9 582 \u00b0C \u2014 a mesma temperatura do liquidus do 4047. N\u00e3o h\u00e1 janela de processo. Some a isso o teor de magn\u00e9sio do 6061, que complica o controle de fluxo e atmosfera, e a brasagem em forno do 6061 torna-se impratic\u00e1vel. Se a pe\u00e7a \u00e9 6061 e precisa ser unida, especifique soldagem com 4043 ou 5356 em vez de brasagem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Os valores de solidus acima s\u00e3o valores publicados t\u00edpicos. Confirme o valor real para o lote que voc\u00ea est\u00e1 brasando a partir do certificado de usina do metal-base antes de definir um ciclo de forno.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4047 vs 4043 vs 5356<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-filler.webp\" alt=\"4047-filler\" class=\"wp-image-10672\" srcset=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-filler.webp 800w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-filler-300x225.webp 300w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-filler-768x576.webp 768w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-filler-16x12.webp 16w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-filler-600x450.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Enchimento<\/td><td>Sil\u00edcio \/ elementa\u00e7\u00e3o<\/td><td>Comportamento de fus\u00e3o<\/td><td>Escolha-o para<\/td><td>Evite-o para<\/td><\/tr><tr><td><strong><a href=\"https:\/\/premiumalu.com\/pt\/produto\/liga-de-aluminio-4047\/\" data-type=\"product\" data-id=\"8301\">4047<\/a><\/strong><\/td><td>11\u201313% Si<\/td><td>577\u2013582 \u00b0C, zona pastosa de ~5 \u00b0C<\/td><td>Brasagem de folga estreita, trocadores de calor estanques, alum\u00ednio fundido, 6xxx de parede fina<\/td><td>Soldas anodizadas e com correspond\u00eancia de cor; folgas de junta amplas<\/td><\/tr><tr><td><strong><a href=\"https:\/\/premiumalu.com\/pt\/produto\/liga-de-aluminio-4043\/\" data-type=\"product\" data-id=\"8585\">4043<\/a><\/strong><\/td><td>4,5\u20136,0% Si<\/td><td>Aproximadamente 573\u2013630 \u00b0C, ampla faixa pastosa<\/td><td>Soldagem geral de 6xxx, soldas que ser\u00e3o anodizadas<\/td><td>Tight capillary brazing \u2014 too sluggish through the gap<\/td><\/tr><tr><td><strong><a href=\"https:\/\/premiumalu.com\/pt\/produto\/liga-de-aluminio-5356\/\" data-type=\"product\" data-id=\"8837\">5356<\/a><\/strong><\/td><td>4.5\u20135.5% Mg<\/td><td>Higher-melting, no capillary action<\/td><td>Welding 5xxx base metals; marine service<\/td><td>Brazing \u2014 it is a welding filler, not a braze filler<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A short version: 4047 and 4043 compete with each other; 5356 is in a different job. See our <a href=\"https:\/\/premiumalu.com\/pt\/dicas-de-especialistas-para-dominar-o-aluminio-4043\/\">4043 aluminum guide<\/a> for the silicon-filler side and our <a href=\"https:\/\/premiumalu.com\/pt\/guia-definitivo-para-especificacoes-do-aluminio-5356\/\">5356 aluminum guide<\/a> for the magnesium-filler side.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Go \/ No-Go<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Aplic\u00e1vel \u2014 use 4047 quando:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tight-gap brazing with leak-tightness as a requirement: radiator cores, condensers, evaporators, intercoolers, plate heat exchangers.<\/li>\n\n\n\n<li>CAB or vacuum brazing, or torch brazing, with a base metal whose solidus clears 582 \u00b0C by a real margin \u2014 1xxx and 3xxx are the safe families.<\/li>\n\n\n\n<li>Welding cast aluminum, thin-wall 6xxx, or crack-sensitive joints where ER4043 has given trouble.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>No-Go \u2014 escolher outra op\u00e7\u00e3o quando:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The joint will be anodized and must match the base metal colour. Use 4043.<\/li>\n\n\n\n<li>The base metal is 6061 or a 7xxx grade and the process is brazing. There is no solidus margin. Weld instead, with 4043 for 6xxx or 5356 for 5xxx.<\/li>\n\n\n\n<li>The joint gap exceeds about 0.2 mm. The filler will drain before it freezes \u2014 use 4043 or a pre-placed preform sized to the joint.<\/li>\n\n\n\n<li>The base metal is 5xxx and the process is welding. Use 5356.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Aplicativos<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-applications.webp\" alt=\"4047-applications\" class=\"wp-image-10673\" srcset=\"https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-applications.webp 800w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-applications-300x225.webp 300w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-applications-768x576.webp 768w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-applications-16x12.webp 16w, https:\/\/premiumalu.com\/wp-content\/uploads\/2026\/10\/4047-applications-600x450.webp 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Automotivo<\/strong> \u2014 radiator and heater cores, charge-air coolers, air-conditioning condensers and evaporators<\/li>\n\n\n\n<li><strong>HVAC<\/strong> \u2014 aluminum heat exchanger coils, refrigerant circuit joints<\/li>\n\n\n\n<li><strong>Refrigeration<\/strong> \u2014 evaporator and condenser plate assemblies<\/li>\n\n\n\n<li><strong>Aeroespacial<\/strong> \u2014 aluminum heat exchangers, fuel-cooled oil coolers, environmental control system heat exchangers<\/li>\n\n\n\n<li><strong>Cast aluminum repair<\/strong> \u2014 castings and housings, using ER4047 as a welding wire<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclus\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">4047 carries two standards at once: AWS A5.8 BAlSi-4 for brazing and AWS A5.10 ER4047 for TIG and MIG welding. Choose it when the joint is tight, leak-tight, or crack-prone, and choose 4043 when the weld has to be anodized and colour-matched, 5356 when the base metal is 5xxx. The hard limit is the base metal solidus \u2014 if it does not clear 582 \u00b0C with a real margin, brazing is off the table and the joint has to be welded.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We supply <a href=\"https:\/\/premiumalu.com\/pt\/produto\/liga-de-aluminio-4047\/\">4047 brazing and welding wire<\/a>, rod, and foil, with custom diameters and coil weights produced to your specification. Every order ships with an MTC, and custom lead times run 10\u201360 days.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Send us the filler form, diameter, and base metal, and we will confirm availability or a custom production window.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Perguntas frequentes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Can 4047 be supplied as preforms, rings or a specific wire diameter?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. 4047 comes as wire, rod, foil and strip, and preform shapes are produced to your joint geometry. Name the form, the diameter or thickness, and the coil or piece weight, and the item is quoted against that rather than against a catalogue size.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What lead time and minimum order quantity should I expect for 4047 filler?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Low-MOQ runs are supported for non-stock sizes, with typical custom lead times of 10\u201360 days. Standard wire diameters are usually available from stock; foil thickness and preform shapes are made to order.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Can 4047 be used to braze 6061?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No. 4047&#8217;s liquidus and 6061&#8217;s solidus meet at the same 582 \u00b0C under their governing standards. There is no temperature at which the filler flows while 6061 stays solid, so join 6061 by welding with 4043 instead, or move to a 1xxx or 3xxx base metal if brazing is fixed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What documents come with a 4047 order?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A mill test certificate carrying the chemistry and mechanical results for the lot. Where a customer&#8217;s process qualification needs independent evidence, SGS chemical and mechanical reports are available on request at extra cost.<\/p>","protected":false},"excerpt":{"rendered":"<p>4047 is an aluminum-silicon filler alloy carrying 11\u201313% silicon. It is not a structural wrought grade \u2014 you do not build a frame out of it. You buy it to join other aluminum parts, and it does that job in two different processes under two different standards. 4047 is specified in two roles under two [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":10668,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"1. 4047 Aluminum: Brazing Filler and Welding Wire","_seopress_titles_desc":"4047 aluminum holds two standards at once: AWS A5.8 brazing filler and AWS A5.10 welding wire. See the base metal solidus rule that decides where it works.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","footnotes":""},"categories":[185],"tags":[],"class_list":["post-8629","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-4000-series-aluminum"],"_links":{"self":[{"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/posts\/8629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/comments?post=8629"}],"version-history":[{"count":3,"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/posts\/8629\/revisions"}],"predecessor-version":[{"id":10674,"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/posts\/8629\/revisions\/10674"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/media\/10668"}],"wp:attachment":[{"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/media?parent=8629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/categories?post=8629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/premiumalu.com\/pt\/wp-json\/wp\/v2\/tags?post=8629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}