{"id":9281,"date":"2026-03-01T01:16:48","date_gmt":"2026-03-01T01:16:48","guid":{"rendered":"http:\/\/sxwelding.com\/?post_type=product&#038;p=9281"},"modified":"2026-04-16T01:57:47","modified_gmt":"2026-04-16T01:57:47","slug":"non-copper-coated-welding-wire","status":"publish","type":"product","link":"https:\/\/sxwelding.com\/fr\/produit\/fil-de-soudage-non-revetu-de-cuivre\/","title":{"rendered":"Fil de soudure non rev\u00eatu de cuivre"},"content":{"rendered":"<p data-start=\"135\" data-end=\"454\">Le fil de soudage sans cuivre est un mat\u00e9riau de soudage de pointe con\u00e7u pour \u00e9liminer totalement toute contamination par le cuivre, tant au cours du processus de fabrication que lors de son utilisation. Gr\u00e2ce \u00e0 une technologie sp\u00e9ciale d'activation de surface, ce fil pr\u00e9sente une finition lisse, d'excellentes propri\u00e9t\u00e9s antirouille et une conductivit\u00e9 \u00e9lectrique sup\u00e9rieure.<\/p>\n<p data-start=\"456\" data-end=\"612\">Cela garantit une alimentation stable en fil, un arc \u00e9lectrique constant et une qualit\u00e9 de soudage fiable, ce qui en fait la solution id\u00e9ale pour les op\u00e9rations de soudage en continu de longue dur\u00e9e.<\/p>\n<table>\n<tbody>\n<tr class=\"firstRow\">\n<td colspan=\"15\" valign=\"top\" width=\"627\"><strong>Composition chimique de l'ER50-6(%)<\/strong><\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"47\"><strong>\u00e9l\u00e9ment<\/strong><\/td>\n<td colspan=\"2\" valign=\"top\" width=\"53\"><strong>C<\/strong><\/td>\n<td valign=\"top\" width=\"55\"><strong>S<\/strong><\/td>\n<td colspan=\"2\" valign=\"top\" width=\"59\"><strong>Mn<\/strong><\/td>\n<td valign=\"top\" width=\"59\"><strong>Si<\/strong><\/td>\n<td valign=\"top\" width=\"59\"><strong>P<\/strong><\/td>\n<td colspan=\"2\" valign=\"top\" width=\"59\"><strong>Cr<\/strong><\/td>\n<td valign=\"top\" width=\"59\"><strong>Ni<\/strong><\/td>\n<td colspan=\"2\" valign=\"top\" width=\"59\"><strong>Mo<\/strong><\/td>\n<td valign=\"top\" width=\"59\"><strong>Cu<\/strong><\/td>\n<td valign=\"top\" width=\"60\"><strong>V<\/strong><\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"47\">standard<\/td>\n<td colspan=\"2\" valign=\"top\" width=\"53\">0.06-0.14<\/td>\n<td valign=\"top\" width=\"55\">\u22640.025<\/td>\n<td colspan=\"2\" valign=\"top\" width=\"59\">1.40-1.85<\/td>\n<td valign=\"top\" width=\"59\">0.80-1.15<\/td>\n<td valign=\"top\" width=\"59\">\u22640.025<\/td>\n<td colspan=\"2\" valign=\"top\" width=\"59\">\u22640.015<\/td>\n<td valign=\"top\" width=\"59\">\u22640.015<\/td>\n<td colspan=\"2\" valign=\"top\" width=\"59\">\u22640.015<\/td>\n<td valign=\"top\" width=\"59\">\u22640.35<\/td>\n<td valign=\"top\" width=\"60\">\u22640.03<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"47\">Exemple de valeur<\/td>\n<td colspan=\"2\" valign=\"top\" width=\"53\">0.075<\/td>\n<td valign=\"top\" width=\"55\">0.017<\/td>\n<td colspan=\"2\" valign=\"top\" width=\"59\">1.48<\/td>\n<td valign=\"top\" width=\"59\">0.87<\/td>\n<td valign=\"top\" width=\"59\">0.016<\/td>\n<td colspan=\"2\" valign=\"top\" width=\"59\">0.026<\/td>\n<td valign=\"top\" width=\"59\">0.013<\/td>\n<td colspan=\"2\" valign=\"top\" width=\"59\">0.015<\/td>\n<td valign=\"top\" width=\"59\">0.12<\/td>\n<td valign=\"top\" width=\"60\">0.01<\/td>\n<\/tr>\n<tr>\n<td colspan=\"15\" valign=\"top\" width=\"627\"><strong>Propri\u00e9t\u00e9s m\u00e9caniques du m\u00e9tal d\u00e9pos\u00e9<\/strong><\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" valign=\"top\" width=\"79\"><strong>Projet exp\u00e9rimental<\/strong><\/td>\n<td colspan=\"3\" valign=\"top\" width=\"131\"><strong>R\u00e9sistance  Rm (MPa)<\/strong><\/td>\n<td colspan=\"4\" valign=\"top\" width=\"144\"><strong>Limite d'\u00e9lasticit\u00e9 Rm (MPa)<\/strong><\/td>\n<td colspan=\"3\" valign=\"top\" width=\"116\"><strong>allongement  A (%)<\/strong><\/td>\n<td colspan=\"3\" valign=\"top\" width=\"157\"><strong>Essai de choc de type V (J) \u00e0 -30 \u00b0C<\/strong><\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" valign=\"top\" width=\"79\">standard<\/td>\n<td colspan=\"3\" valign=\"top\" width=\"131\">\u2265500<\/td>\n<td colspan=\"4\" valign=\"top\" width=\"144\">\u2265420<\/td>\n<td colspan=\"3\" valign=\"top\" width=\"116\">\u226522<\/td>\n<td colspan=\"3\" valign=\"top\" width=\"157\">\u226527<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" valign=\"top\" width=\"79\">Exemple de valeur<\/td>\n<td colspan=\"3\" valign=\"top\" width=\"131\">553<\/td>\n<td colspan=\"4\" valign=\"top\" width=\"144\">458<\/td>\n<td colspan=\"3\" valign=\"top\" width=\"116\">32<\/td>\n<td colspan=\"3\" valign=\"top\" width=\"157\">91<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div id='gallery-1' class='gallery galleryid-9281 gallery-columns-3 gallery-size-full'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/sxwelding.com\/fr\/?attachment_id=9287'><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311480742930.jpg\" class=\"attachment-full size-full\" alt=\"\" srcset=\"https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311480742930.jpg 800w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311480742930-300x225.jpg 300w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311480742930-768x576.jpg 768w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311480742930-16x12.jpg 16w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311480742930-600x450.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/sxwelding.com\/fr\/?attachment_id=9288'><img decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311526203421.jpg\" class=\"attachment-full size-full\" alt=\"\" srcset=\"https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311526203421.jpg 800w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311526203421-300x225.jpg 300w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311526203421-600x450.jpg 600w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311526203421-768x576.jpg 768w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311526203421-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/sxwelding.com\/fr\/?attachment_id=9289'><img decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311536923533.jpg\" class=\"attachment-full size-full\" alt=\"\" srcset=\"https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311536923533.jpg 800w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311536923533-300x225.jpg 300w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311536923533-600x450.jpg 600w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311536923533-768x576.jpg 768w, https:\/\/sxwelding.com\/wp-content\/uploads\/2026\/03\/1745311536923533-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n\n\t\t<div data-elementor-type=\"container\" data-elementor-id=\"9430\" class=\"elementor elementor-9430\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t<div class=\"elementor-element elementor-element-70aac977 e-flex e-con-boxed e-con e-parent\" data-id=\"70aac977\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7240c1f9 elementor-widget elementor-widget-heading\" data-id=\"7240c1f9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Description<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5685a292 e-con-full e-flex e-con e-child\" data-id=\"5685a292\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-18eb16e3 e-grid e-con-full e-con e-child\" data-id=\"18eb16e3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-71d95ce3 e-con-full e-flex e-con e-child\" data-id=\"71d95ce3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5fdd70e1 elementor-widget elementor-widget-heading\" data-id=\"5fdd70e1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Caract\u00e9ristiques principales<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5e5190a9 elementor-widget elementor-widget-text-editor\" data-id=\"5e5190a9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul data-start=\"640\" data-end=\"1331\"><li data-section-id=\"12li4s\" data-start=\"640\" data-end=\"769\"><strong data-start=\"642\" data-end=\"663\">Sans rev\u00eatement en cuivre<\/strong><br data-start=\"663\" data-end=\"666\" \/>\u00c9limine la pollution par le cuivre, ce qui rend les syst\u00e8mes de soudage plus respectueux de l'environnement et plus propres.<\/li><li data-section-id=\"vcjy6b\" data-start=\"771\" data-end=\"891\"><strong data-start=\"773\" data-end=\"815\">Technologie avanc\u00e9e d'activation de surface<\/strong><br data-start=\"815\" data-end=\"818\" \/>Surface lisse, r\u00e9sistance accrue \u00e0 la corrosion et durabilit\u00e9 am\u00e9lior\u00e9e.<\/li><li data-section-id=\"1jz369d\" data-start=\"893\" data-end=\"1000\"><strong data-start=\"895\" data-end=\"932\">Excellente conductivit\u00e9 \u00e9lectrique<\/strong><br data-start=\"932\" data-end=\"935\" \/>Garantit un allumage stable de l'arc et des performances de soudage constantes.<\/li><li data-section-id=\"23hz25\" data-start=\"1002\" data-end=\"1106\"><strong data-start=\"1004\" data-end=\"1027\">Alimentation stable en fil de fer<\/strong><br data-start=\"1027\" data-end=\"1030\" \/>R\u00e9duit la r\u00e9sistance d'avance ; convient au soudage \u00e0 grande vitesse et automatis\u00e9.<\/li><li data-section-id=\"1oaffc5\" data-start=\"1108\" data-end=\"1217\"><strong data-start=\"1110\" data-end=\"1148\">Faibles projections et bel aspect de la soudure<\/strong><br data-start=\"1148\" data-end=\"1151\" \/>Permet d'obtenir des cordons de soudure nets ne n\u00e9cessitant qu'un traitement minimal apr\u00e8s soudage.<\/li><li data-section-id=\"1xwj9lb\" data-start=\"1219\" data-end=\"1331\"><strong data-start=\"1221\" data-end=\"1263\">Haute efficacit\u00e9 pour le soudage en continu<\/strong><br data-start=\"1263\" data-end=\"1266\" \/>Id\u00e9al pour les longues journ\u00e9es de travail et les applications \u00e0 grande \u00e9chelle.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4db891b9 e-con-full e-flex e-con e-child\" data-id=\"4db891b9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4be9901c elementor-widget elementor-widget-heading\" data-id=\"4be9901c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Performance technique<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6682860f elementor-widget elementor-widget-text-editor\" data-id=\"6682860f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul data-start=\"2262\" data-end=\"2394\">\n \t<li data-section-id=\"80n4ue\" data-start=\"2262\" data-end=\"2302\">Arc stable et transfert de m\u00e9tal r\u00e9gulier<\/li>\n \t<li data-section-id=\"zfa6ys\" data-start=\"2303\" data-end=\"2331\">Faible sensibilit\u00e9 \u00e0 la porosit\u00e9<\/li>\n \t<li data-section-id=\"1vf3tgp\" data-start=\"2332\" data-end=\"2362\">Rendement de d\u00e9p\u00f4t \u00e9lev\u00e9<\/li>\n \t<li data-section-id=\"k7cmlb\" data-start=\"2363\" data-end=\"2394\">Formation uniforme du cordon de soudure<\/li>\n<\/ul>\nLes essais montrent que les propri\u00e9t\u00e9s m\u00e9caniques du fil \u00e0 souder sans cuivre, telles que la r\u00e9sistance \u00e0 la traction de la soudure et l'\u00e9nergie d'absorption des chocs, sont comparables \u00e0 celles du fil \u00e0 souder plaqu\u00e9 cuivre, voire sup\u00e9rieures dans certaines conditions (comme la r\u00e9sistance aux chocs \u00e0 basse temp\u00e9rature), ce qui permet de r\u00e9pondre aux exigences de soudage de l'acier \u00e0 haute r\u00e9sistance.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-33f9f378 e-con-full e-flex e-con e-child\" data-id=\"33f9f378\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2a26c6a1 elementor-widget elementor-widget-heading\" data-id=\"2a26c6a1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Applications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f0f7fdf elementor-widget elementor-widget-text-editor\" data-id=\"1f0f7fdf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"1359\" data-end=\"1432\">Le fil de soudage sans cuivre est largement utilis\u00e9 dans divers secteurs, notamment :<\/p><ul data-start=\"1434\" data-end=\"1616\"><li data-section-id=\"unide5\" data-start=\"1434\" data-end=\"1459\">Machines pour l'exploitation du charbon<\/li><li data-section-id=\"19d9gij\" data-start=\"1460\" data-end=\"1486\">Engins de chantier<\/li><li data-section-id=\"x6kl1i\" data-start=\"1487\" data-end=\"1512\">Industrie de la construction navale<\/li><li data-section-id=\"su4pla\" data-start=\"1513\" data-end=\"1535\">Ing\u00e9nierie des ponts<\/li><li data-section-id=\"1hf4m10\" data-start=\"1536\" data-end=\"1556\">R\u00e9cipients sous pression<\/li><li data-section-id=\"14x245y\" data-start=\"1557\" data-end=\"1588\">Fabrication de structures en acier<\/li><li data-section-id=\"c82j21\" data-start=\"1589\" data-end=\"1616\">Mise en place d'infrastructures<\/li><\/ul><p data-start=\"1618\" data-end=\"1642\">Il convient \u00e9galement pour :<\/p><ul data-start=\"1643\" data-end=\"1756\"><li data-section-id=\"ttcr13\" data-start=\"1643\" data-end=\"1670\">Soudage de l'acier faiblement alli\u00e9<\/li><li data-section-id=\"3me6md\" data-start=\"1671\" data-end=\"1693\">Soudage de t\u00f4les minces<\/li><li data-section-id=\"prsm3f\" data-start=\"1694\" data-end=\"1720\">Soudage de l'acier pour conduites<\/li><li data-section-id=\"p9rif3\" data-start=\"1721\" data-end=\"1756\">Applications de soudage \u00e0 grande vitesse<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5bb4d65e e-con-full e-flex e-con e-child\" data-id=\"5bb4d65e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3c65a2b6 elementor-widget elementor-widget-heading\" data-id=\"3c65a2b6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Avantages du produit<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2ea5f744 elementor-widget elementor-widget-text-editor\" data-id=\"2ea5f744\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul data-start=\"1790\" data-end=\"2225\"><li data-section-id=\"dyr4bi\" data-start=\"1790\" data-end=\"1901\">Stabilit\u00e9 de soudage am\u00e9lior\u00e9e : le rev\u00eatement de surface du fil de soudage sans cuivre contient des composants actifs qui am\u00e9liorent la stabilit\u00e9 de l'arc, affinent les gouttelettes de m\u00e9tal fondu et r\u00e9duisent les projections. Un traitement sp\u00e9cial permet de contr\u00f4ler les projections et d'assurer la stabilit\u00e9 de l'arc.<\/li><li data-section-id=\"qcoaro\" data-start=\"1903\" data-end=\"2021\">R\u00e9sistance accrue \u00e0 la corrosion : certaines technologies de traitement de surface des fils de soudage sans cuivre allient pr\u00e9vention de la rouille et r\u00e9sistance \u00e0 la corrosion, ce qui prolonge la dur\u00e9e de conservation du fil, en particulier dans les environnements humides.<\/li><li data-section-id=\"2riw35\" data-start=\"2023\" data-end=\"2125\">Large champ d'application : le fil de soudage sans cuivre pr\u00e9sente une bonne adaptabilit\u00e9 au soudage sous protection de CO\u2082 et au soudage sous protection de gaz mixtes (tels que l'argon et le CO\u2082), et convient au soudage de divers aciers (tels que le Q345B, l'acier \u00e0 faible teneur en carbone, etc.).<\/li><li data-section-id=\"1y0ezdm\" data-start=\"2127\" data-end=\"2225\">S\u00e9curit\u00e9 op\u00e9rationnelle : le fil de soudage sans cuivre ne contient pas de couche de cuivre ; il ne d\u00e9gage donc ni fum\u00e9es de cuivre ni gaz nocifs pendant le soudage, ce qui r\u00e9duit les risques pour la sant\u00e9 des op\u00e9rateurs. Il est particuli\u00e8rement adapt\u00e9 aux environnements de travail clos ou mal ventil\u00e9s.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Le fil de soudure sans cuivre est un mat\u00e9riau avanc\u00e9 qui \u00e9limine la contamination par le cuivre pendant la production et l'utilisation. Gr\u00e2ce \u00e0 une technologie sp\u00e9ciale d'activation de la surface, il offre une finition lisse, de bonnes performances antirouille et une excellente conductivit\u00e9 \u00e9lectrique.<\/p>","protected":false},"featured_media":9614,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Copper-Free Welding Wire Manufacturer | Non Copper Coated Welding Wire Supplier","_seopress_titles_desc":"High-quality copper-free welding wire with no copper contamination, excellent conductivity, and stable feeding. 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