{"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":"mastering-4047-hlinik-expertni-tipy-a-techniky","status":"publish","type":"post","link":"https:\/\/premiumalu.com\/cs\/mastering-4047-aluminum-expert-tips-and-techniques\/","title":{"rendered":"Hlin\u00edk 4047: P\u00e1jec\u00ed plnivo a sva\u0159ovac\u00ed dr\u00e1t v jedn\u00e9 slitin\u011b"},"content":{"rendered":"<p class=\"wp-block-paragraph\">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.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4047 is specified in two roles under two different standards \u2014 AWS A5.8 BAlSi-4 as a brazing filler, AWS A5.10 ER4047 as a welding wire. Name the role on the enquiry, because the form, the process and the paperwork all follow from it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One limit decides whether it works at all: the solidus temperature of the base metal you are joining.<\/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 obal\" 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\">Two Standards, One Alloy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The same 4047 composition is registered under two AWS specifications, and the one that applies depends on the process, not on the alloy:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Standardn\u00ed<\/td><td>Ozna\u010den\u00ed<\/td><td>Proces<\/td><td>Typick\u00e1 forma<\/td><\/tr><tr><td>AWS A5.8 \/ A5.8M<\/td><td>BAlSi-4<\/td><td>Brazing<\/td><td>Foil, strip, preforms, paste, clad layer on brazing sheet<\/td><\/tr><tr><td>AWS A5.10 \/ A5.10M<\/td><td>ER4047<\/td><td>GTAW (TIG) and GMAW (MIG) welding<\/td><td>Spooled or cut-length wire, rod<\/td><\/tr><tr><td>AMS 4185<\/td><td>\u2014<\/td><td>Aerospace filler<\/td><td>Wire, rod<\/td><\/tr><tr><td>ISO 17672<\/td><td>Al 112<\/td><td>Brazing<\/td><td>As above<\/td><\/tr><tr><td>GB\/T 13815<\/td><td>BAl88Si<\/td><td>Brazing<\/td><td>As above<\/td><\/tr><tr><td>CS<\/td><td>EN AW-4047<\/td><td>Ob\u011b slitiny<\/td><td>As above<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A filler sold as &#8220;4047 wire&#8221; for TIG welding and a filler sold as &#8220;4047 foil&#8221; for furnace brazing are the same alloy in different forms. What changes is the process, the joint gap, and the temperature the assembly sees.<\/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\">This is worth stating plainly because the opposite claim circulates widely: <strong>4047 can be used for TIG and MIG welding.<\/strong> ER4047 is a listed classification in AWS A5.10, and it is a normal choice for cast aluminum repair, thin-wall 6xxx work, and heat-exchanger tubing. It is not the default filler for every 6xxx weld \u2014 that is ER4043 \u2014 but &#8220;4047 is a brazing filler and cannot be welded with&#8221; is incorrect.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Chemick\u00e9 slo\u017een\u00ed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Silicon near the Al-Si eutectic point is the whole design. Iron, copper, manganese, magnesium, and zinc are capped impurities rather than deliberate additions:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Prvek<\/td><td>Obsah (%)<\/td><td>Role<\/td><\/tr><tr><td>K\u0159em\u00edk (Si)<\/td><td>11.0\u201313.0<\/td><td>Eutectic former \u2014 drives melting point and fluidity<\/td><\/tr><tr><td>\u017delezo (Fe)<\/td><td>\u2264 0,8<\/td><td>Ne\u010distota<\/td><\/tr><tr><td>M\u011b\u010f (Cu)<\/td><td>\u2264 0,30<\/td><td>Ne\u010distota<\/td><\/tr><tr><td>Mangan (Mn)<\/td><td>\u2264 0.15<\/td><td>Ne\u010distota<\/td><\/tr><tr><td>Ho\u0159\u010d\u00edk (Mg)<\/td><td>\u2264 0,10<\/td><td>Impurity, kept low for furnace brazing<\/td><\/tr><tr><td>Zinek (Zn)<\/td><td>\u2264 0,20<\/td><td>Ne\u010distota<\/td><\/tr><tr><td>Beryllium (Be)<\/td><td>\u2264 0.0003<\/td><td>Limit applied under the welding-wire classification<\/td><\/tr><tr><td>Ostatn\u00ed, ka\u017ed\u00fd \/ celkem<\/td><td>\u2264 0.05 \/ \u2264 0.15<\/td><td>Ne\u010distota<\/td><\/tr><tr><td>Hlin\u00edk (Al)<\/td><td>Zbytek<\/td><td>Matrix<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Magnesium is held to 0.10% for a reason. Furnace and controlled-atmosphere brazing depends on the filler staying clean; magnesium in the filler complicates flux and atmosphere control. Keep that cap in mind when a supplier offers a &#8220;4047-type&#8221; alloy with a looser magnesium limit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4047 is non-heat-treatable. There is no precipitation-hardening response to exploit, so no post-braze or post-weld aging will raise its strength.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why the Near-Eutectic Composition Matters<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Three properties follow directly from the silicon content, and all three are the reason 4047 exists:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Melting range.<\/strong> Solidus 577 \u00b0C, liquidus 582 \u00b0C \u2014 a mushy zone of roughly 5 \u00b0C. Published data sheets give 1070\u20131080 \u00b0F (577\u2013582 \u00b0C) as the melting range.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Freezing behaviour.<\/strong> Because the alloy sits almost on the eutectic composition, it goes from fully liquid to fully solid within a few degrees. There is no long pasty stage, which is what suppresses hot cracking in the joint.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fluidity.<\/strong> The low-melting, low-viscosity liquid wicks into capillary gaps, which is what makes leak-tight brazed joints possible in heat exchangers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Compare that with 4043 (4.5\u20136.0% Si). Its solidus sits in the same neighbourhood but its liquidus is far higher, giving a wide pasty range. As a welding wire that is fine. As a brazing filler for tight, leak-tight joints it is not \u2014 the filler spends too long semi-solid to penetrate a narrow gap cleanly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4047 as a Brazing Filler<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is 4047&#8217;s primary application and the reason it was developed.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Processes.<\/strong> Controlled-atmosphere brazing (CAB), vacuum brazing, and torch brazing.<\/li>\n\n\n\n<li><strong>Typical brazing temperature.<\/strong> Around 580\u2013605 \u00b0C. Published shop practice puts the peak in that band, with the upper end avoided to protect thin base-metal sections.<\/li>\n\n\n\n<li><strong>Joint gap.<\/strong> Roughly 0.05\u20130.20 mm. Below that, capillary flow still works; above it, the filler is fluid enough to drain out of the joint before it freezes.<\/li>\n\n\n\n<li><strong>Forms.<\/strong> Foil and strip, preforms and rings, paste, and the clad layer on multilayer brazing sheet.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Typical brazed assemblies: automotive radiator and heater cores, charge-air coolers, HVAC condenser and evaporator joints, refrigeration plate assemblies, and aerospace heat exchangers and fuel-cooled oil coolers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">One expectation to correct: AWS A5.8 classifies the <em>filler<\/em> \u2014 its chemistry and melting behaviour. It does not assign a brazed joint strength. Joint strength comes from the base metal, the joint design, the gap, and the thermal cycle. If a project needs a qualified number, it has to come from testing the actual joint, not from the filler classification.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4047 as a Welding Wire (ER4047)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Under AWS A5.10, the same alloy runs as ER4047 for GTAW and GMAW.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Where it is a good choice:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cast aluminum repair and casting alloys such as A356 \u2014 the high silicon matches the base metal and reduces porosity.<\/li>\n\n\n\n<li>Thin-wall and heat-sensitive assemblies, where the lower liquidus reduces distortion.<\/li>\n\n\n\n<li>Crack-sensitive 6xxx joints, where the narrow freezing range works in your favour.<\/li>\n\n\n\n<li>Heat exchangers, condensers, air-conditioning tubing, and radiator work \u2014 the same capillary behaviour that makes it a good braze filler helps it wet a tight fit-up.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Where 4043 beats it:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Any joint that will be anodized and colour-matched. High-silicon weld metal anodizes to a gray-black that does not match the base metal; 4043 gives a far closer match.<\/li>\n\n\n\n<li>General-purpose 6xxx welding where crack sensitivity is not the driving concern. ER4043 is the default filler for 6061 for most shops, and it is usually cheaper and more widely stocked.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Where neither belongs:<\/strong> welding 5xxx base metals. Use 5356 there (see the comparison below).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Base Metal Solidus Rule<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is the check that decides most 4047 jobs, and it is the one most often skipped.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A brazing filler has to be fully liquid while the base metal is still fully solid. That means the base metal&#8217;s <strong>solidus<\/strong> must sit above the filler&#8217;s <strong>liquidus<\/strong> (582 \u00b0C for 4047) with a working margin, not just a few degrees above it. In practice, aim for a margin of at least 25\u201330 \u00b0C.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Nobelmetal<\/td><td>Solidus (\u00b0C, typical published)<\/td><td>Brazing with 4047<\/td><\/tr><tr><td>1100<\/td><td>~646<\/td><td>Comfortable margin<\/td><\/tr><tr><td>3003<\/td><td>~643<\/td><td>Comfortable margin \u2014 the standard CAB core alloy<\/td><\/tr><tr><td>6063<\/td><td>~615<\/td><td>Workable, but a narrow window<\/td><\/tr><tr><td>6061<\/td><td>~582<\/td><td><strong>No margin \u2014 do not braze<\/strong><\/td><\/tr><tr><td>7075<\/td><td>~477<\/td><td><strong>Filler would melt after the base metal<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The 6061 row is the one that catches people. 6061 is routinely listed as a brazeable base alloy, but its solidus is 582 \u00b0C \u2014 the same temperature as 4047&#8217;s liquidus. There is no process window. Add 6061&#8217;s magnesium content, which complicates flux and atmosphere control, and furnace brazing 6061 becomes impractical. If the part is 6061 and it needs to be joined, specify welding with 4043 or 5356 rather than brazing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Solidus figures above are typical published values. Confirm the actual figure for the lot you are brazing from the base metal&#8217;s mill certificate before setting a furnace cycle.<\/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>V\u00fdpl\u0148<\/td><td>Silicon \/ alloying<\/td><td>Melting behaviour<\/td><td>Pick it for<\/td><td>Avoid it for<\/td><\/tr><tr><td><strong><a href=\"https:\/\/premiumalu.com\/cs\/produkt\/slitina-hliniku-4047\/\" data-type=\"product\" data-id=\"8301\">4047<\/a><\/strong><\/td><td>11\u201313% Si<\/td><td>577\u2013582 \u00b0C, ~5 \u00b0C mushy zone<\/td><td>Tight-gap brazing, leak-tight heat exchangers, cast aluminum, thin-wall 6xxx<\/td><td>Anodized and colour-matched welds; wide joint gaps<\/td><\/tr><tr><td><strong><a href=\"https:\/\/premiumalu.com\/cs\/produkt\/slitina-hliniku-4043\/\" data-type=\"product\" data-id=\"8585\">4043<\/a><\/strong><\/td><td>4.5\u20136.0% Si<\/td><td>Roughly 573\u2013630 \u00b0C, wide pasty range<\/td><td>General 6xxx welding, welds that will be anodized<\/td><td>Tight capillary brazing \u2014 too sluggish through the gap<\/td><\/tr><tr><td><strong><a href=\"https:\/\/premiumalu.com\/cs\/produkt\/slitina-hliniku-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\/cs\/tipy-odborniku-pro-zvladnuti-hliniku-4043\/\">4043 aluminum guide<\/a> for the silicon-filler side and our <a href=\"https:\/\/premiumalu.com\/cs\/konecny-pruvodce-specifikacemi-hliniku-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>Pou\u017e\u00edt \u2014 pou\u017eijte 4047, kdy\u017e:<\/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 zvolte n\u011bco jin\u00e9ho, kdy\u017e:<\/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\">Aplikace<\/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>Automobilov\u00fd pr\u016fmysl<\/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>Letectv\u00ed a kosmonautika<\/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\">Z\u00e1v\u011br<\/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\/cs\/produkt\/slitina-hliniku-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\">\u010casto kladen\u00e9 ot\u00e1zky<\/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\/cs\/wp-json\/wp\/v2\/posts\/8629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/comments?post=8629"}],"version-history":[{"count":3,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/posts\/8629\/revisions"}],"predecessor-version":[{"id":10674,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/posts\/8629\/revisions\/10674"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/media\/10668"}],"wp:attachment":[{"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/media?parent=8629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/categories?post=8629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/premiumalu.com\/cs\/wp-json\/wp\/v2\/tags?post=8629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}