![]() ![]() These alloys still have great flow characteristics and a melting temperature of 610-700º C but can create a small fillet which adds to their strength. Joints requiring fillet welds or where fitments maybe not as tight as joints requiring capillary action use brazing alloys with a 34-45 percent silver content. The fillet size will always be too small to add any strength so consumables with a lower silver base are far better for these fillets and build-up. They are not so suitable for fillet-type brazed joints. They are also ideal for copper alloys including, brasses, bronzes, gunmetal, nickel silvers, aluminum bronze, and copper-nickel. The 50-56 percent silver alloys can be used to join steels that include mild, carbon, tool steel, stainless steels, low alloy steel, and tungsten carbide. The 50-56 percent silver alloys have fantastic capillary action and their molten state flowing characteristics are good for both tight and capillary joints. This will produce a neat joint with optimum strength and offers the highest level of ductility and corrosion resistance.īecause of their excellent flowing characteristics, Easyflo 50 and its namesakes have historically been regarded as among the best silver brazing alloys available. ![]() These alloys are normally used on a tight or narrow joint such as a lap joint where a joint gap of 0.05-0.15mm is ideal. ![]() Trade names like Easyflo 50, Silverflo 55, and Comweld 356T encompass brazing filler metal with 50-56 percent silver content and a melting temperature between 620-630º C. There are not a lot of ancient furnaces, forges, or charcoal fires complete with blowpipes floating around these days. While this filler material has remained in use over the ages, modern heating processes have certainly changed. Such low-temperature brazing has been around for a few thousand years with gold and silver documented as being used to braze goblets and jewellery around 2500BC. This process is often referred to as low-temperature brazing, silver brazing, or silver soldering. Soldering is defined as having a molten liquid temperature below 450º C. Copper plumbing is the best example.īrazing temperatures can be defined as over 450º C, meaning the brazing filler material will become a molten liquid above this temperature. Such brazing alloys are renowned for their capillary action which makes this process excellent for watertight or air-tight joints. The low surface tension of this molten brazing alloy enables the adhesion between the parts of the brazed joint. Copper and brass are perfect for brazing as are steels and stainless steels.īecause the parent materials are not fused, the silver brazing alloy becomes the common joint. Dissimilar metals or base metals can be brazed together. Unlike soldering, brazing creates an extremely strong joint without melting or deforming the parent materials and this joint is usually stronger than the base metal pieces themselves. This filler rod when melted flows into or across the joint and solidifies when cool to form a solid bond. Brazing can be described as the joining of two or more pieces of base metals together using a copper or silver-based filler rod. ![]()
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