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Brazing Methods Brazing methods range from torch brazing in open air to vacuum furnace brazing. Torch and induction brazing are the most common, using an Ag-Cu-Zn alloy to form joints. Oxides form on surfaces of base metals in open air, prohibiting the filler metal from wetting the assembly ...

Lucas-Milhaupt Global Brazing Solutions would like to introduce our new Sil-Fos 15 Rings designed for brazing copper tubular components for HVAC/R installation applications. The Sil-Fos rings use a calculated alloy volume for use with standard size copper tube from 1/4 inch to 1-1/8 inch. The ...

Flux Defined Flux, according to the American Welding Society (AWS), is "a material used to hinder or prevent the formation of oxides and other undesirable substances in molten metal and on solid-metal surfaces, and to dissolve or otherwise facilitate the removal of such substances." In other words, ...

What's the Difference? Welding joins base metals by melting and fusing them, usually adding a filler material. Fusion requires concentrated heat directly at the joint, and temperatures must exceed the melting point of the metals and filler. Welded joints are usually as strong as, or stronger than, ...

There are six fundamentals of brazing that every brazer should follow to ensure consistent and repeatable joint quality, strength, hermeticity, and reliability. We went over the first three in our previous blog post; here are the last three in detail: 4. Assemble for Brazing with Proper Fixturing ...

There are six fundamentals of brazing that every brazer should follow to ensure consistent and repeatable joint quality, strength, hermeticity, and reliability. The six fundamentals are: 1. Good Fit and Proper Clearance In everyday brazing, clearances are typically 0.001 to 0.005 in. radially to ...

Copper-to-Aluminum Joint Integrity HVAC manufacturers evaluating the use of aluminum components need to consider the best method for joining parts-such as evaporator and condenser coils-to secondary copper lines or assemblies. Several joining methods can be used, including: adhesives, mechanical ...

HVAC Trends The global HVAC/R market continues to grow, as the world population migrates to warmer regions and as a growing middle class (especially in developing countries) demands cooling comfort. In addition, legislation has forced changes within the industry: ozone-depleting refrigerants are ...

SELECTING THE BRAZING PREFORM In setting down the various preforms available, we may be guilty of too much detail. At the same time, we do want you to have a complete selection. We will go through the variations with illustrations alongside. MACHINE WOUND RINGS Ring machines are essentially spring ...

From bicycles to electronics -- whatever your products may be -- they can benefit from the accuracy and purity of Lucas-Milhaupt braze preforms. Economy in use is gained by getting the correct size and shape for your application. An edgewound washer, an arc ring, a stress relieved ring -- whatever ...