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Once you have properly brazed the assembly, you will need to clean the brazed joint. Cleaning a braze joint is a two step process. The first step is to remove all flux residues. Second, pickle the joint to remove any oxide scale formed during the brazing process. Step 1: Flux Removal Flux removal ...

Because of tolerances, aesthetics or joint design, you sometimes need the flow of braze alloy to be restricted-to stop its flow or keep it off a surface. Capillary dams are often designed into these parts to limit braze alloy flow. A capillary dam is when the clearance is increased to a point where ...

Depending on your brazing process, you may need to perform post-braze joint cleaning to remove residual flux. This step can be crucial since most fluxes are corrosive. Post-braze cleaning is one of the Six Fundamentals of Brazing*. Reasons to Remove Flux Let's examine five reasons why post-braze ...

Radiographic Examination - Discontinuity Images on Film Examining finished joints may be the final step in the brazing process, but inspection procedures should be incorporated into the design stage. Your methodology will depend on the application, service and end-user requirements plus regulatory ...

Liquid Metal Embrittlement Liquid Metal Embrittlement (LME) may occur in a brazing operation involving high-strength materials such as stainless steels, nickel alloys or age-hardened alloys, when the materials are stressed and come into contact with molten brazing filler metal. Many cases have been ...

Lucas-Milhaupt Warranty vs. Shelf Life Many times each year, customers ask our Technical Services Group, "What is the shelf life of your formulated products?" In most cases, Lucas-Milhaupt does not provide a shelf life, but rather a warranty. Please note that warranties do not mean that the product ...

Flux is a chemical compound applied to joint surfaces before brazing. The addition of metallic boron changes white flux to black. This new video clip will show you the difference between these materials. We will also demonstrate several uses for black flux. For example, in a high-temperature ...

The Right Flux for the Job High-temperature fluxes are used with brazing filler materials having melting temperatures of 1600°F (870°C) - 2000°F (1100°C), or 2200°F (1205°C) for boron-modified filler. These fluxes are useful for applications where higher-temperature alloys are needed for strength, ...

Flux is a chemical compound applied to the joint surfaces before brazing. Watch our new technical video for an in-depth look at the four functions of flux: 1. Protect from oxygen 2. Dissolve & absorb oxides 3. Help filler flow 4. Indicate temperature Then, we'll show you how Handy® Flux appears ...

How Stop-Off Works To understanding how Stop-Off works, let's review the brazing process. At Lucas Milhaupt, we preach six fundamentals of brazing: 1. Good fit & clearance 2. Clean metals 3. Uniform fluxing 4. Proper assembly 5. Brazing technique 6. Post-braze cleaning Let's focus on Step 2 - ...