Copper Tubing Braze Alloy Usage Calculator

Posted by Lucas-Milhaupt Brazing Experts on Apr 6, 2016
  The new Lucas-Milhaupt® calculator makes it easy and convenient to estimate the amount of braze alloy or solder alloy required for plumbing or HVACR applications. How can you use this online tool? Increase accuracy of estimating the amount of alloy you need-in readily available sizes-for common ...
Read More

Topics: HVAC/R, Copper

What Can Lucas-Milhaupt Technical Services Do for You?

Posted by Lucas-Milhaupt Brazing Experts on Feb 29, 2016
Companies are facing tremendous economic pressure today, which requires renewed focus on core business practices. Your goals may include increasing workforce skills, improving manufacturing processes and building more robust products while reducing costs associated with labor, field failure and ...
Read More

Topics: Brazing Tips

Brazing Components for Refrigeration

Posted by Lucas-Milhaupt Brazing Experts on Sep 24, 2015
Brazing Components for Refrigeration Today, we address correct brazing alloys as well as proper brazing methods for refrigeration components. Our main topics are: Alloy selection Gas and torch selection Brazing method Nitrogen purge System evacuation and charge Remember, brazing in the HVAC/R ...
Read More

Topics: HVAC/R, Copper, Steel, Aluminum, Torch

Brazing for the Refrigeration Cycle

Posted by Kendra Pilon on Aug 3, 2015
Refrigeration is the transfer of heat from a lower temperature region to a higher temperature region. The most common refrigeration cycle-used in home refrigerators-is the vapor-compression refrigeration cycle. This cycle has four components, as seen in Figure 1:  Compressor Condenser Coil ...
Read More

Torch Brazing with Pre-formed Rings vs. Hand-fed Rods

Posted by Lucas-Milhaupt Brazing Experts on Jul 1, 2015
Lucas-Milhaupt performed a study on the performance of braze filler metal rings against the performance of hand-fed filler metal rods. We used three heating, ventilating, air conditioning and refrigeration (HVAC/R) industry-standard tube sizes. Five trained and certified technicians helped ...
Read More

Topics: HVAC/R, Torch

De-alloying or Selective Attack in Brazing

Posted by Lucas-Milhaupt Brazing Experts on Apr 24, 2015
What is dezincification? First, we must understand dealloying-a type of corrosion involving selective leaching or removal of one element or phase with in the material. This selectively removed phase or element from an alloy, leaves behind a porous, spongy mass. Dezincification is a form of ...
Read More

Aluminum Brazing: Corrosive or Non-Corrosive Flux

Posted by Lucas-Milhaupt Brazing Experts on Mar 24, 2015
Aluminum brazing has become prevalent in the automotive and HVAC/R industries. Most manufacturers are using all-aluminum or mostly aluminum components, including evaporator and condenser coils, distributors, liquid and suction lines. When brazing aluminum, two families of fluxes are commercially ...
Read More

Topics: Copper, Nickel, Aluminum, Torch

The Effect of Joint Clearance on Braze Joint Strength

Posted by Mariana Ruiz on Feb 25, 2015
Brazing uses the principle of capillary action to distribute molten filler metal between the surfaces of base metals being joined. Therefore, during the brazing operation, take care to maintain a proper clearance between the base metals to allow capillary action to work effectively. In most cases, ...
Read More

Step Brazing

Posted by Lucas-Milhaupt Brazing Experts on Feb 6, 2015
Step brazing defined: The brazing of successive joints on a given part with filler metals of successively lower brazing temperatures so as to accomplish the joining without disturbing the joints brazed previously. A similar result can be achieved at a single brazing temperature if the remelt ...
Read More

Topics: Furnace

Copper-Phosphorous Alloys for Copper Brazing

Posted by Lucas-Milhaupt Brazing Experts on Dec 9, 2014
Copper-Phosphorous Alloys for Copper Brazing The alloys copper-phosphorous and silver-copper-phosphorous were patented in the U.S. in 1914 and gained popularity when new refrigerants were developed to replace ammonia. These refrigerants enabled the use of copper to facilitate the increased demand ...
Read More

Topics: HVAC/R, Electrical, Copper, Torch