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

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 ...
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Topics: HVAC/R, Torch

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 ...
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Topics: Copper, Nickel, Aluminum, Torch

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 ...
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Topics: HVAC/R, Electrical, Copper, Torch

Torch Brazing Stainless Steel

Posted by Lucas-Milhaupt Brazing Experts on Aug 4, 2014
Torch Brazing Stainless Steel Stainless steels encompass a variety of iron-based alloys, having more than 10% chromium, which offer corrosion resistance through a transparent chromium oxide layer. The AWS Handbook lists five categories of stainless steels: Austenitic (nonhardenable) steels (i.e. ...
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Topics: Automotive, Stainless Steel, Torch

Protecting Aluminum-Copper HVAC/R Joints

Posted by Lucas-Milhaupt Brazing Experts on May 15, 2014
Aluminum-Copper HVAC Protection The HVAC/Refrigeration industry is converting many components from copper to aluminum. The reasons? Aluminum is less expensive by weight, is more corrosion resistant, weighs less, and maintains similar heat-transfer rates to copper. These aluminum parts are joined to ...
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Topics: HVAC/R, Copper, Aluminum, Torch, Brazing Tips

Torch Brazing Brass to Copper with Braze™

Posted by Lucas-Milhaupt Brazing Experts on Oct 14, 2013
Video: Joining Brass to Copper Braze 560 alloy is a near eutectic. Watch our three-minute video to see how this material freely wets and flows on brass and copper components. We will show you the critical steps for successfully fluxing and brazing parts to achieve quality joints. Watch for tips on ...
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Topics: Low Silver, Copper, Torch

Oxy-acetylene Torch Safety

Posted by Lucas-Milhaupt Brazing Experts on May 30, 2013
When it comes to safely brazing with oxy-acetylene torches, let's look at two important aspects: safety equipment, plus procedures for safe operation. This is serious business:  arc rays and sparks can result in loss of sight, fume inhalation can lead to lung damage, and other accidents can cause ...
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Topics: Torch, Brazing Fundamentals, Brazing Tips

Torch Brazing Copper to Copper

Posted by Lucas-Milhaupt Brazing Experts on May 21, 2013
Copper Brazing Video In about four minutes, this technical video will give you an up-close, step-by-step view of successful copper-to-copper brazing.  You will learn these important steps to achieving strong, reliable joints: 1.      Clean tubing and fitting, removing burrs and contaminants 2.      ...
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Topics: HVAC/R, Copper, Torch

Torch Brazing Copper to Steel with Handy One®

Posted by Lucas-Milhaupt Brazing Experts on Feb 15, 2013
Traditional Braze Alloy and Flux Paste vs. Flux-cored Brazing Products In less than five minutes, this technical video clip from Lucas-Milhaupt will show you the Handy® way to improve your process for brazing copper to steel. Handy One® flux-cored products offer these benefits: No separate ...
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Topics: Copper, Steel, Torch