--- title: Blog | Brazing & Soldering Manufacturer | Lucas-Milhaupt | HVAC/R (2) description: HVAC/R | Lucas-Milhaupt has offered brazing and soldering excellence for over 65 years. We are a global provider and producer of metal joining products and services for thousands of companies worldwide. Our blog provides you with valuable brazing solutions, tips, and information that can be applied to your own applications and projects. (2) --- [![Lucas\_Milhaupt\_logo\_digital](https://blog.lucasmilhaupt.com/hubfs/Lucas_Milhaupt_logo_digital.jpg)](https://www.lucasmilhaupt.com/) - [Products](https://www.lucasmilhaupt.com/Products) - [Filler Metals](https://www.lucasmilhaupt.com/Products/Filler-Metals) - [Fluxes](https://www.lucasmilhaupt.com/Products/Fluxes) - [Pastes](https://www.lucasmilhaupt.com/Products/Pastes) - [Distribution](https://www.lucasmilhaupt.com/Products/Distribution) - [Industries](https://www.lucasmilhaupt.com/Industries) - [Aerospace](https://www.lucasmilhaupt.com/Industries/Aerospace) - [Automotive](https://www.lucasmilhaupt.com/Industries/Automotive) - [Electrical](https://www.lucasmilhaupt.com/Industries/Electrical) - [HVAC/R](https://www.lucasmilhaupt.com/Industries/HVACR) - [Medical](https://www.lucasmilhaupt.com/Industries/Medical) - [Microelectronics](https://www.lucasmilhaupt.com/Industries/Microelectronics) - [Oil and Gas](https://www.lucasmilhaupt.com/Industries/Oil-and-Gas) - [Services](https://www.lucasmilhaupt.com/Services) - [Capabilities](https://www.lucasmilhaupt.com/Services/Capabilities) - [Consulting Services](https://www.lucasmilhaupt.com/Services/Consulting-Services) - [Brazing Audits](https://www.lucasmilhaupt.com/Services/Brazing-Audit) - [Tech Support Request Form](https://www.lucasmilhaupt.com/Services/Tech-Support-Request-Form) - [Resources](https://www.lucasmilhaupt.com/Resources) - [FAQ](https://www.lucasmilhaupt.com/Resources-Library/FAQ) - [Literature](https://www.lucasmilhaupt.com/Resources-Library/Literature) - [Demo Videos](https://www.lucasmilhaupt.com/Resources-Library/Demo-Videos) - [Technical and Safety Data Sheets](https://www.lucasmilhaupt.com/Resources-Library/Technical-and-Safety-Data-Sheets) - [Brazing Academy](https://www.lucasmilhaupt.com/Brazing-Academy) - [Brazing Fundamentals](https://www.lucasmilhaupt.com/Brazing-Academy/Brazing-Fundamentals) - [Braze School and Training](https://www.lucasmilhaupt.com/Brazing-Academy/Braze-School-and-Training) - [How to Braze Aluminum](https://www.lucasmilhaupt.com/Brazing-Academy/How-to-Braze-Aluminum) - [Principles of Joint Design](https://www.lucasmilhaupt.com/Brazing-Academy/Principles-of-Joint-Design) - [Why Brazing?](https://www.lucasmilhaupt.com/Brazing-Academy/Why-Brazing) - [Metal Joining: Brazing vs. Soldering](https://www.lucasmilhaupt.com/Brazing-Academy/Metal-Joining-Brazing-vs.-Soldering) - [Metal Joining: Brazing vs. Welding](https://www.lucasmilhaupt.com/Brazing-Academy/Metal-Joining-Brazing-vs.-Welding) - [About](https://www.lucasmilhaupt.com/About) - [Center of Excellence](https://www.lucasmilhaupt.com/About/Center-of-Exellence) - [Certification](https://www.lucasmilhaupt.com/About/Certification) - [Find Locations](https://www.lucasmilhaupt.com/About/Find-Locations) - [Find a Distributor](https://www.lucasmilhaupt.com/About/Find-a-Distributor) - [News & Events](https://www.lucasmilhaupt.com/About/NewsEvents) - [History](https://www.lucasmilhaupt.com/About/History) - [SIL-FOS](https://www.lucasmilhaupt.com/About/SIL-FOS) - [Social Responsibility](https://www.lucasmilhaupt.com/About/Social-Responsibility) - [Careers](https://www.lucasmilhaupt.com/About/Careers) - [Culture](https://www.lucasmilhaupt.com/About/Culture) - [Contact](https://www.lucasmilhaupt.com/About/Contact) # Blog ## [Protecting Aluminum-Copper HVAC/R Joints](https://blog.lucasmilhaupt.com/en-us/about/blog/protecting-aluminum-copper-hvacr-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 ... [Read More](https://blog.lucasmilhaupt.com/en-us/about/blog/protecting-aluminum-copper-hvacr-joints) Topics: [HVAC/R](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r), [Copper](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/copper), [Aluminum](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/aluminum), [Torch](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/torch), [Brazing Tips](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/brazing-tips) ## [Solders for Potable Water](https://blog.lucasmilhaupt.com/en-us/about/blog/solder-for-potable-water) ***Posted by Lucas-Milhaupt Brazing Experts on Apr 14, 2014*** Solders for Potable Water The U.S. Federal Clean Drinking Water Act limited the amount of lead (Pb) in solder to less than 0.2% for potable water systems. Shortly afterward, a new solder alloy was introduced to the plumbing industry for joining copper (Cu) potable-water lines. The alloy, which is ... [Read More](https://blog.lucasmilhaupt.com/en-us/about/blog/solder-for-potable-water) Topics: [HVAC/R](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r), [Solder](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/solder) ## [Washer Calculation](https://blog.lucasmilhaupt.com/en-us/about/blog/free-washer-calculation) ***Posted by Lucas-Milhaupt Brazing Experts on Dec 16, 2013*** Ring vs. Washer Both rings and washers are preform shapes used for brazing. For smaller parts with relatively small joint volume and lap area, either a washer or ring may be used (Figure 1). Both washers and rings can be circular in shape; however, their cross sections will always differ in shape. ... [Read More](https://blog.lucasmilhaupt.com/en-us/about/blog/free-washer-calculation) Topics: [HVAC/R](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r), [Brazing Fundamentals](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/brazing-fundamentals) ## [How to Select a Sil-Fos Alloy](https://blog.lucasmilhaupt.com/en-us/about/blog/sil-fos-alloy-for-hvacr-and-plumbing) ***Posted by Lucas-Milhaupt Brazing Experts on Aug 13, 2013*** Benefits of Sil-Fos® Sil-Fos® alloys have become popular in the HVAC/R and plumbing industries because of these benefits: Ability to join copper to copper without flux, saving time Streamlined brazing operation, saving time Ability to fill a wide range of joint clearances Ease of operator use, with ... [Read More](https://blog.lucasmilhaupt.com/en-us/about/blog/sil-fos-alloy-for-hvacr-and-plumbing) Topics: [HVAC/R](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r), [Aluminum](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/aluminum) ## [Optimal Copper-to-Aluminum Joints](https://blog.lucasmilhaupt.com/en-us/about/blog/testing-aluminum-joint-quality) ***Posted by Lucas-Milhaupt Brazing Experts on Jul 23, 2013*** Optimal Copper-to-Aluminum Joints HVAC/R manufacturers must control several parameters to assure joint integrity when brazing or soldering parts-such as evaporator and condenser coils-to secondary copper lines or assemblies. These parameters include joint design (i.e. joint gap, shear depth, ... [Read More](https://blog.lucasmilhaupt.com/en-us/about/blog/testing-aluminum-joint-quality) Topics: [HVAC/R](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r) ## [Torch Brazing Copper to Copper](https://blog.lucasmilhaupt.com/en-us/about/blog/brazing-copper-to-copper-video) ***Posted by Lucas-Milhaupt Brazing Experts on May 21, 2013*** 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. Insert the tube, with a ... [Read More](https://blog.lucasmilhaupt.com/en-us/about/blog/brazing-copper-to-copper-video) Topics: [HVAC/R](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r), [Copper](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/copper), [Torch](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/torch) ## [AWS Specifications and Classifications](https://blog.lucasmilhaupt.com/en-us/about/blog/aws-specifications-and-classifications) ***Posted by Lucas-Milhaupt Brazing Experts on Dec 18, 2012*** AWS Specifications and Classifications The American Welding Society (AWS) is a nonprofit organization whose purpose is to support the growth of knowledge and technological advances in the field of brazing and other forms of metal joining. They have put into place a list of standards and ... [Read More](https://blog.lucasmilhaupt.com/en-us/about/blog/aws-specifications-and-classifications) Topics: [HVAC/R](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r) ## [Lucas-Milhaupt, Inc. Announces NEW Sil-Fos Rings](https://blog.lucasmilhaupt.com/en-us/about/blog/benefits-of-sil-fos-braze-rings) ***Posted by Lucas-Milhaupt Brazing Experts on Jul 13, 2012*** 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 ... [Read More](https://blog.lucasmilhaupt.com/en-us/about/blog/benefits-of-sil-fos-braze-rings) Topics: [HVAC/R](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r) ## [Brazing vs. Welding](https://blog.lucasmilhaupt.com/en-us/about/blog/brazing-vs-welding) ***Posted by Lucas-Milhaupt Brazing Experts on May 31, 2012*** 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, ... [Read More](https://blog.lucasmilhaupt.com/en-us/about/blog/brazing-vs-welding) Topics: [HVAC/R](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r), [Solder](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/solder) [Previous](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r/page/1) [All posts](https://blog.lucasmilhaupt.com/en-us/about/blog/all) ### Subscribe to Our Blog to Stay Current on All Things Brazing! ### Recent Posts ### Posts by Tag - [Brazing Fundamentals (24)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/brazing-fundamentals) - [HVAC/R (18)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/hvac-r) - [Brazing Tips (13)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/brazing-tips) - [Copper (12)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/copper) - [Flux (12)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/flux) - [Torch (10)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/torch) - [Aluminum (8)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/aluminum) - [Automotive (6)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/automotive) - [Electrical (6)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/electrical) - [Furnace (5)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/furnace) - [High Purity Vacuum Tube Grade (5)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/high-purity-vacuum-tube-grade) - [Aerospace (4)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/aerospace) - [Electronics (4)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/electronics) - [Oil & Gas (4)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/oil-gas) - [Solder (3)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/solder) - [High Silver (2)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/high-silver) - [Low Silver (2)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/low-silver) - [Medical (2)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/medical) - [Stainless Steel (2)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/stainless-steel) - [Steel (2)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/steel) - [Carbide (1)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/carbide) - [Nickel (1)](https://blog.lucasmilhaupt.com/en-us/about/blog/tag/nickel) See all [![Lucas Milhaupt Join with the Best Logo RGB](https://blog.lucasmilhaupt.com/hs-fs/hubfs/Lucas%20Milhaupt%20Join%20with%20the%20Best%20Logo%20RGB.png?width=276&height=93&name=Lucas%20Milhaupt%20Join%20with%20the%20Best%20Logo%20RGB.png)](https://www.lucasmilhaupt.com/) 4850 S. 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