--- title: Designing for Preforms - Introduction description: 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. image: https://app.hubspot.com/Files/Uploads/Blog/Figure_4.jpg --- [![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 # Designing for Preforms - Introduction ***Posted by Lucas-Milhaupt Brazing Experts on Feb 17, 2012*** 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 the shape -- it is manufactured by Lucas-Milhaupt and in many cases only by [Lucas-Milhaupt](http://www.lucasmilhaupt.com/en-US/about/history/). **Designing for Braze Preforms** A [brazing preform](http://www.lucasmilhaupt.com/en-US/services/customshaping/) is any shape of a filler metal so fabricated that it can be easily and conveniently placed in the assembly prior to the brazing operation.  Virtually all high production applications can be designed to take advantage of alloy preplacement.  The filler metals used range all the way from the [soft solders](https://www.lucasmilhaupt.com/en-US/products/fillermetals/solderingalloys/11/) to alloys of [silver](https://www.lucasmilhaupt.com/en-US/products/fillermetals/silverbasedcadmiumfreefillermetals/8/), [gold](https://www.lucasmilhaupt.com/en-US/products/fillermetals/vtghighpuritysilvergoldpalladium/12/), [aluminum](https://www.lucasmilhaupt.com/en-US/products/fillermetals/aluminumfillermetals/1/), [copper](https://www.lucasmilhaupt.com/en-US/products/fillermetals/copperalloys/3/) and brass.  There are different types of preforms, each more adaptable for particular applications.  Their intended use, in turn, determines their selection. Development of the preformed shape for brazing and soldering was, of necessity, coincident with the use of automatic methods of heating.  It is impractical and usually impossible to handfeed the braze alloy to the stream of parts emerging from a conveyer belt furnace, a gas-air turntable, or to work inside the induction coil.  Further, the preform assists automatic heating to fulfill its three-fold purpose; namely speed production, reduce and stardardize costs, and obtain uniform results of high quality in brazed products.  How to accomplish these results is outlined on suceeding pages. ![](https://blog.lucasmilhaupt.com/hs-fs/hubfs/LucasMilhaupt_August2017/Images/Figure_4.jpg?width=400&height=200&name=Figure_4.jpg) A noteworthy article is "[What to Consider when Using Brazing Preforms](http://www.aws.org/wj/2006/09/wj200609/wj0906-52.pdf)" published in the Welding Journal, September 2006 (subscription required). 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