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Brasage d'exception depuis plus de 75 ans. Lucas-Milhaupt est un fournisseur reconnu mondialement et le fournisseur n°1 de produits et de services de brasage pour des milliers d'entreprises dans le monde entier.

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General

vendredi 27 octobre 2017
Lucas-Milhaupt becomes AS9100 Certified Manufacturer

Lucas-Milhaupt is committed to being a quality supplier to the aerospace industry. Which is why we’ve gone the extra mile to receive our AS9100 certification. Here’s what that means for Lucas-Milhaupt and our aerospace industry customers.

mardi 18 juillet 2017
Characteristics of Alloying Elements

Today, our technical team outlines the main elements used in brazing filler metals, along with the most important features of each element. The more you understand about these elements, the better equipped you are to choose and use the correct products for your brazing operation.

jeudi 15 juin 2017
How to Repair a Brazed Joint on Aluminum Heat Exchangers

Braze Joint Repair: Aluminum Heat Exchangers Brazing aluminum heat exchangers is a challenging task, making them susceptible to leaks during service. Replacing them under warranty is costly. Let’s look at an alternative: repairing leaks with a brazing alloy specially made for this application.

jeudi 1 juin 2017
Brazing Surface Preparation: How to Clean Base Materials

Cleaning base materials is one of the Six Fundamentals of Brazing that ensure quality braze joints. Let’s review the key aspects of surface preparation and take a walk through the cleaning process. Having a spotless brazing practice helps maximize your joint quality while minimizing joint failure.

mercredi 12 avril 2017
Your Industry-Specific Brazing Solutions

You want brazing solutions designed for your needs – whether you are manufacturing air conditioning systems for automobiles or highly sensitive jet turbine blades or even components for satellites. Find out which brazing alloys and consumables meet your specific needs.

jeudi 19 janvier 2017
Stay Current on Resistance Brazing

Are you current on resistance brazing and its modern applications? Limitations in assembly geometry have historically restricted its use to flat surfaces. Learn how today’s technology has expanded resistance-brazing applications to more complex assembly styles.

mercredi 19 octobre 2016
Considerations for Carbide Brazing

The mechanical properties of carbides make them useful in applications such as mining tools, cutting tools and wear parts. Let’s look at key factors that play a role in successful carbide brazing: coefficient of thermal expansion, joint design, carbide composition, filler metal selection, flux/atmosphere, fixturing and heating.

jeudi 28 juillet 2016
Vacuum Brazing Success

In the commercial brazing industry, several processes are used to braze assemblies on a repeatable basis. Today, we are focusing on successful vacuum brazing. Part I of this posting addresses basic definitions and processes. In Part II, learn how to choose filler metals for your vacuum brazing application.

mardi 5 juillet 2016
Stop-Off Helps Restrict Braze Alloy Flow

A formulation called Stop-Off can help you restrict the flow of braze alloy on your assembly. When should you use this brazing aid? Which type is right for your brazing process? How does it work?

lundi 16 mai 2016
Flux Removal: Post-Braze Cleaning

When using flux for brazing, you may need to remove residual flux with an appropriate method for your materials and process. Let’s discuss why post-braze cleaning is one of the Six Fundamentals of Brazing and then examine the most common techniques.

mercredi 6 avril 2016
Copper Tubing Braze Alloy Usage Calculator

Conveniently estimate the amount of braze alloy or solder alloy required for plumbing or HVACR applications—with the new online calculator from Lucas-Milhaupt®. Estimate the amount of braze alloy or solder alloy required to join standard plumbing or HVACR tubing by inputting the number of joints to be brazed or soldered, and the desired form of alloy to use.

lundi 29 février 2016
What Can Lucas-Milhaupt Technical Services Do for You?

Today’s companies are under continual pressure to improve skills, processes and products while reducing costs. Learn how the Lucas-Milhaupt® Technical Services Group can help you optimize your brazing operation, with cutting-edge workforce training, on-site brazing audits plus consulting and engineering assistance.

jeudi 24 septembre 2015
Brazing Components for Refrigeration

Are you brazing components for the refrigeration industry? This article is Part 2 of a two-part series on brazing for HVAC/R. Part 1: Brazing for the Refrigeration Cycle introduced the basic processes of a refrigeration cycle. This second article features the correct application of brazing filler metal to refrigeration components.

lundi 3 août 2015
Brazing for the Refrigeration Cycle

One of the many industries using brazing is the refrigeration industry. This article is Part 1 of a two-part series on brazing for refrigeration. Today, we will focus on the basic processes of a refrigeration cycle. The second article will feature the correct application of brazing filler metal to components of the refrigeration cycle.

mercredi 1 juillet 2015
Brazing with Pre-formed Rings vs. Hand-fed Rods

What is the difference in joint quality between brazing with pre-formed rings vs. hand-fed filler metal rods? Could brazing with rings increase joint quality while reducing excess material usage? Join us as we share results from a recent experiment at the Lucas-Milhaupt lab.

vendredi 24 avril 2015
De-alloying or Selective Attack in Brazing

When you expose silver-brazed joints to water environments under specific conditions, dezincification of the brazing alloy can take place, leading to joint failure. What is dezincification? What are the influencing factors? Are there solutions? Let’s dive in and discover the answers.

mardi 24 mars 2015
Aluminum Brazing: Corrosive or Non-Corrosive Flux

Many automotive and HVAC/R manufacturers use all-aluminum or mostly aluminum components. When brazing aluminum, two families of fluxes are commercially available: corrosive and non-corrosive. Let’s talk about choosing the proper flux for your application, including the advantages of each.

mercredi 25 février 2015
The Effect of Joint Clearance on Braze Joint Strength

Having trouble with braze joint strength? Check your joint clearance. Brazing uses capillarity to distribute molten filler metal between base metals. When the clearance is narrow and you are brazing with flux, it is difficult for the flux to flow. Capillary action can be inhibited, resulting in reduced strength of the braze alloy. We will explore ideal clearances for various fillers and heating methods, plus base metal properties, joint design and metallurgical interaction.

vendredi 6 février 2015
Step Brazing

Does your process include the challenge of brazing or assembling components with two joints in close proximity—having one joint that cannot run the risk of being remelted due to quality requirements? You may need to resort to step brazing. Join us for a discussion on the applications and alloys involved, along with some common pitfalls and tips for prevention.

mardi 9 décembre 2014
Copper-Phosphorous Alloys for Copper Brazing

Copper-phosphorous brazing alloys are used extensively for joining copper. These alloys are useful in HVAC/R applications involving copper tubing and in industries using electrical conductors. Today, we are exploring the effects of phosphorous when alloyed with copper, and we are also discussing what happens when silver is added to the alloy.

vendredi 14 novembre 2014
Materials Calculators Blog

When ordering alloys, you may have the dimensions or length of a braze joint, but many products are sold by weight. How much should you order? Or, conversely, you may know the mass/weight, but need the length. Introducing: the new Lucas-Milhaupt materials calculators.

lundi 4 août 2014
Torch Brazing Stainless Steel

Brazing stainless steels requires adequate planning, as the alloys used to form joints must have properties compatible with the base metal. However, a key advantage is that many dissimilar metals can be joined to stainless steels by brazing. The brazing process can yield strong joints that are ductile, clean and smooth. Tune in for today’s tips on torch brazing stainless steel.

vendredi 11 juillet 2014
Inspecting Brazed Joints

You have designed your braze joint, selected the appropriate braze materials, factored in fixturing, planned the brazing process and considered cleaning needs. However, have you built into the process how you will inspect the finished brazed joints? Let’s investigate this vital step in ensuring the quality and performance of your finished product.

jeudi 15 mai 2014
Protecting Aluminum-Copper HVAC/R Joints

The HVAC/Refrigeration industry is converting many components from copper to aluminum. These aluminum parts are then typically joined to copper components via brazing. The resulting joints must be protected from galvanic corrosion in the HVAC/R environment. In today’s posting, we will discuss the challenge as well as potential solutions.

lundi 14 avril 2014
Solders for Potable Water

It has been more than 20 years since the passage of the Federal Clean Drinking Water Act in the U.S., which limited the amount of lead (Pb) in solder used for potable water systems. Let’s look at the non-Pb-bearing alloys and the implications for proper joining, plus recommended fluxes for soldering in this application.

mercredi 26 mars 2014
Liquidus vs. Solidus

When choosing a filler metal for brazing applications, it is important to consider melting behavior—specifically liquidus temperature. Today, we will look at the differentiation of liquidus vs. solidus, considerations for the brazing operation, and examples of appropriate filler metals for specific situations.

jeudi 6 mars 2014
Liquid Metal Embrittlement

Liquid Metal Embrittlement (LME) is a phenomenon where certain ductile metals experience a failure in a brittle mode when exposed to a liquid metal. Do you know the conditions under which LME can occur, and how to avoid it? Let’s explore the topic in today’s posting.

vendredi 21 février 2014
Brazing of Beryllium-Copper Alloys

Beryllium copper, when fully heat treated and cold worked, is the hardest and strongest of copper alloys. Beryllium-copper alloys are available in two classes: high strength and high conductivity. Let’s discuss the applications and procedures for brazing with these alloys.

lundi 3 février 2014
Warranty Statement

Customers frequently ask, “What is the shelf life of your formulated products?” Lucas-Milhaupt provides a warranty, rather than a shelf life, for its products. Learn more about the difference between a warrant and a shelf life, and read about warranties on our various brazing products.

lundi 16 décembre 2013
Washer Calculation

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. Both washers and rings can be circular in shape; however, their cross sections will always differ in shape. A washer has rectangular cross section, whereas a ring has a circular cross section.

mardi 3 décembre 2013
Furnace Atmosphere

When brazing with a furnace, the type of atmosphere plus compatibility with the base materials and filler metals are key to successful joining. Manufacturers that are mass producing large assemblies often rely on controlled atmospheres and vacuum furnaces—to achieve the benefits of reduced oxides, minimal use of flux and cleaner finished pieces. Which atmospheres are best for your applications? Let’s discuss the science and various scenarios of furnace atmosphere.

mercredi 6 novembre 2013
Tips for Designing Braze Joints

What are your primary considerations for designing a braze joint? Perhaps strength, corrosion resistance, or other factors top your list of requirements. How will you design braze joints to meet these objectives? Today’s blog offers Ten Tips from the Lucas-Milhaupt Lab for designing successful braze joints.

lundi 14 octobre 2013
Brazing Brass to Copper with Braze™

Many manufacturers today—especially those in the HVAC/R, plumbing, and heat exchanger industries—are joining a combination of copper and brass components. Tune in to the latest Lucas-Milhaupt® video providing steps for successfully brazing brass to copper with our lowest-melting-temperature, cadmium-free silver brazing alloy – Braze™ 560.

mardi 8 octobre 2013
Fixtures for Brazing & Soldering

Fixture design is one of the most important factors in assuring quality of brazed or soldered joints. In turn, joint design is key to efficient fixturing. Tune in for Lucas-Milhaupt’s tips on improving fixture design—and altering joint design—to increase efficiency and reduce costs. Helpful examples and diagrams are included.

mercredi 21 août 2013
Brazing Copper and Brass

Our subject today is brazing copper-brass systems. HVAC/R, plumbing, and heat exchange components often involve a combination of copper tubing and brass valves, fittings, and parts. When do you need flux, and what brazing scenarios allow self-fluxing? How do you braze copper-brass components to achieve reliable joints that will perform well in the field? This four-minute video will give you step-by-step insights!

mardi 13 août 2013
Selecting a Sil-Fos Alloy

Lucas-Milhaupt’s Sil-Fos® alloys are copper-based filler metals that are self-fluxing on copper because of their phosphorous content. HVAC/R and plumbing suppliers save time by eliminating the additional steps necessary when flux is included in the brazing process. Join us for a discussion on the properties of various Sil-Fos options, and choose the best alloy for your operation.

mardi 23 juillet 2013
Optimal Copper-to-Aluminum Joints

Attention: HVAC/R associates! Our April 2012 blogs on joining copper to aluminum generated much interest from readers, so we will continue the topic. Today, we focus on optimal brazing and soldering conditions, plus consumables, for copper-to-aluminum transition joints. We will discuss use of preformed rings vs. hand-fed alloys, joint design, use of sockets, and test results on the best-performing alloys.

jeudi 11 juillet 2013
Preferred Torch Brazing Flame Types Video

What is the best flame to use for brazing your products? Let’s fire up the torch and analyze three types of flames, through our latest technical video. We’ll show you how these flames work and discuss the best flame for your application.

jeudi 20 juin 2013
Comparison of Brazing Rings & Flat Rods

Many HVAC/R contractors perform prefabrication on their refrigeration units prior to installation. Often, copper tubes and lines are joined by torch brazing and hand feeding braze alloy. This process is time consuming and can result in inconsistencies—both in volume of alloy applied and quality of joints produced. Learn how brazing with preformed rings can save time and money, plus improve quality.

jeudi 6 juin 2013
White Flux vs. Black Flux Video

What is the difference between white-colored flux and black-colored flux? Spend a few minutes watching our newest technical video to find the answer and learn when to use these different brazing materials.

jeudi 30 mai 2013
Oxy-acetylene Torch Safety

The oxy-acetylene torch is a popular heat source in the brazing industry. It offers the advantage of a 5,500°F flame temperature with the versatility of a hand-held system. However, operators must observe safety precautions; while oxygen and acetylene are not volatile gasses, they are explosive when combined under certain conditions.

mardi 21 mai 2013
Brazing Copper to Copper

Lucas-Milhaupt will show how to braze copper tubing and fittings easily, with the help of Sil-Fos® filler metals. Note that no flux is required, because the phosphorus in Sil-Fos provides a self-fluxing ability when used with copper

mardi 7 mai 2013
Hi-temp Flux Blog

Why is a high-temperature flux required when brazing with some alloys? Certain materials, such as tungsten carbides, cast irons, steel, stainless steels, plus nickel-based and heat-resistant alloys, require a brazing approach geared to high temperatures. Together, high-temperature fluxes and braze filler metals produce strong joints that prove robust for mining or construction applications. How do you choose the correct flux and filler metal? Join today’s discussion to learn more!

vendredi 12 avril 2013
Stages of Flux Video

You may be familiar with Lucas-Milhaupt Handy® Flux, which has been an industry standard for over 70 years. We provide brazing flux for every brazing application, including high and low temperature, furnace and induction brazing, plus automated applications. In about three minutes, our newest technical video will make you a “pro” on the Four Functions of Flux and the Four Stages of Flux—understanding of which is vital to your brazing success. Please join us.

mardi 19 mars 2013
Stop-Off Blog

Stop-Off: Controlling the Flow of Alloy In brazing, we focus much importance on cleaning parts to remove oils, dirt, and oxides. This is because braze alloy will not flow over areas not properly cleaned, and the quality of the braze joint will be compromised. BUT, what about situations where you DO NOT want alloy to flow or bond? Because of aesthetics, tolerances, or subsequent assembly steps, you sometimes need the flow of braze alloy to be contained or redirected—to STOP flowing or to stay OFF a surface. Examples include precise designs involving threads or holes. Read on for a discussion about the unique product called Stop-Off.

jeudi 14 mars 2013
Joining Aluminum to Copper Video

Video: Joining aluminum to copper can present some challenges, if you are new to the process. Manufacturers in the HVAC/R industry are using more all-aluminum components, requiring reliable joints to copper parts.

jeudi 7 mars 2013
Interfacial Corrosion

Interfacial Corrosion The situation: When brazing stainless steel with flux, subject to a damp environment, you notice rust-like spots around the periphery of the braze metal. Rapid corrosion may begin within two days or even as soon as two hours. The brazing filler metal may eventually peel away from the stainless steel surface. Ultimately, complete separation of the filler metal from the stainless steel may occur, resulting in complete failure. Why does this happen? How can the problem be avoided? Join us for a discussion on the science behind this issue and the solutions that help avoid interfacial corrosion.

vendredi 15 février 2013
Brazing Copper to Steel with Handy One®

Video: Brazing Copper to Steel For brazing copper to other metals such as steel, flux application is required. Traditionally, you would use a silver brazing alloy rod or preform ring with a paste flux. This two-step brazing process can be time-intensive and costly. It can also introduce inconsistencies which decrease product quality and increase scrap rates. Is there a better way? See our latest video clip!

vendredi 8 février 2013
Capillary Action Video

NEW from Lucas-Milhaupt: a series of short video clips sharing important information on key brazing topics. Welcome to our first video of 2013, featuring capillarity.

mardi 18 décembre 2012
AWS Specifications and Classifications

For those new to the field of brazing or its specific applications, the names of braze alloys can be challenging to understand. This is because the various companies selling braze alloy have unique product names, but many characteristics of the materials may, in fact, be similar. How do you understand and compare products? The American Welding Society (AWS) provides a system; we’ll explain how it works.

mercredi 21 novembre 2012
Calculating Ring Volume

To produce a proper braze joint, the volume of alloy used must match or exceed the volume of the joint to be brazed. The use of excess alloy adds cost and may require an additional post-machining operation. To ensure consistency in brazing, Lucas-Milhaupt has developed rings of pre-measured braze alloys for each specific application. These products ensure proper ring volume for the tube-and-fitting application, but first, the volume of the joint clearance must be properly calculated. Let’s walk through the process.

mardi 6 novembre 2012
Alloy Consumption Savings with Handy One

Alloy Consumption Savings When operators manually braze components with a torch, solid wire, and a separate brazing flux, there is a variance in the amount of brazing alloy among joints. This can result in excess alloy being consumed. Excess alloy means wasted materials, inconsistent brazing, and higher costs. Read on for a better alternative!

mardi 16 octobre 2012
Vacuum Tube Grade Brazing Alloys

The performance demands of the aerospace, medical, electronics, and commercial industries require an unparalleled degree of reliability. Their complex equipment is only as reliable as its components. Lucas Milhaupt has worked closely with customers to develop Vacuum Tube Grade (VTG) brazing alloys that meet their exceptional specifications and demanding application requirements. Join us for today’s discussion of VTG brazing materials!

lundi 8 octobre 2012
Designing Braze Joints at Temperature

In Lucas-Milhaupt’s 70 years of experience with brazing, we have found that proper braze joint design is essential to ensuring the highest strength and quality braze joint. Factoring brazing temperature into the design formula is key to success. Interested? Join us for a deep dive into braze joint design!

vendredi 28 septembre 2012
Capillary Action in Brazing

Lucas-Milhaupt has 70 years of experience providing products and services for the brazing industry. When working with manufacturing clients, we often emphasize the importance of capillary action in the brazing process. This action draws molten alloy into the joint between two metal parts. But what exactly IS capillary action? How does it work? And what factors inhibit its action? Today, we will focus on the scientific phenomenon of capillary action.

mercredi 19 septembre 2012
Handy One® Improves Joint Quality and Reduces Flux Usage

Brazing with Handy One® Brazing is commonly used in HVAC/R, automotive, aerospace, and other industries to join assemblies and different base metals. Brazing flux is applied to assemblies to prevent oxidation and allow the braze alloy to form the joint. When flux is applied externally before heating, a two-step, manual process is used. This introduces variable factors into the brazing process. Lucas-Milhaupt Handy One® flux-cored alloys offer a one-step alternative for brazing assemblies. These products can improve the quality of braze joints and reduce flux usage while streamlining the manufacturing process. Do you want better quality parts and reduced production costs? Read on for details!

vendredi 13 juillet 2012
Lucas-Milhaupt, Inc. Announces NEW Sil-Fos Rings

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.

mercredi 27 juin 2012
Choosing Flux for Silver Brazing

Silver brazing may be used in the manufacture of HVAC/R condensers and evaporators, construction and mining equipment, electrical assemblies, aerospace and transportation components, art and jewelry, plus other applications. During this process, a chemical compound called flux is applied to joint surfaces just before brazing. For silver brazing, several flux types are available for various base metals and brazing conditions. How do you choose the correct flux? It depends on the base metal, filler metal, and brazing process/heating method. Read on for details!

jeudi 31 mai 2012
Brazing vs. Welding

There are a number of options for joining metal parts, including adhesive bonding, nuts and bolts, and other mechanical fasteners. But for strong and permanent metal joints, the choice usually comes down to welding or brazing. What’s the difference? When should you use brazing vs. welding?

vendredi 18 mai 2012
Fundamentals of Brazing Part 2

There are six fundamentals of brazing that every brazer should follow to ensure consistent and repeatable joint quality, strength, hermeticity, and reliability. The final three fundamentals are: assemble for brazing with proper fluxing, properly heat to braze the assembly, and cleaning the brazed joint.

vendredi 4 mai 2012
Fundamentals of Brazing Part 1

There are six fundamentals of brazing that every brazer should follow to ensure consistent and repeatable joint quality, strength, hermeticity, and reliability. The first three fundamentals are: Good Fit and Proper Clearance, Clean Metals, and Proper Flux/Atmosphere.

jeudi 26 avril 2012
HVAC Joining Aluminum to Copper

As the HVAC industry uses more aluminum components, manufacturers need to join these parts—such as evaporator and condenser coils—to secondary copper lines or assemblies. In brazing or soldering, joint design and brazing/soldering consumables become key elements for joint integrity. Let’s head to the lab, as Lucas-Milhaupt tests the effect that different joint designs and brazing/soldering materials have on the quality of joints. Results will help you determine suitable means for joining your copper-to-aluminum components.

lundi 2 avril 2012
HVAC Trend: From Copper to Aluminum

Let’s look at an important trend in the HVAC/R industry: the move from copper to aluminum. Growing worldwide demand for HVAC/R—particularly cooling needs—is driving industry developments. Legislation is pushing improvements in energy efficiency during the manufacture of HVAC/R systems. Material costs and the need for reliable field performance have opened the door for a move from copper to aluminum. Lucas-Milhaupt offers the expertise and materials needed to support the transition to aluminum enabling companies to braze aluminum evaporator and condenser coils along with other aluminum components.

lundi 20 février 2012
Designing for Preforms - Selecting the Brazing Preform

In setting down the various preforms available, we may be guilty of too much detail. At the same time, we do want you to have a complete selection. We will go through the variations with illustrations alongside.

vendredi 17 février 2012
Designing for Preforms - Introduction

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.