---
title: Advantages and Disadvantages of Vacuum Brazing
description: Get an overview about the advantages and disadvantages of vacuum brazing. Hard- and high-temperature vacuum brazing is a joining technology which can be used to produce firmly bonded connections and to join complicated geometries or rather several joints simultaneously.
image: https://info.listemann.com/hubfs/iQtemp_vakuumloeten.jpg
---

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# Advantages and Disadvantages of Vacuum Brazing

*Manfred Boretius, 16. June 2019*

![Advantages and Disadvantages of Vacuum Brazing](https://info.listemann.com/hubfs/iQtemp_vakuumloeten.jpg)

The modular design of components leads to simplified manufacturing processes and cost savings - but these are by far not all the advantages of vacuum brazing. 

Hard- and high-temperature vacuum brazing is a joining technology which can be used to produce firmly bonded connections and to join complicated geometries or rather several joints simultaneously. 

### **Vacuum brazing is characterized by its great universality and flexibility and has the following advantage**:

- An almost unlimited range of materials can be used (base materials and brazing alloys)
- Minor distortions due to an even furnace heating
- Very good joining quality due to the vacuum atmosphere
- High strength, even at high operating temperatures
- Avoidance of fluxes
- High reproducibility due to excellent temperature uniformity and comfortable control of modern furnace systems, including the process documentation
- Possibility of a combined heat treatment (brazing and hardening)
- Large-scale components can be joined
- No oxidation and annealing colour
- Hardening and annealing can be integrated into the process
- Low environmental impact
  
   

### **The disadvantages of vacuum brazing are:**

- Mostly batch processes with single batches. A continuous production is only possible with a very complex manufacturing facilities
- Eventually high effort to fix components as components cannot be manipulated in the furnace
- The whole component is heated, leading to a decrease of the hardness with already quenched and tempered materials or work-hardened materials
- High investment costs

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