Difference Between Brazing and Soldering
When it comes to joining two metal pieces together, brazing and soldering come to mind. Although these two methods are used to achieve the same result, there are some key differences between them.
Process
Brazing is a process that involves heating a metal joint to a temperature that is above the melting point of the filler metal. This filler metal melts and flows into the gap between the two metal pieces, forming a strong bond upon cooling. On the other hand, soldering involves heating the metal joint to a temperature that is below the melting point of the filler metal. The filler metal then melts and flows into the joint, forming a bond upon cooling.
Strength
One of the main differences between brazing and soldering is the strength of the bond formed. Brazing results in a much stronger bond as compared to soldering, as the filler metal used in brazing typically has a higher melting point and is able to form a more robust bond. Soldering, on the other hand, results in a weaker bond as the solder used has a lower melting point.
Temperature
The temperature required for brazing is usually higher than that required for soldering. Brazing requires temperatures in excess of 450°C whereas soldering requires temperatures below 450°C. This is because brazing involves the melting of the filler metal while soldering requires only the melting of the solder.
Applications
Brazing is suitable for joining metals that have higher melting points such as stainless steel, copper and nickel alloys. It is also used for joints that will experience high stress or exposure to high temperatures. Soldering, on the other hand, is suitable for joining metals with lower melting points such as brass, tin, and aluminum. It is typically used for electronic applications, plumbing, and jewelry making.
In conclusion, brazing and soldering are both effective methods of joining metal pieces together. However, the choice between brazing and soldering depends on the specific application and the properties of the metals being joined. Brazing is the stronger of the two methods but requires higher temperatures, while soldering is a more delicate process that is suited for joining lower melt points.
Table difference between brazing and soldering
| Brazing | Soldering | |
|---|---|---|
| Definition | The process of joining two metal pieces by heating them to a temperature above 840°F using a filler metal, which has a melting point above 840°F, but below the melting point of the base metals. | The process of joining two metal pieces by heating them to a temperature below 840°F using a filler metal, which has a melting point below 840°F, but above the melting point of the base metals. |
| Strength | The joint is stronger than soldering because the filler metal used has a higher melting point and better mechanical properties. | The joint is weaker than brazing because the filler metal used has a lower melting point and mechanical properties. |
| Temperature | The temperature required for brazing is higher than soldering, which makes it effective for joining metals with high melting points. | The temperature required for soldering is much lower than brazing, which makes it suitable for joining metals with low melting points. |
| Equipment | Brazing requires more specialized equipment, including a high-temperature furnace or torch. | Soldering requires simple equipment, such as a soldering iron or a solder gun. |
| Applications | Brazing is used for joining high-stress, high-temperature parts, such as aircraft engines, heat exchangers, and plumbing. | Soldering is used for joining low-stress, low-temperature parts, such as electronics, jewelry, and plumbing. |