Brazed welding is primarily used for which of the following materials?

Brazed welding is primarily used for copper due to its excellent thermal and electrical conductivity, which makes it a preferred choice in refrigeration and HVAC applications. The process involves the use of a filler metal with a melting point above 450 degrees Celsius, allowing it to bond with copper surfaces effectively without melting the base metal itself. This capability provides strong, durable joints that are essential in high-pressure systems, commonly used in refrigerant lines and heat exchangers.

In addition, brazed joints in copper provide resistance to corrosion and fatigue, ensuring longevity in applications where vibration or thermal cycling might occur. While brazing can be applied to various metals, copper's properties make it especially advantageous in this process for refrigeration systems.