What technique is used to join copper and brass metals?

Brazing is the correct technique used to join copper and brass metals due to its ability to create strong, durable joints without melting the base materials. This process involves heating a filler metal to a temperature above 450°C, which flows into the joint by capillary action. Because copper and brass have different melting points and can be affected by high temperatures, brazing is advantageous as it allows the base metals to remain solid, preserving their structural integrity and preventing warping.

Brazing is particularly suitable for these materials because it produces a strong bond that resists corrosion, making it ideal for plumbing, electrical, and decorative applications. This technique also accommodates larger gaps between the joining surfaces compared to other methods, ensuring versatility in various applications.

Other methods, such as oxy-acetylene welding, MIG welding, and spot welding, involve high temperatures that can easily cause distortion or damage to thin or dissimilar materials like copper and brass. They often require specific conditions or are suited for different types of metals, making them less effective options compared to brazing in this context.