Alberta Boilers Safety Association (ABSA) Practice Test

Brazing is done at a temperature?

1. Below 450°C

2. Above 450°C

3. Above 900°C

4. Above 1000°C

The correct answer is: Above 450°C

Brazing is a metal joining process that involves melting and flowing a filler metal into the joint between two or more close-fitting parts. The key aspect of brazing is that it is performed at temperatures that are above 450°C (842°F) but below the melting point of the base metals being joined. The correct answer indicates that brazing occurs above 450°C, which aligns with the recognized definitions and guidelines within the industry. This temperature range distinguishes brazing from soldering, which is typically conducted at lower temperatures (below 450°C). Ensuring that brazing is performed at the appropriate temperature is crucial, as it allows the filler metal to effectively bond with the base metals, creating a strong joint. This temperature control is essential to prevent the base metals from melting while still enabling the filler metal to flow and fill the joint completely. In contrast, temperatures above 900°C and 1000°C are generally more aligned with processes such as welding, which involve melting the base metals themselves. Understanding these temperature distinctions is critical for anyone working in metal fabrication or repair, as it affects the mechanical properties and integrity of the resulting joint.