At what temperature will 50/50 solder melt while soldering a copper pipe?

The melting point of 50/50 solder, which is a common alloy used in plumbing, typically ranges between approximately 430°F to 460°F. Therefore, stating that it melts below 800°F and above 300°F is accurate, as those temperatures encompass the melting range of the solder, ensuring that it effectively flows and bonds to the copper pipe without overheating or damaging the surrounding materials.

This option confirms that the melting point is low enough to avoid excessive heat that could potentially distort or damage the pipe material while still being substantial for effective soldering practices. Other listed temperatures either exceed or inaccurately narrow down the melting point, making them unsuitable for use in practical soldering scenarios.