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Why is a soft flame especially desired when welding aluminum?

It allows for faster welding

To avoid creating holes in the metal

A soft flame is especially desired when welding aluminum primarily because it helps to avoid creating holes in the metal. Aluminum has a relatively low melting point compared to many other metals, and it can easily be overheated. When the flame is too aggressive or hard, it can rapidly heat the aluminum and lead to excessive melting, which can cause holes or unwanted burns in the material.

Using a soft flame provides a gentler heat application, allowing for better temperature control. This is crucial because aluminum can form an oxide layer that is harder to weld through. Thus, a soft flame helps maintain the desired melting point without damaging the workpiece, ensuring the welds are strong without compromising the integrity of the metal. Therefore, achieving the right flame characteristics is key to successful aluminum welding and producing high-quality results.

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It produces a cleaner finish

It is easier to control

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