Can leaf spring be welded

No. Technically, welding leaf springs is possible in a controlled environment. But it's highly unsafe. Welding heats the spring material to elevated temperatures. This can cause carbon steel to lose its tensile strength. If this happens, the welded area may become very weak (fragile) and prone to breaking.

Attempting to weld a broken leaf spring also encounters numerous challenges:

The primary issue is that the heat generated during welding can anneal the steel adjacent to the area being welded. This means the steel becomes softer, weaker, and loses its original properties.

Furthermore, the filler metal you would need to use isn't as strong as spring steel, making the welded trailer leaf spring more susceptible to breaking.

Other concerns include:

The cooling process of the spring also requires careful attention and is prone to errors. If the spring is cooled too slowly, it becomes too soft, and if cooled too quickly, it becomes brittle.

This can occur if you're not conducting the cooling in a controlled environment. However, with metallurgical knowledge, you might successfully weld a trailer leaf spring without compromising its required performance. I recommend leaving it to professionals who frequently perform such tasks. Additionally, you can avoid this issue by simply replacing the trailer leaf spring.

Overall, welding a broken leaf spring is not a wise choice, and LUEN does not recommend doing so.