Hi,
I have some questions and i am trying to find out some reliable source for answering those questions.

1. what is the formula for calculating spot size in conduction/fushion laser welding?
2. when should you use filler wire in laser welding?
3. In case of conduction mode laser welding of a But joint what is the minimum penetration it should have to meet the AWS standard?

I will be waiting to listen from the forum members.

thank you

regards
Sazid