Q&A for How to Torch Weld

For welding, you use the same metal as the filler that you are welding. For example, mild steel rod to weld mild steel. Using dissimilar metals is brazing or soldering.

It should be OK depending on the thickness of the metal; in most cases, yes.

Yes, but the effect and strength is undesirable; the steel would not heat up at the same temperatures, causing insufficient fusion of the metals.

It is known as a torch striker or flint striker. Or, describe it as you have if you forget.