By -
Date 04-04-2005 01:14
Rod,
I've been a Welding Engineer for almost 33 years and I've never heard of any advantage of using a "lower" alloyed filler metal in most cases. Since most every filler metal is overalloyed in regards to the comparable base metal, it is almost always advisable to use the highest alloyed metal when welding two dissimilar metals. Rod, I do not doubt what you are saying, but this is news to me. When using the lower alloyed filler metal one will compromise the integrity of the higher grade of the two dissimilars. Depending on the heat input, using the lower grade can, due to the loss of alloying agents in the weld arc, one can actually be below the chemistry of both metals and that ain't good....
CM