Note that I didn't say it was without problems. Note also that I stated "reliably". It can be darn hard to get a reliable weld in most other high carbon steels. I'm not trying to be confrontational about this (I even started to not respond to this since it's just things like this that start the wars that are making this group less than it was when it started).
I just stated that with a low hydrogen process and attention to not
cooling it to quickly (don't dunk it in water), and preferably some
preheat in the piece it's very possible to make a strong weld in 4140.
As for the machining I said flat out that it tends to get pretty darn
hard if not treated properly after the weld. Several times in that
As for cast iron I'm of the opinion that there's nothing that will
replace brazing. I don't even use nickel rods unless I'm force to for
some reason or another.
- posted 16 years ago