"JohnB" wrote in message
oups.com...
On Jun 8, 1:05 pm, "Leon" wrote:
"

Yes it is a carbide blade. The discoloration, bluish in color, is
visible on three teeth out of thirty and is not on the brazing but on
the side of these carbide teeth and across the face of one.


New to me, usually a discoloration in the metal color like that means the
hardness has been compromised. I would be leery, I have never seen carbide
to that.