"Tom Gardner" wrote in message
m...
Too hot! Read the rest of the posts. I would add that you need to tune
your flame by adding oxygen slowly untill the "feather just
dissapears...thus a "Neutral" flame. If you add too mush oxygen to a
pointy
flame it is a "Reducing" flame and will break-down metals and cause brass
separation and steel out-gassing and poping. If the flame is too rich
with
Acet., ( big feather) it will contaminate the piece with carbon. ...or
something like that.

Reducing flame is carbon rich. Oxygen rich flame (hot blue/white cone) is
an oxidizing flame. A neutral flame is desirable for brazing.

Harold