Just filmed 90 minutes with Mark Aspery and a local metalurgist talking heat treating.
Mark said using a magnet may not get the tool steel hot enough to get austinite which means it may not be as hard as it should or could be. He said the higher the carbon the hotter it needs to be to get hard.
Not sure what I will do with this footage.
Probably use it as fill with another conference footage to make a DVD.
Dont have room on the Aspery DVD I will be making for UMBA as he will almost fill with what he did Sat and Sunday. It was an excellent demo by the way.
He made a hot cutter, hammer eye drift, hamer, tongs. forge welded, water leaves more forge welding, a bird, told jokes and did the heat treat seminar at night
If you have the chance to see Mark try your best to go. I know he is going to BAM and the guild of metalsmiths plus a couple of others or more.