I started to melt some Cast Iron today

[dallen]

here's a couple of photos of the casting after I found an insert that I would cut thru the hard corner edges, the middle machined great last night.

the more I look at this the more I'm thinking its steam from using the green sand and it being so fine that the steam couldn't escape and the fact that I didn't put any vents in the mold, which is something that I usually do even if the mold doesn't need it.


This think looks like Swiss Cheese the deeper you get into it the bigger the holes get.

I ended up using a big TPG 432 I don't know any thing more then that about the inserts I was given them by the guy at the local supply house they were a sample that had been dropped off, he knows I like samples so he tosses some my way every now and then, just so happened I had a bar that I had milled down from 1" square to 1X.5 that a friend had pawned off on me saying he couldn't use it.

Right photos of swiss cheese