I have two little bricks, about 2x2x7 inches or so, or grey ceramic. It is easily scratched by knife and can be machined like on a lathe (I have a few little machined bits of it also). It is a little bit tougher than regular chalk. The person who sold it to me (in that big lot of TIG things) told me that it is for making custom nozzles and high temp stuff. Is there some way to id it?
i- posted
17 years ago