I am looking for a material to use, namely Silicon Carbide, and it gives a "Thermal Shock Paramter - 167C" Obviously thermal shock is going to be failure when there is a rapid temperature change, but what does 167C mean? It's not a rate of cooling, just a temperature. I cant find anything on it in my book or in google. Im guessing it might be a value like a Hardness value set against a standard? http://www.ceradyne.com/Uploads/Silicon_Carbide_data_sheet_10-03.pdf I tried to call them but there closed for the rest of the week.