I need to mark parts that are going to be heat treated. The parts may be various alloys. Some high temp materials(not much oxidation)and some that will develop significant scale. The marking is mainly for identification purposes but somtimes it is used to help us find certain indications that are present before heat treating. The temperatures range from just above ambient to 1200C. The marking medium will have to go through strict tests to assure it does nothing detrimental to the alloys under temperature. Any ideas about markers, inks/waxes and suppliers would be welcomed Thanks
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