I use a herbal vaporizer with a 316 stainless steel screen which the manufacturer says to be inert up to 800F. This screen often needs replacement, and the replacement screens which I find in local shops do not specify which alloy of stainless steel they are. The temperature of this herbal vaporizer will definitely stay below 500F. Can I assume that any type of stainless steel screen I purchase will be inert up to 500F? I appreciate your help.