In the USA molybdenum disulfide seems to be in most anti-sieze products. I've even bought the purple antiseize with ground ceramic particles in the US. But in the UK they are crazy about copper grease.
I mean, the grease base (often lithium) burns away, so the antiseize material that remains in between the threads is either copper, MoS2, ceramic particles, or whatever. The melting point of MoS2 is higher than copper, and ceramic is even higher. But melting point isn't everything. The copper could act as a coating.
I know that the different anti-seize greases have different properties and are specified for slightly different uses, but in real life does anyone have experience using different types of anti-seize greases on the same high-temp threads and have noticed anything different?
Also, those stainless steel bolts are probably really difficult to get out because of the cast iron rust in the female threads. But if a steel bolt were used it might never come out. And as a note, be careful using stainless steel bolts with stainless steel nuts because the threads can self weld when tightened. This happens often with soft stainless steel nuts and bolts, like A2 304 hardware but also A4-70 316. A4-80 is a touch better, but still. I always use a wrap or two of teflon tape in low temperature applications, or antiseize when using stainless nuts and stainless bolts. Ideal for hot areas are two dissimilar non-corrosive metals: like stainless steel studs but nuts made of alloys, like brass.