3DM-ABS doesn’t need much at all. 15 minutes should be fine, 30 if you want to be totally sure.
There are some types of resins that do also get harder (which isn’t necessarily stronger, it may be more brittle) with heat curing, especially for high-resolution resins that contain a lot of dyes/pigments that would block UV from reaching the core of the part.
I’ve seen various recipes that involve boiling the part in water in the microwave for up to 2 hours at various cycles, but I don’t really know exactly what is going on here, nor have I tried it myself.