As might be implied by one passage of the "Magic and metals"-section of the "Magic"-article in the Compendium, Sartal is actually very susceptible to enchanting.
[QUOTE=The Compendium]It should be noted that Sartal, although an alloy rather than an element, has a magical resistance almost comparable to that of silver, though the vast majority of its resistance comes from absorbtion rather than reflection.[/QUOTE]
The downside is that it, while it accepts magic into itself unusually willingly, it is also rather reluctant to let go of it again, so any enchantment that can be placed upon the metal almost never affect anything but the metal itself.