I have the stovetop element shown in the image below. If you look at the coils, they're fixed down by what look like little staples. I'm wondering what material those staples might be. The surface they're stapled into is a bit spongey, so I assume it (the surface) is an insulator, and that therefore it doesn't really matter what material the 'staples' are.
Element is from a Whirlpool stovetop. Image from this link at repairclinic.com