Are All Tailpieces the Same?

[banjo1]

I just checked the base of the tailpiece ( cheap nickle plated)on my mandolin and a magnet will stick to it.

Are all tailpiece bases of this type a steel or tin?

Are there tailpiece bases that are brass?

Is there a large difference in the tonal, and volume response between the two?

[Greenmando]

All of the Gibsons are steel.
None are made of tin, tin is so soft you could never bring even your G string to tune without ripping up the post.
Yes, there are brass tailpieces but they are cast. Also considered bronze.
Opinions differ, and each mandolin can react differently between tailpieces.

[Michael Lewis]

Used to see some brass Gibson style tailpieces from time to time. Steel bases have generlly replaced brass so the "hooks" don't rip out.