In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
Yes, wearing a chain, regardless of its size or metal composition is impermissible for men. [i]
This is because chains, necklaces, and earrings are for the beautification of women, and it is not allowed for men to imitate women or vice-versa [ii]:
“The Messenger of Allah (salallahu alayhi wa sallam) cursed those men
who imitate women and those women that imitate men.”
And Allah Ta’āla Knows Best