Iron Nugget

An iron nugget is an item obtained by smelting iron tools, weapons, or iron/chainmail armor.

Smelting
Durability and enchantments do not affect the ability to smelt iron tools, weapons, and armor into iron nuggets.

Bartering
Piglins may barter 9–36 iron nuggets when given a gold ingot.

Usage
Iron nuggets are used to craft iron ingots, lanterns, soul fire lanterns, and chains