Molten Ingots are obtained when one puts an Iron Ingot in a Lava Furnace and takes it out before it is completely cooled into a Steel Ingot. They are part of the Nether Expansion idea pack. Molten Ingots can be used to craft Netherchain Armor and Molten Blades.
How to obtain
- Take an uncooled Steel Ingot out of a Lava Furnace