Iron Ingot

Iron ingots are the metal obtained from the smelting of iron ore. They are used to make a wide variety of items such as iron tools as well as minecarts, minecart tracks, compasses, armor and buckets. Iron tools are capable of mining all blocks that diamond tools can, with the exception of obsidian. This makes it one of the most useful items in-game. Iron tools are considered in the middle-tier level, one tier below diamond tools.

Iron ingots can be obtained from: smelting iron ore, placing blocks of iron into a crafting grid, dungeon, stronghold, abandoned mineshaft and NPC village chests and by killing iron golems and zombies.

As a crafting ingredient
Crafting the Nether Reactor Core requires three diamonds and six iron ingots.

Trivia

 * Just like gold ingots and diamonds, the bottom half of an iron ingot is darker similarly to how the bottom half of an iron block used to be darker. However, this may simply be a coincidence.
 * While Minecraft does distinguish between ores and metals, it does not have a "steel" item separate from iron; flint and steel is crafted directly from an iron ingot.

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