A Hellforge is a crafting station that incorporates the same functions as a regular Furnace with the additional bonus of being able to smelt Hellstone into Hellstone Bars. It is also used to craft the essential Adamantite/Titanium Forge in Hardmode, making it a direct upgrade to the normal Furnace.
It is found in The Underworld and can be moved above ground. Hellforges in the Underworld require a 60% power pickaxe (Nightmare Pickaxe or Deathbringer Pickaxe) or better, or by destroying the blocks below it, which is the only way to obtain Hellforges if you don't have a strong enough pickaxe yet. Hellforges above the Underground layer can be moved with any pickaxe.
 Used in
 Used to craft
- Hellforges are commonly used to drain a large body of water or even oceans. To do so you have to dig a small hole (3 blocks wide, 4 blocks deep) under water and then close the ceiling. After that you need to drain the small hole of water, place a Hellforge at the bottom and pour a bucket of lava on it. Then you can destroy the ceiling to let the water drain. This is because the Hellforge prevents it from forming obsidian, so the water disappears. As of 1.2.3 this trick no longer works.
- The sprite seems to have a temperature gauge on the right side
- 1.2.3: Using Hellforge to drain water no longer works.
- 1.2: Now require a pickaxe instead of a hammer to be moved. Has a new sprite.
- Console-Release: Hellforges are now found in The Underworld.
- 1.0.4: Hellforges above the rock layer can be moved with any Hammer, but below require a 60% power hammer or stronger.
- Pre-Release: Introduced.