From Starbounder - Starbound Wiki
The forge is used to produce armour and weapons from fabric and ores.
Forge is a the second tier crafting station for creating weapons and armor.
This station is the upgraded version of Anvil, and can be further upgraded to Replicator to unlock additional schematics and change its appearance.
In addition to access to all schematics made with the Anvil, there are a number only unlocked once the station has been upgraded. For a list of recipes that are specific to the Forge, see Forge/Recipes.
Station Upgrade Stages
|STAGE 1||STAGE 2||STAGE 3|
|Apex :||An anvil. The Apex haven't used these for metalwork for a long, long time.|
|Avian :||A large slab of iron with a flat surface.|
|Floran :||Very heavy, usseful in a trap.|
|Glitch :||Proud. The Glitch craft all sorts of weapons on these anvils. They even craft anvils on these anvils.|
|Human :||An anvil. Humans haven't used these since early in our history.|
|Hylotl :||Probably used in metal work.|
|Novakid :||An anvil. I'm no stranger to these.|
- Cheerful Giraffe: Added (replaced Metalwork Station)