Iron Bars convert later-tier ruin ore into a workshop-ready material for progression builds.
PC / Global, full release
WHERE & HOW TO FARM
Where to farm
Iron-bearing patches in Abandoned Ruins #2 after story access, then a smelting machine at the Workshop.
Once the story opens Abandoned Ruins #2, gather Iron Ore from its iron-bearing patches and process it in the Workshop. The goal is not simply to fill a machine: match output to a known build or commission, since the ore, fuel, and queue all compete with other production. Use the machine interface for its specific recipe and requirements.