FlametalPick it up to discover it.
Asksvin HidePick it up to discover it.
Charred BonePick it up to discover it.
Black ForgeDiscover and use at level 3 or higher.
Discovery is separate from having enough materials to craft. Check shelter, fire, placement, and station access in-game. This checklist cannot diagnose broken mods or save files. Each alternative recipe is listed separately.