Fiery Steel, also known as Fiery, is a material that originates from Twilight Forest.
Flaxbeard's Steam Power
Flaxbeard's Steam Power only adds the plate variation of the Fiery material. The Fiery Plate can be created by throwing Fiery Ingots into a heated Crucible, and then pouring that molten metal into a Mold with a Plate Mold. Six nuggets are used in the creation of a Plate, which makes it unable to be used in other mod's recipes requiring their own Fiery Plates.