Steel is an item in Survival 303.
Steel is a metal alloy that is comprised of refined iron and coal, giving it a more durable structure than just iron alone. When combined at a quality design table, refined iron and coal form a powdery steel mix which must be smelted once more to produce a usable piece of refined steel.
Because of its strength, steel is used in a wide variety of applications, ranging from steel tooling necessary to mine mithril and chromite to more advanced structures such as chests and steel workshops. It is also the first metal that can be combined with flint to make flint and steel, a better fire starting tool. Most notably however, steel can be combined with chromium to form stainless steel which unlocks access to the stainless workshop, smeltery, and bluesteel production.