Steel is a refined form of Iron added by various mods. IndustrialCraft 2 adds Steel, but it is called Refined Iron. Making Steel requires either the Railcraft or IndustrialCraft Blast Furnace, the Bronze Plated Blast Furnace, the Industrial Blast Furnace, or the High Oven. It is used for tools, armor and some higher tier machines and tools. 1 ArmorPlus Easy Mode Expert Mode Recipes ...