Osmium,  · Osmium is a metal added by GregTech 5. AgriCraft adds an Osmium nugget. As added by Mekanism Osmium is one of three basic metals in Mekanism. It is mainly used for crafting Basic Control Circuit and Gas Tank. It can also be used to craft Osmium tools andSteel,  · 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.