[Chemical name] Steel [Chemical formula] Fe alloyed with C and depending on type, possibly also Ni, B, V, Cr among others [Common or alternative name] Galvanised wire, nail (fasteners), stainless steel, ball bearings, steel wool [Source and description] 
Steel, although commonly used in industry and construction, is often unavailable in pure form (other than a few types such of mild steel, galvanised steel, stainless steel and carbon steel that are used for amateur metalworking) to amateur scientists. Otherwise, they will have to make do with galvanised or stainless steel materials such as nails, screws, tools, cutlery, steel wool, ball bearings, steel girders and steel wire. Due to the variety of steel types, carbon content will widely vary and can contain many other elements such as Nickel, Vanadium, Chromium, Silicon, Boron, Zinc, Aluminium, Titanium, Manganese, Tungsten; these alloys all have different names and are sporadically available in different areas and retailers. Steel of various types can also be plated with Zinc or Tin to prevent corrosion or Gold to make it look precious