This product is familiar in many forms. Most of the so-called sheet iron of to-day is sheet steel and not wrought iron as it was before the days of mild steel. This sheet steel for common uses is a very soft grade of mild steel, very pliable and easily worked. It is much used by the tinsmith and is the stock material for the sheet-metal-shaping trades and manufacturers. It is familiarly seen made up as stove pipes, steam-pipe lagging protectors, oil guards, etc., and is either of dull surface presenting faint waves of color due to annealing, or is shiny black.

The dull black sheets may be marketed either as such or in the following forms: (1) Crimped into corrugated iron, much used for covering warehouses or other buildings; (2) coated with zinc and known as galvanized iron; (3) coated with tin and known as tin; and (4) planished with carbon and called planished or Russia iron.