Important Terms to Know About Sheet Metal Products An extremely versatile material, sheet metal is used by construction workers, fabricators and roofers to create anything from gutters to air ducts. It’s easily bent, can vary in thickness and can easily be stacked flat. Consider these important terms about sheet metal products:
Rolling: A metal forming process involving passing metal through a pair of rolls, classified according to the temperature of the metal. Hot rolling occurs when the metal is above its recrystallization temperature. Cold rolling occurs when the metal is below its recrystallization temperature.
Roll Slitter: A tool to cut a large roll of metal material into narrower rolls. This term harks back to the days of saw mills when operators used saws to cut rods into smaller pieces.
Punching: A process that involves placing sheet metal between a press-mounted punch and die made of hardened steel. The press pushes the punch into the die through excessive force, making a hole in the metal. Progressive stamping involves a coil of stock fed into a long die/punch set to make multiple simple shaped holes.
Metal Leaf: Also known as composition leaf, this is a thin decorative foil which may resemble a gold leaf without the actual gold, called an imitation leaf. Such leaves can be comprised of silver, copper, brass, aluminum or palladium.
Curling: A process used in sheet metal forming that forms edges into a hollow ring, with the purpose of reducing sharp edges and boosting inertia near the end that is curled. Door hinges are good examples of curled metal.