Wrought iron was actually "wrought" (i.e. worked or hammered) into bars and has been used as a construction material for thousands of years. Most metals used for construction purposes are alloys. For example, steel is an alloy with iron and carbon being the primary elements.

Copper alloys are amongst the easiest metals to cast and bronze is included in this making it an extremely popular choice for both homemade casting and professional needs. Having been practiced for centuries bronze castings have frequently been used throughout history for sculpture making and furniture.

Vacuum Form. Vacuum forming can create many thin, weak molds in a short period of time. Permanent Mold. Permanent molds are often made of steel, iron, silicone or urethane, and Die Casting. Die casting is the preferred method for creating many small castings.

An average commercial steel building costs between $16 and $20 per square foot, including building package (I-Beams, purlins, girts etc.) , delivery, foundation and the cost of construction.