Piano Wire

Piano wire is heat-treated high-carbon steel. It is made with many light drafts to produce a high tensile, durable wire with a bright, lustrous, smooth finish. There are two types of piano wire: bass wire, which is used for the core of wrapped piano bass strings; and treble wire, which is a higher tensile strength wire used for the treble strings. This type of wire was once used for light, high duty springs, since replaced by music spring wire (see entry).