PIANO STRINGS
Great for Jewellery and Art!!
For the 88 piano keys on a keyboard, there are about 230 strings:
3 strings per note for tenor and treble notes (longer, thinner steel strings)
2 strings ea for bass notes (shorter, thicker copper wound steel strings)
1 string ea for lowest bass notes (shortest, thickest copper wound strings)
The steel is a tempered high-carbon steel (or “spring steel”), giving a very high tensile strength (2620–2930 MPa ) around to cope with the heavy demands placed upon piano strings
approximately 75% of a string's weight is copper, the rest is the steel core. A piano bass string 1.3m long has 11.8m of copper wound around that core.