alloy project piano wire - weebly
TRANSCRIPT
1085 SteelPiano Wire
History of the Piano
Bartolomeo CristoforiEarly 1700s
History of the Piano
Harpsichord before the Piano
History of the Piano
Industrial Revolutionintroduced high
quality steel
History of the Piano
From 5 to 7 octaves
Tuning a Piano170 lbs tension
per string
Chemical Composition
Iron97.98-98.41%Base material
Chemical Composition
Carbon0.8-0.93%
Adds Strength
Chemical Composition
Manganese0.7-1.0%
Solid solubility hardening
Chemical Composition
Phosphorus0.04% max
Trace element
Chemical Composition
Sulfur0.05% max
Trace Material
Mechanical Properties
Tensile Strength393 ksi
Deals with tension
Mechanical Properties
Yield Strength78 ksi
Deals with Elasticity
Mechanical Properties
Hardness587-614 BHN80-83 Ra58-63 Rc
Mechanical Properties
StressApprox 228.6 lbs/mm
Mechanical Properties
Fatigue Resistance 10⁷ cycles
Other Properties
Elasticity190-210 GPa
Other PropertiesPhase Diagram
1085 steel
Manufacturing ProcessesPiano Wire Process
Manufacturing ProcessesPatenting
Piano Action- Complex lever system- Hammer hits string- String vibrates- Vibrations is transferred to soundboard via bridge
Physics of SoundSound is a waveSound is produced by the string and soundboard vibrating
Higher sounds are caused by more frequencyLouder Sounds are produced by higher amplitude
