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