Piano wires (SWPA, SWPB)

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keyword: piano wire; SWPA; SWPB; characteristics of materials

Question 大谷 2007/2/7(Wed) 9:31

I would like to know the material properties (elastic modulus, Poisson’s ratio, rigidity modulus, density, tensile strength, etc.) of piano wires (SWPA, SWPB). Thank you.

Answer Tokai Spring 2007/2/7(Wed) 10:31

Thank you for your inquiry, Otani!

The material properties of SWP-A and SWP-B are as follows.
Elastic modulus (longitudinal elastic modulus): 206000 N/mm2
Poisson’s ratio: 0.3
Rigidity modulus (lateral elastic modulus): 78500 N/mm2
Density: 7.85 g/cm3
Tensile strength: The value changes depending on the wire diameter (See JIS G 3522)

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