Piano wire types and chemical composition for spring｜SPRING MANUFACTURER

Piano wire types and chemical composition

Technical data on piano wire types and chemical compositions. There are 18 types of piano wire in all. The chemical composition of each wire is listed. Piano wire type A (SWP-A), piano wire type B (SWP-B) and piano wire type V (SWP-V) are made from these wires.

Related standards include "JIS G 3502 piano wire" and "JIS G 3522 piano wire".

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Piano wire types and chemical composition table

The chemical composition of piano wire is as follows (unit: mass%).

　Among the 18 types of wire, the most common piano wire is "SWRS82A".

Kind symbol	C.	Si	Mn	P.	S.	Cu
SWRS62A	0.60 to 0.65	0.12 to 0.32	0.30 to 0.60	0.025 or less	0.025 or less	0.20 or less
SWRS62B	0.60 to 0.65	0.12 to 0.32	0.60 to 0.90	0.025 or less	0.025 or less	0.20 or less
SWRS67A	0.65 to 0.70	0.12 to 0.32	0.30 to 0.60	0.025 or less	0.025 or less	0.20 or less
SWRS67B	0.65 to 0.70	0.12 to 0.32	0.60 to 0.90	0.025 or less	0.025 or less	0.20 or less
SWRS72A	0.70 to 0.75	0.12 to 0.32	0.30 to 0.60	0.025 or less	0.025 or less	0.20 or less
SWRS72B	0.70 to 0.75	0.12 to 0.32	0.60 to 0.90	0.025 or less	0.025 or less	0.20 or less
SWRS75A	0.73 to 0.78	0.12 to 0.32	0.30 to 0.60	0.025 or less	0.025 or less	0.20 or less
SWRS75B	0.73 to 0.78	0.12 to 0.32	0.60 to 0.90	0.025 or less	0.025 or less	0.20 or less
SWRS77A	0.75 to 0.80	0.12 to 0.32	0.30 to 0.60	0.025 or less	0.025 or less	0.20 or less
SWRS77B	0.75 to 0.80	0.12 to 0.32	0.60 to 0.90	0.025 or less	0.025 or less	0.20 or less
SWRS80A	0.78-0.83	0.12 to 0.32	0.30 to 0.60	0.025 or less	0.025 or less	0.20 or less
SWRS80B	0.78-0.83	0.12 to 0.32	0.60 to 0.90	0.025 or less	0.025 or less	0.20 or less
SWRS82A	0.80 to 0.85	0.12 to 0.32	0.30 to 0.60	0.025 or less	0.025 or less	0.02 or less
SWRS82B	0.80 to 0.85	0.12 to 0.32	0.60 to 0.90	0.025 or less	0.025 or less	0.20 or less
SWRS87A	0.85 to 0.90	0.12 to 0.32	0.30 to 0.60	0.025 or less	0.025 or less	0.20 or less
SWRS87B	0.85 to 0.90	0.12 to 0.32	0.60 to 0.90	0.025 or less	0.025 or less	0.20 or less
SWRS92A	0.90 to 0.95	0.12 to 0.32	0.30 to 0.60	0.025 or less	0.025 or less	0.20 or less
SWRS92B	0.90 to 0.95	0.12 to 0.32	0.60 to 0.90	0.025 or less	0.025 or less	0.20 or less