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Hard steel wire types and chemical composition

Technical data on types and chemical compositions of hard steel wire rods. There are 21 types of hard steel wire rods in total. The chemical composition of each wire is listed. From these wires, hard steel wire type A (SW-A), hard steel wire type B (SW-B), and hard steel wire type C (SW-C) are produced.

Related standards include "JIS G 3506 Hard Steel Wire" and "JIS G 3521 Hard Steel Wire".

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Hard steel wire rod types and chemical composition table

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

Kind symbol	C.	Si	Mn	P.	S.	Cu
SWRH27	0.24 to 0.31	0.15 to 0.35	0.30 to 0.60	0.040 or less	0.040 or less	―
SWRH32	0.29 to 0.36	0.15 to 0.35	0.30 to 0.60	0.040 or less	0.040 or less	―
SWRH37	0.34 to 0.41	0.15 to 0.35	0.30 to 0.60	0.040 or less	0.040 or less	―
SWRH42A	0.39 to 0.46	0.15 to 0.35	0.30 to 0.60	0.040 or less	0.040 or less	―
SWRH42B	0.39 to 0.46	0.15 to 0.35	0.60 to 0.90	0.040 or less	0.040 or less	―
SWRH47A	0.44 to 0.51	0.15 to 0.35	0.30 to 0.60	0.040 or less	0.040 or less	―
SWRH47B	0.44 to 0.51	0.15 to 0.35	0.60 to 0.90	0.040 or less	0.040 or less	―
SWRH52A	0.49 to 0.56	0.15 to 0.35	0.30 to 0.60	0.040 or less	0.040 or less	―
SWRH52B	0.49 to 0.56	0.15 to 0.35	0.60 to 0.90	0.040 or less	0.040 or less	―
SWRH57A	0.54 to 0.61	0.15 to 0.35	0.30 to 0.60	0.040 or less	0.040 or less	―
SWRH57B	0.54 to 0.61	0.15 to 0.35	0.60 to 0.90	0.040 or less	0.040 or less	―
SWRH62A	0.59 to 0.66	0.15 to 0.35	0.30 to 0.60	0.040 or less	0.040 or less	―
SWRH62B	0.59 to 0.66	0.15 to 0.35	0.60 to 0.90	0.040 or less	0.040 or less	―
SWRH67A	0.64 to 0.71	0.15 to 0.35	0.30 to 0.60	0.030 or less	0.030 or less	―
SWRH67B	0.64 to 0.71	0.15 to 0.35	0.60 to 0.90	0.030 or less	0.030 or less	―
SWRH72A	0.69 to 0.76	0.15 to 0.35	0.30 to 0.60	0.030 or less	0.030 or less	―
SWRH72B	0.69 to 0.76	0.15 to 0.35	0.60 to 0.90	0.030 or less	0.030 or less	―
SWRH77A	0.74 to 0.81	0.15 to 0.35	0.30 to 0.60	0.030 or less	0.030 or less	―
SWRH77B	0.74 to 0.81	0.15 to 0.35	0.60 to 0.90	0.030 or less	0.030 or less	―
SWRH82A	0.79 to 0.86	0.15 to 0.35	0.30 to 0.60	0.030 or less	0.030 or less	―
SWRH82B	0.79 to 0.86	0.15 to 0.35	0.60 to 0.90	0.030 or less	0.030 or less	―