JIS G4051 CARBON STEEL FOR MACHINE STRCUTURE USE

Symbol	Chemical Composition
Symbol	C	Si	MN	P	S
S10C	0.08~0.13	0.15~0.35	0.30~0.60	0.030 Max	0.035 Max
S12C	0.10~0.15
S15C	0.12~0.18
S17C	0.15~0.20
S20C	0.18~0.23
S22C	0.20~0.25
S25C	0.22~0.28
S28C	0.25~0.31		0.60~0.90
S30C	0.27~0.33
S33C	0.30~0.36
S35C	0.32~0.38
S38C	0.35~0.41
S40C	0.37~0.43
S43C	0.40~0.46
S45C	0.42~0.48
S48C	0.45~0.51
S50C	0.47~0.53
S58C	0.50~0.56
S15C9	0.07~0.12	0.10~0.35	0.30~0.60	0.025 MAX	0.025 MAX
S20CK	0.13~0.18	0.15~0.35
S09CK	0.18~0.23	0.15~0.35

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