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Comparison Between JIS and Corresponding Foreign Standards for Materials (Carbon Steel for Mechanical Structures and Steel Alloy for Structures)

Japanese Industrial Standards (JIS)		International Standards	Overseas Standards
Standard No. Name	JIS	ISO	USA AISI	Germany DIN	UK BS
JIS G 4051 Carbon Steels for Machine Structural Use	S10C	C10	1010	C10E C10R	C10 C10E C10R
	S12C	-	1012	-	-
	S15C	C15E4 C15M2	1015	C15E C15R	C15 C15E C15R
	S17C	-	1017	-	-
	S20C	-	1020	C22 C22E C22R	C22 C22E C22R
	S22C	-	1023	-	-
	S25C	C25 C25E4 C25M2	1025	C25 C25E C25R	C25 C25E C25R
	S28C	-	1029	-	-
	S30C	C30 C30E4 C30M2	1030	C30 C30E C30R	C30 C30E C30R
	S35C	C35 C35E4 C35M2	1035	C35 C35E C35R	C35 C35E C35R
	S38C	-	1038	-	-
	S40C	C40 C40E4 C40M2	1039 1040	C40 C40E C40R	C40 C40E C40R
	S43C	-	1042 1043	-	-
	S45C	C45 C45E4 C45M2	1045 1046	C45 C45E C45R	C45 C45E C45R
	S50C	C50 C50E4 C50M2	1050	C50 C50E C50R	C50 C50E C50R
	S53C	-	1053	-	-
	S55C	C55 C55E4 C55M2	1060	C55 C55E C55R	C55 C55E C55R
	S58C	C60 C60E4 C60M2	1059	C60 C60E C60R	C60 C60E C60R
	S09CX	-	-	C10E	045A10 045M10
	S15CK	-	-	C15E C15R	-
JIS G 4052 Structural Steels With Specified Hardenability Bands (H Steel)	SMn420H	22Mn6H	1522H	-	-
	SMn438H	36Mn6H	1541H	-	-
	SCr415H	-	-	17Cr3 17CrS3	-
	SCr420H	20Cr4H 20CrS4	5120H	-	-
	SCr430H	34Cr4 34CrS4	5130H 5132H	34Cr4 34CrS4	34Cr4 34CrS4
	SCr435H	37Cr4 37CrS4	5135H	37Cr4 37CrS4	37Cr4 37CrS4
	SCr440H	41Cr4 41CrS4	5140H	41Cr4 41CrS4	41Cr4 41CrS4
	SCM418H	18CrMo4 18CrMoS4	-	18CrMo4 18CrMoS4	18CrMo4 18CrMoS4
	SCM435H	34CrMo4 34CrMoS4	4135H 4137H	34CrMo4 34CrMoS4	34CrMo4 34CrMoS4
	SCM440H	42CrMo4 42CrMoS4	4140H 4142H	42CrMo4 42CrMoS4	42CrMo4 42CrMoS4
	SCM445H	-	4145H	-	-
	SNC815H	15NiCr13	-	15NiCr13	15NiCr13
	SNCM220H	20NiCrMo2 20NiCrMoS2	8617H 8620H 8622H	20NiCrMo2-2 20NiCrMoS2-2	20NiCrMo2-2 20NiCrMoS2-2
	SNCM420H	-	4320H	-	-
JIS G 4053 Low-Alloyed Steels for Machine Structural Use	SMn420	22Mn6	1522	-	-
	SMn433	-	1534	-	-
	SMn438	36Mn6	1541	-	-
	SMn443	42Mn6	1541	-	-
	SNC815	15NiCr13	-	15NiCr13	15NiCr13
	SNCM220	20NiCrMo2 20NiCrMoS2	8615 8617 8620 8622	20NiCrMo2-2 20NiCrMoS2-2	20NiCrMo2-2 20NiCrMoS2-2
	SNCM240	41CrNiMo2 41CrNiMoS2	8637 8640	-	-
	SNCM420	-	4320	-	-
	SNCM439	-	4340	-	-
	SCr415	-	-	17Cr3 17CrS3	17Cr3 17CrS3
	SCr420	20Cr4 20CrS4	5120	-	-
	SCr430	34Cr4 34CrS4	5130 5132	34Cr4 34CrS4	34Cr4 34CrS4
	SCr435	37Cr4 37CrS4	5135	37Cr4 37CrS4	37Cr4 37CrS4
	SCr440	41Cr4 41CrS4	5140	41Cr4 41CrS4	41Cr4 41CrS4
	SCM418	18CrMo4 18CrMoS4	-	18CrMo4 18CrMoS4	18CrMo4 18CrMoS4
	SCM430	-	4130	-	-
	SCM435	34CrMo4 34CrMoS4	4135 4137	34CrMo4 34CrMoS4	34CrMo4 34CrMoS4
	SCM440	42CrMo4 42CrMoS4	4140 4142	42CrMo4 42CrMoS4	42CrMo4 42CrMoS4
	SCM445	-	4145 4147	-	-

ISO: International Organization for Standardization

AISI: American Iron and Steel Institute

BS: British Standard

DIN: Deutsche Industrie Normen

Notes

*Steel grades not included in JIS standards are not listed.
Steel grades that are included in JIS standards but not considered for comparison are not listed.
*The comparative steel grades listed here are for reference only.
Note that the chemical compositions of these grades may differ during actual use.