30Х - GOST 4543-1971

Grade	30Х
Corresponding Standard	GOST 4543-1971 Alloyed Construction Steel Specifications
Classification	Alloy Steel
Properties	High Hardenability

30Х Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.24	0.17	0.5	-	-	0.8	-	-
Maximum Value	0.32	0.37	0.8	0.035	0.035	1.1	0.3	0.3

• The letter A at the end of the grade stands for “high quality steel”. Character III means “Extra high quality steel”. For example, quality steel -30XΓC; High quality steel -30XΓCA; Extra high quality steel -30X ΓC-Ⅲ and 30XΓCA-Ⅲ.

Approximate Comparison Table Structural Alloy Steel

China		Taiwan, China	Japan	South Korea	United States		Germany		France	Russia	United Kingdom
GB	ISC	CNS	JIS	KS	ASTM/AISI	UNS	DIN EN/DIN	W-Nr.	NF EN/NF	GOST	BS EN/BS
30Cr	A20302	SCr430	SCr430	SCr430	5130	G51300	28Cr4	1.7030	32C4	30Х	530A30

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!