30CrMo - GB /T 44457-2024

Grade	30CrMo
Corresponding Standard	GB /T 44457-2024 Hydrogen Storage Pressure Vessel Used in Hydrogen Refueling Station
Classification	Alloy Steel

30CrMo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	More
Minimum Value	0.26	0.17	0.4	-	-	0.8	-	-	0.15	P+S≤0.02
Maximum Value	0.33	0.37	0.7	0.015	0.008	1.1	0.3	0.2	0.25	P+S≤0.02

• The allowable deviation of the finished product analysis of the chemical composition of seamless steel pipe materials is: P: +0.003%, S: +0.002%, and other elements shall comply with the provisions of GB/T 222. The total mass fraction of alloying elements such as V, Nb, Ti, B and Zr should not exceed 0.15%.

30CrMo Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
quenching and tempering	800~880	ReL ≥520	≥20	-40°C ≥47

1 Approximate Comparison Table Structural Alloy Steel

China		Taiwan, China	Japan	South Korea	United States	France	European Standard
GB	ISC	CNS	JIS	KS	ASTM	NF EN/NF	EN
30CrMo	A30302	SCM430	SCM430	SCM430	4130	30CD4	34CrMo4

2 Approximate Comparison Table Alloy Steel for Quenching and Tempering

China		Japan	International Organization for Standardization	European Standard
GB	ISC	JIS	ISO	EN	Numerical Grade
30CrMo	A30302	SCM425 SCM425H	25CrMo4	25CrMo4	1.7218

3 Approximate Comparison Table Structural Alloy Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	SAE	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
30CrMo	SCM420 SCM430	4130	25CrMo4	25CrMo4	25CD4	25CrMo4	1.7218	20KHM 30KHM 30KHMA	2225	708A25 708M25 CFS10

4 Approximate Comparison Table Structural Alloy Steel

China	United States
GB	ASTM/AISI
30CrMo	A519 Gr4130

30CrMo Corresponding Standards(Same grade name, different standards)

1	GB /T 3077-1999
	30CrMo A30302
2	GB /T 17107-1997
	30CrMo
3	GB /T 3077-2015
	30CrMo A30302
4	GJB 1220A-2008
	30CrMo
5	GB /T 3078-2019
	30CrMo
6	NB /T 47008-2017
	30CrMo
7	GB /T 18248-2021
	30CrMo
8	GB /T 37601-2019
	30CrMo
9	GB /T 44457-2024
	30CrMo

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