4120 G41200 - ASTM A 29/A 29M-05

Grade	4120
USA UNS	G41200
Corresponding Standard	ASTM A29/A29M-2005 General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
Classification	Alloy Steel

4120 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu	Mo	Al
Minimum Value	0.18	0.15	0.9	-	-	0.4	-	0.13	-
Maximum Value	0.23	0.35	1.2	0.035	0.04	0.6	0.3	0.2	0.05

Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China	Japan	United States	International Organization for Standardization
GB	JIS	ASTM	ISO
ML20CrMo	SCM420	4120	20CrMo4

4120 Corresponding Standards(Same grade name, different standards)

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