ML42CrMo - GB /T 5953.1-2009

ML42CrMo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo
Minimum Value	0.38	-	0.6	-	-	0.9	0.15
Maximum Value	0.45	0.3	0.9	0.035	0.035	1.2	0.25

ML42CrMo Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %	Hardness HBW
d≤6	SALD	590~790	≥50
6＜d≤12	SALD	560~760	≥50
12＜d≤25	SALD	540~690	≥50	HRB ≤95
d≤25	SA	480~730	≥55	HRB ≤97

1 Approximate Comparison Table Cold Heading Steel

China		United States		International Organization for Standardization	Germany		France
GB	ISC	ASTM/AISI	UNS	ISO	DIN EN/DIN	W-Nr.	NF EN/NF
ML42CrMo	A30424	4140 A320ML7M	G41400	42CrMo4E (C32)	42CrMo4	1.7225	42CD4

2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China	Japan	United States	International Organization for Standardization	Germany
GB	JIS	ASTM/AISI	ISO	DIN EN/DIN
ML42CrMo	SCM440	4140	42CrMo4E	42CrMo4

ML42CrMo 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"!