ML40Cr U20404 - GB /T 6478-2015

Grade	ML40Cr
China ISC	U20404
Corresponding Standard	GB /T 6478-2015 Steels for Cold Heading and Cold Extruding
Classification	Carbon Steel
Properties	Good Forgability

ML40Cr Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr
Minimum Value	0.38	0.1	0.6	-	-	0.9
Maximum Value	0.43	0.3	0.9	0.025	0.025	1.2

ML40Cr Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
5(12)≤d≤60(100)	Annealing	≤620			≥58
d=25 (sample diameter)	Quenching temperature 820~860°C oil or water quenching, tempering temperature 540~680°C	≥900	≥660	≥11

1 Approximate Comparison Table Cold Heading Steel

China		United States		International Organization for Standardization	Germany		France	Russia	United Kingdom
GB	ISC	ASTM/AISI	UNS	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	GOST	BS EN/BS
ML40Cr	A20404	5140	G51400	41Cr4E (C16)	41Cr4	1.7035	38C4 42C4	40Х	3/2

2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China		Japan	United States	International Organization for Standardization	European Standard
YB	GB	JIS	ASTM	ISO	EN
QML40Cr	ML40Cr	SCr440	5140	41Cr4	41Cr4

ML40Cr 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"!