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	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

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

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"!