ML20Cr A20204 - GB T 6478-2001

Grade	ML20Cr
China ISC	A20204
Corresponding Standard	GB T 6478-2001 Steels for cold heading and cold extruding
Classification	Alloy Steel

ML20Cr Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni ^*	Cu ^*	Al ^ⓐ
Minimum Value	0.17	-	0.6	-	-	0.9	-	-	0.02
Maximum Value	0.23	0.3	0.9	0.035	0.035	1.2	0.2	0.2	-

①By agreement between the supplier and the purchaser, other grades of cold heading and cold extrusion steel may be supplied.
②Permissible deviations in the chemical composition of the steel shall comply with the relevant provisions of GB/T 222-1984.

ML20Cr Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
Steel	Annealing	≤560			≥60
Sample diameter d=25	Heat Treatment	750~1100	≥490	≥9

Approximate Comparison Table Cold Heading Steel

China		United States		International Organization for Standardization	Russia
GB	ISC	ASTM/AISI	UNS	ISO	GOST
ML20Cr	A20204	5120	G51200	20Cr4E (B10)	20Х

ML20Cr Corresponding Standards(Same grade name, different standards)

1	GB T 6478-2001
	ML20Cr A20204
2	GB /T 6478-2015
	ML20Cr A20204
3	GB /T 28906-2012
	ML20Cr A20204
4	GB /T 5953.1-2009
	ML20Cr
5	Q/ASB 234-2018
	ML20Cr
6	Q/OHAB 113-2020
	ML20Cr

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