ML20MnTiB A74204 - GB T 6478-2001

Grade	ML20MnTiB
China ISC	A74204
Corresponding Standard	GB T 6478-2001 Steels for cold heading and cold extruding
Classification	Alloy Steel

ML20MnTiB Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni ^*	Cu ^*	Ti	B	Al ^ⓐ
Minimum Value	0.19	-	1.3	-	-	-	-	-	0.04	0.0005	0.02
Maximum Value	0.24	0.3	1.6	0.035	0.035	0.2	0.2	0.2	0.1	0.0035	-

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.

ⓐ Total aluminum content. The content of acid-soluble aluminum measured is not less than 0.015%, which should be considered to meet this standard.
* Residual element content

ML20MnTiB 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 %
Sample diameter d=25	quenched 840~880°C oil cooling, tempered 180~220°C	≥1130	≥930	≥10	≥45

ML20MnTiB Corresponding Standards(Same grade name, different standards)

1	GB T 6478-2001
	ML20MnTiB A74204
2	GB /T 6478-2015
	ML20MnTiB A74204
3	Q/BQB 517-2018
	ML20MnTiB
4	GB /T 28906-2012
	ML20MnTiB A74204
5	GB /T 5953.1-2009
	ML20MnTiB
6	Q/ASB 234-2018
	ML20MnTiB
7	Q/OHAB 113-2020
	ML20MnTiB

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