20MnB4 1.5525 - EN 10263-4-2001

Grade	20MnB4
European Standard Steel Grade	1.5525
Corresponding Standard	EN 10263-4-2001 Steel Rod, Bars and Wire for Cold Heading and Cold Extrusion - Part 4: Technical Delivery Conditions for Steels for Quenching and Tempering
Classification	Alloy Steel

20MnB4 Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cr ^②	Cu	B
Minimum Value	0.18	-	0.9	-	-	-	-	0.0008
Maximum Value	0.23	0.3	1.2	0.025	0.025	0.3	0.25	0.005

1 Approximate Comparison Table Structural Alloy Steel

2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China		Japan	United States	International Organization for Standardization	European Standard
GB	ISC	JIS	ASTM/AISI	ISO	EN
ML20MnB GB/T 6478-2015 GB/T 6478-2001	A71204	SWRCHB 320 JIS G3508.1-2010	10B22 ASTM A29/A29M-12 ASTM A510/A510M-13	CE20BG2 ISO 4954-1993	20MnB4 EN 10263-4-2001

3 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
20 MnB4	20 MnB4	1.5525

4 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China		Japan	International Organization for Standardization	European Standard
YB	GB	JIS	ISO	EN
QML20MnB	ML20MnB	SWRCHB320	20MnB4	20MnB4

20MnB4 Corresponding Standards(Same grade name, different standards)

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