- H2ABC

Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	B
Minimum Value	0.23	0.15	0.8	-	-	0.0005
Maximum Value	0.29	0.35	1.1	0.04	0.05	-

1 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
QML25MnB	ML25MnB	SWRCHB526	15B25	23MnB4	23MnB4

2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China	Japan	United States	International Organization for Standardization	European Standard
GB	JIS	ASTM	ISO	EN
ML25MnB GB/T 28906-2025 GB/T 6478-2015	SWRCHB526 JIS G3058-1-2021	15B25 ASTM A29/A29M-23	23MnB4 ISO 4954-2022	23MnB4 EN 10263-4-2017

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