28B2 1.5510 - EN 10263-4-2001

Grade	28B2
European Standard Steel Grade	1.5510
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

28B2 Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cr ^②	Cu	B
Minimum Value	0.25	-	0.6	-	-	-	-	0.0008
Maximum Value	0.3	0.3	0.9	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	ISO	EN
ML30B GB/T 6478-2015 ML28B GB/T 6478-2001	A70304	SWRCHB 331 JIS G3508-1	10B30 ASTM A29/A29M-12 ASTM A510/A510-13	CE28B ISO 4954-1993	28B2 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
28B2	28B2	1.5510

4 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China	United States	International Organization for Standardization	European Standard
YB	ASTM	ISO	EN
QML28B	10B29	28B2	28B2

5 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China	United States	International Organization for Standardization	European Standard
GB	ASTM	ISO	EN
ML28B GB/T 28906-2025	10B29 ASTM A29/A29M	28B2 ISO 4954-2022	28B2 EN 10263-4-2017

28B2 Corresponding Standards(Same grade name, different standards)

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