ML28B - GB /T 5953.1-2009

Grade	ML28B
Corresponding Standard	GB /T 5953.1-2009 Steel Wire for Cold Heading and Cold Forging— Part 1: Intended for Heat Treatment
Classification	Alloy Steel

ML28B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	B	Al ^ⓒ
Minimum Value	0.25	-	0.6	-	-	0.0008	0.02
Maximum Value	0.32	0.4	0.9	0.035	0.035	0.0035	-

ML28B Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %	Hardness HBW
d≤25	SALD	≤620	≥55	HRB ≤90
d≤25	SA	≤570	≥65	HRB ≤87

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
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

ML28B Corresponding Standards(Same grade name, different standards)

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