ML20B - GB /T 5953.1-2009

Grade	ML20B
Corresponding Standard	GB /T 5953.1-2009 Steel wire for cold heading and cold forging— Part 1: Intended for heat treatment
Classification	Alloy Steel

ML20B Chemical Element Composition Content (%)

Component	C	Si ^ⓐ	Mn	P	S	B ^ⓑ	Al ^ⓒ
Minimum Value	0.18	0.1	0.6	-	-	0.0008	0.02
Maximum Value	0.23	0.3	0.9	0.025	0.025	0.0035	-

ML20B Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %	Hardness HBW
d≤25	SALD	≤600	≥55	HRB ≤89
d≤25	SA	≤550	≥65	HRB ≤85

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
ML20B GB/T 6478-2015 GB/T 6478-2001	A70204	SWRCHB 223 JIS G3508-1	10B21 ASTM A29/A29M-12 ASTM A510/A510-13	CE20BG1 ISO 4954-1993	17B2 EN 10263-4-2001

ML20B 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"!