ML40 - GB /T 5953.1-2009

Grade	ML40
Corresponding Standard	GB /T 5953.1-2009 Steel Wire for Cold Heading and Cold Forging— Part 1: Intended for Heat Treatment
Classification	Carbon Steel

ML40 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.38	0.1	0.6	-	-
Maximum Value	0.43	0.3	0.9	0.025	0.025

ML40 Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %	Hardness HBW
d≤6	SALD	550~730	≥55
6＜d≤12	SALD	500~670	≥55
12＜d≤25	SALD	450~600	≥50	HRB ≤89
d≤25	SA	430~580	≥60	HRB ≤87

Approximate Comparison Table Cold Heading Steel

China		Taiwan, China	Japan	South Korea	United States		International Organization for Standardization	France	Russia	United Kingdom
GB	ISC	CNS	JIS	KS	ASTM/AISI	UNS	ISO	NF EN/NF	GOST	BS EN/BS
ML40	U40402	SWRCH40K	SWRCH40K	SWRCH40K	1040	G10400	CE40E4	XC40 FR38	40	1/3

ML40 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"!