Y15 U71152 - GB /T 8731-2008

Grade	Y15
China ISC	U71152
Corresponding Standard	GB /T 8731-2008 Free-Cutting Structural Steel
Classification	Carbon Steel
Properties	Good Machinability

Y15 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.1	-	0.8	0.05	0.23
Maximum Value	0.18	0.15	1.2	0.1	0.33

Y15 Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
d=20 (Sample Diameter)	Hot Rolled Delivery Condition	390~540	≥22	≥36	≤170
d = 8~20 (steel size)	Cold Drawn State Delivery	530~755	≥7		152~217
d > 20 ~ 30 (steel size)	Cold Drawn State Delivery	510~735	≥7		152~217
d > 30 (steel size)	Cold Drawn State Delivery	490~685	≥7		152~217

New and Old Grade Replacement List

1 Approximate Comparison Table Free-Cutting Structural Steel

China		Japan	United States	International Organization for Standardization	Germany		France
GB	ISC	JIS	ASTM/AISI	ISO	DIN EN/DIN	W-Nr.	NF EN/NF
Y15	U71152	SUM22	1213	11SMn28	15S20	1.0723	15F2

2 Approximate Comparison Table Free-Cutting Structural Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard
GB	JIS	SAE	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade
Y15	SUM22	1215	11SMn30	9SMn28	S250	11SMn30	1.0715

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