Y15Pb U72151 - GB /T 8731-2025

Grade	Y15Pb
China ISC	U72151
Corresponding Standard	GB /T 8731-2025 Free-Cutting Structural Steels
Classification	Carbon Steel

Y15Pb Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Pb
Minimum Value	0.1	-	0.8	0.04	0.23	0.15
Maximum Value	0.18	0.15	1.2	0.09	0.33	0.35

Y15Pb Mechanical Properties

diameter d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Hardness HBW
d≤20 (Sample Diameter)	Hot Rolled (forged）	360~570		≤169
8＜d≤20 (nominal size)	Cold Drawn	530~755	≥7	152~217
20＜d≤30 (nominal size)	Cold Drawn	510~735	≥7	152~217
d > 30 (nominal size)	Cold Drawn	490~685	≥7	152~217

Approximate Comparison Table Free-Cutting Structural Steel

China		Taiwan, China	Japan	South Korea	United States		International Organization for Standardization	Germany		France	Sweden
GB	ISC	CNS	JIS	KS	ASTM/AISI	UNS	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	SS₁₄
Y15Pb	U72152	SUM22L	SUM22L	SUM22L	12L13	G12134	11SMnPb28	9SMnPb28	1.0718	S250Pb	1914

Y15Pb 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"!