Y08Pb U72081 - GB /T 8731-2025

Grade	Y08Pb
China ISC	U72081
Corresponding Standard	GB /T 8731-2025 Free-Cutting Structural Steels
Classification	Carbon Steel

Y08Pb Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Pb
Minimum Value	-	-	0.75	0.04	0.26	0.15
Maximum Value	0.09	0.15	1.05	0.09	0.35	0.35

Y08Pb 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	480~810	≥7	140~217
20＜d≤30 (nominal size)	Cold Drawn	460~710	≥7	140~217
d > 30 (nominal size)	Cold Drawn	360~710	≥7	140~217

Approximate Comparison Table Free-Cutting Structural Steel

Y08Pb 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"!