Y08Sn U74082 - GB /T 8731-2025

Grade	Y08Sn
China ISC	U74082
Corresponding Standard	GB /T 8731-2025 Free-Cutting Structural Steels
Classification	Carbon Steel
Properties	Good Machinability

Y08Sn Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Sn
Minimum Value	-	-	0.75	0.04	0.26	0.09
Maximum Value	0.09	0.15	1.2	0.09	0.4	0.25

Y08Sn 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）	350~500		≤165
8＜d≤20 (nominal size)	Cold Drawn	480~705	≥7.5	140~200
20＜d≤30 (nominal size)	Cold Drawn	460~685	≥7.5	140~200
d > 30 (nominal size)	Cold Drawn	440~635	≥7.5	140~200

Y08Sn 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"!