Y08MnS L20087 - GB /T 8731-2025

Grade	Y08MnS
China ISC	L20087
Corresponding Standard	GB /T 8731-2025 Free-Cutting Structural Steels
Classification	Alloy Steel
Properties	Good Machinability

Y08MnS Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	-	-	1	0.04	0.25
Maximum Value	0.09	0.15	1.5	0.09	0.5

Y08MnS 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	480~810	≥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

New and Old Grade Replacement List

Y08MnS 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"!