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Home Material GB /T 8731-2008
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Grade Y08MnS
China ISC U71088
Corresponding Standard GB /T 8731-2008
Free-Cutting Structural Steel
Classification Carbon Steel
Properties Machinability
Y08MnS Chemical Element Composition Content (%)
Component C Si Mn P S
Minimum Value - - 1 0.04 0.32
Maximum Value 0.09 0.07 1.5 0.09 0.38
Y08MnS Mechanical Properties
diameter
d
mm		 Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW
d=20 (Sample Diameter) Hot Rolled Delivery Condition 350~500 ≥25 ≥40 ≤165
d = 8~20 (steel size) Cold Drawn State Delivery 480~810 ≥7 140~217
d > 20 ~ 30 (steel size) Cold Drawn State Delivery 460~710 ≥7 140~217
d > 30 (steel size) Cold Drawn State Delivery 360~710 ≥7 140~217

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