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Home Material GB /T 8731-2008
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Grade Y12Pb
China ISC U72122
Corresponding Standard GB /T 8731-2008
Free-Cutting Structural Steel
Classification Carbon Steel
Y12Pb Chemical Element Composition Content (%)
Component C Si Mn P S Pb
Minimum Value - - 0.85 0.04 0.26 0.15
Maximum Value 0.15 0.15 1.15 0.09 0.35 0.35
Y12Pb 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 360~570 ≥22 ≥36 ≤170
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
Approximate Comparison Table Free-Cutting Structural Steel
China United States International Organization for Standardization Germany France
GB ISC ASTM/AISI ISO DIN EN/DIN W-Nr. NF EN/NF
Y12Pb U72122 11L08 11SMnPb28 10SPb20 1.0722 10PbF2

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!