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Home Material GB /T 8731-2008
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Grade Y45Sn
China ISC U74452
Corresponding Standard GB /T 8731-2008
Free-Cutting Structural Steel
Classification Carbon Steel
Y45Sn Chemical Element Composition Content (%)
Component C Si Mn P S Sn
Minimum Value 0.4 - 0.6 0.03 - 0.09
Maximum Value 0.48 0.4 1 0.07 0.05 0.25
Y45Sn 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 600~745 ≥12 ≥26 ≤241
d = 8~20 (steel size) Cold Drawn State Delivery 695~920 ≥6 196~255
d > 20 ~ 30 (steel size) Cold Drawn State Delivery 655~855 ≥6 196~255
d > 30 (steel size) Cold Drawn State Delivery 635~835 ≥6 196~255

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