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Mechanical Properties
Mark
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW
SCMnM 3A A-Tempering after normalizing ① ≥690 ≥390 ≥13 ≥30 ≥183 HB
SCMnM 3B B-Tempering after quenching ② ≥740 ≥490 ≥13 ≥30 ≥212 HB

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