F568M Class 10.9.3 A - ASTM F568M-2007

Grade	F568M Class 10.9.3 A
Corresponding Standard	ASTM F568M-2007 Carbon and Alloy Steel Externally Threaded Metric Fasteners
Classification	Alloy Steel

F568M Class 10.9.3 A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.33	0.15	0.9	-	-	0.45	0.25	0.25
Maximum Value	0.4	0.35	1.2	0.04	0.05	0.65	0.45	0.45

F568M Class 10.9.3 A Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
Quenching + Tempering, Minimum Tempering Temperature 425℃	≥1040	≥940	≥9	≥35	HRC 33~39

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