SF 390 A SF 40 A - JIS G 3201-1988(R2005) - H2ABC

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Grade	SF 390 A
Other Names
Corresponding Standard	JIS G 3201-1988(R2005) Carbon Steel Forgings for General Use
Classification	Carbon Steel

SF 390 A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	-	0.15	0.3	-	-
Maximum Value	0.6	0.5	1.2	0.03	0.035

SF 390 A Mechanical Properties

form	Mark	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
Forging	SF 40 A②	Annealing, Normalizing or Normalizing + Tempering	392~490	≥196	No. 14 Sample: Axial: ≥25 Tangential: ≥21	Axial: ≥45 Radial: ≥35	≥105ⓐ
Forging	SF 390 A③	Annealing, Normalizing or Normalizing + Tempering	390~490	≥195	No. 14 Sample: Axial: ≥25 Tangential: ≥21	Axial: ≥45 Radial: ≥35	≥105ⓐ

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