CC21K A5Si - JIS G 7401-2000

Grade	CC21K
Old Grade
Corresponding Standard	JIS G 7401-2000 Steels for cold heading and cold extruding
Classification	Carbon Steel

CC21K Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.18	0.15	0.3	-	-
Maximum Value	0.23	0.35	0.6	0.04	0.04

CC21K Mechanical Properties

Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %
U or P	≤580	≥45

U-untreated with hot-rolled surface；P-untreated with peeled surface；C-cold drawn；AC-annealed to achive spheroidization of the carbides；AC+P-annealed to achive spheroidization of the carbides and peeled；C+AC-cold drawn and annealed to achive spheroidization of the carbides；C+AC+LC-cold drawn and annealed to achive spheroidization of the carbides, and lightly cold reduced (e.g. with a reduction of 5%)

CC21K Corresponding Standards(Same grade name, different standards)

1	JIS G 7401-2000
	CC21K (A5Si)
2	ISO 4954-1993
	CC21K (A5Si)

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