31CrNiMo8E C43 - JIS G 7401-2000

Grade	31CrNiMo8E
Old Grade
Corresponding Standard	JIS G 7401-2000 Steels for cold heading and cold extruding
Classification	Alloy Steel

31CrNiMo8E Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo
Minimum Value	0.27	-	0.3	-	-	1.8	1.8	0.3
Maximum Value	0.34	0.4	0.6	0.035	0.035	2.2	2.2	0.5

31CrNiMo8E Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Reduction of Area ψ %
Cold heading steel	AC or AC+P	≤700	≥58
Cold heading steel	C+AC	≤680	≥60
Cold heading steel	C+AC+LC	≤710	≥60

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%)

31CrNiMo8E Corresponding Standards(Same grade name, different standards)

1	JIS G 7401-2000
	31CrNiMo8E (C43)
2	ISO 4954-1993
	31CrNiMo8E (C43)

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