40Cr A20402 - JB /T 6908-2020

Grade	40Cr
	A20402
Corresponding Standard	JB /T 6908-2020 Steel forings for displacement compressors
Classification	Alloy Steel

40Cr Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.37	0.17	0.5	-	-	0.8	-	-
Maximum Value	0.44	0.37	0.8	0.03	0.03	1.1	0.3	0.2

40Cr Mechanical Properties

thickness or diameter mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
≤ 100	Tempering	≥735	≥540	≥15	≥45	241~286	KU2：≥39
＞100~300	Tempering	≥685	≥490	≥14	≥45	241~286	KU2：≥31
＞300~500	Tempering	≥635	≥440	≥10	≥35	229~269	KU2：≥23
＞500~800	Tempering	≥590	≥345	≥8	≥30	217~255	KU2：≥16

40Cr Corresponding Standards(Same grade name, different standards)

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