40CrNi - GJB 1220A-2008

Grade	40CrNi
Corresponding Standard	GJB 1220A-2008 Speification for alloy structure steel bar for artillery parts
Classification	Alloy Steel

40CrNi Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.37	0.17	0.5	-	-	0.45	1	-
Maximum Value	0.44	0.37	0.8	0.03	0.03	0.75	1.4	0.25

40CrNi Mechanical Properties

diameter d mm	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	Impact Energy Absorption KV2 J
d=25	820°C quenching, oil cooling, 500°C tempering, water or oil cooling	≥980	≥785	≥10	≥45	-	KU2 ≥55
Steel	Annealing or Tempering	-	-	-	-	≤241	-

40CrNi 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"!