20CrNi - GJB 1220A-2008

Grade	20CrNi
Corresponding Standard	GJB 1220A-2008 Speification for alloy structure steel bar for artillery parts
Classification	Alloy Steel

20CrNi Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.17	0.17	0.4	-	-	0.45	1	-
Maximum Value	0.23	0.37	0.7	0.03	0.03	0.75	1.4	0.25

20CrNi 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	850°C Quenching, Water or Oil Cooling, 460°C Tempering, Water or Oil Cooling	≥785	≥590	≥10	≥50	-	KU2 ≥63
Steel	Annealing or Tempering	-	-	-	-	≤197	-

20CrNi 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"!