12CrNi3A - GJB 1220A-2008

Grade	12CrNi3A
Corresponding Standard	GJB 1220A-2008 Speification for alloy structure steel bar for artillery parts
Classification	Alloy Steel

12CrNi3A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.11	0.17	0.3	-	-	0.6	2.75	-
Maximum Value	0.17	0.37	0.6	0.025	0.025	0.9	3.15	0.25

12CrNi3A 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=15	860°C First Quenching, 780°C Second Quenching, Water Cooling, 200°C Tempering, Water or Air Cooling	≥930	≥685	≥11	≥50	-	KU2 ≥71
Steel	Annealing or Tempering	-	-	-	-	≤217	-

12CrNi3A Corresponding Standards(Same grade name, different standards)

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