12CrNi3A - GJB 1951-1994

Grade	12CrNi3A
Corresponding Standard	GJB 1951-1994 Specification for quality structure steel bars for avication
Classification	Alloy Steel

12CrNi3A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^*	Mo ^*	Ti ^*	W ^*	V ^*
Minimum Value	0.1	0.17	0.3	-	-	0.6	2.75	-	-	-	-	-
Maximum Value	0.16	0.37	0.6	0.03	0.03	0.9	3.25	0.25	0.15	0.03	0.2	0.05

12CrNi3A Mechanical Properties

condition	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
Steel Rod	Tempering or annealing					143~229
Longitudinal specimen d=16①	Single quenching 860±10°C oil quenching, secondary quenching 780~810°C oil quenching, tempering 150~170°C air cooling	≥980	≥685	≥11	≥55	269~388	≥86
Longitudinal specimen d=16①	Single quenching 860±10°C oil quenching, secondary quenching 780~810°C oil quenching, tempering 150~170°C air cooling	≥885	≥635	≥12	≥55	262~363	≥94
Longitudinal sample d=16②	First quenching 860±10°C oil quenching, second quenching 780~810°C oil quenching, tempering 150~170°C water or air cooling	≥885	≥635	≥10	≥45	262~363	≥86

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

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