20CrA - GJB 1951-1994

Grade	20CrA
Corresponding Standard	GJB 1951-1994 Specification for quality structure steel bars for avication
Classification	Alloy Steel

20CrA Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^*	Mo ^*	Ti ^*	W ^*	V ^*
Minimum Value	0.18	0.17	0.5	-	-	0.7	-	-	-	-	-	-
Maximum Value	0.24	0.37	0.8	0.03	0.03	1	0.3	0.25	0.15	0.03	0.2	0.05

20CrA 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	Annealing or Tempering					≤179
Longitudinal specimen d=16①	First quenching 880±10°C, second quenching 780~820°C water or oil quenching, tempering 170~230°C water or air cooling	≥835	≥540	≥10	≥40	-	≥47

20CrA Corresponding Standards(Same grade name, different standards)

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