20Mn2A - GJB 1951-1994

Grade	20Mn2A
Corresponding Standard	GJB 1951-1994 Specification for Quality Structure Steel Bars for Avication
Classification	Alloy Steel

20Mn2A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^*	Mo ^*	Ti ^*	W ^*	V ^*
Minimum Value	0.17	0.17	1.4	-	-	-	-	-	-	-	-	-
Maximum Value	0.24	0.37	1.8	0.03	0.03	0.3	0.3	0.25	0.15	0.03	0.2	0.05

20Mn2A 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					≤187
Longitudinal specimen d=16①	Quenching 850±10°C water or oil cooling, Tempering 170~230°C water or air cooling	≥785	≥590	≥10	≥40	-	≥47
Longitudinal specimen d=16①	Quenching 880±10°C water or oil cooling, Tempering 390~490°C water or air cooling	≥785	≥590	≥10	≥40		≥47

20Mn2A 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"!