40CrNi2Si2MoVA 300M - GB /T 38809-2020

Grade	40CrNi2Si2MoVA
China ISC	300M
Corresponding Standard	GB /T 38809-2020 General specification for low alloy ultra-high strength steels
Classification	Alloy Steel

40CrNi2Si2MoVA Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V
Minimum Value	0.38	1.45	0.6	-	-	0.7	1.65	-	0.3	0.05
Maximum Value	0.43	1.8	0.9	0.01	0.01	0.95	2	0.2	0.5	0.1

40CrNi2Si2MoVA Mechanical Properties

nominal dimension mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
≤400	Sampling Direction Longitudinal	Preheat treatment	≥1860	≥1515	≥8	≥30	KU2 ≥39
≤285	Sampling Direction: Transverse	Final Heat Treatment	≥1860	≥1515	-	≥30	KU2 ≥23
<285~400	Sampling Direction: Transverse	Final Heat Treatment	≥1860	≥1515	-	≥30	KU2 ≥23

40CrNi2Si2MoVA Corresponding Standards(Same grade name, different standards)

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