40CrMnSiMoVA GC-4 - GJB 5063-2001

Grade	40CrMnSiMoVA
	GC-4
Corresponding Standard	GJB 5063-2001 Specification for ultra-high strength steel bars for aviation and areospace
Classification	Alloy Steel

40CrMnSiMoVA Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	V	Al
Minimum Value	0.36	1.2	0.8	-	-	1.2	0.45	0.07	-
Maximum Value	0.41	1.6	1.2	0.02	0.02	1.5	0.6	0.12	0.08

40CrMnSiMoVA Mechanical Properties

section area	Mark	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
sample	Sampling Direction Longitudinal	1 Group Heat Treatment	≥1860	-	≥8	≥35		KU2 ≥39
sample	Sampling Direction: Transverse	1 Group Heat Treatment	≥1810	-	≥5	≥15		KU2 ≥16
sample	Sampling Direction Longitudinal	2 groups Heat Treatment	≥1760	-	≥8	≥35		KU2 ≥47
sample	Sampling Direction: Transverse	2 groups Heat Treatment	≥1715	-	≥5	≥15		KU2 ≥16
Steel Rod		Normalizing + High temperature tempering or high temperature tempering					≤254

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

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