31Si2MnCrMoVE - GJB 3325A-2019

Grade	31Si2MnCrMoVE
Corresponding Standard	GJB 3325A-2019 Specification for Ultra-High Strength Steel Forgings of Aerospace Solid Rocket Motor
Classification	Alloy Steel

31Si2MnCrMoVE Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni ^*	Cu	Mo	V
Minimum Value	0.28	1.4	0.7	-	-	1	-	-	0.4	0.08
Maximum Value	0.33	1.7	1	0.015	0.01	1.3	0.25	0.25	0.55	0.15

31Si2MnCrMoVE Mechanical Properties

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
Heat Treatment	≥1620	≥1320	≥8	≥30	KU2 ≥35

31Si2MnCrMoVE Corresponding Standards(Same grade name, different standards)

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