30CrMnSiA - GJB 1951-1994

Grade	30CrMnSiA
Corresponding Standard	GJB 1951-1994 Specification for quality structure steel bars for avication
Classification	Alloy Steel
Density	7.75 g/cm³

30CrMnSiA Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^*	Mo ^*	Ti ^*	W ^*	V ^*
Minimum Value	0.28	0.9	0.8	-	-	0.8	-	-	-	-	-	-
Maximum Value	0.35	1.2	1.1	0.025	0.025	1.1	0.4	0.25	0.15	0.03	0.2	0.05

30CrMnSiA 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					156~229
Longitudinal specimen d=25①	Quenching 880~900°C oil cooling, Tempering 500~560°C oil cooling	≥1080	≥835	≥10	≥45	302~363	≥39
Transverse sample d=25①	Quenching + Tempering	≥980	≥735	≥6	≥27		≥16

30CrMnSiA Corresponding Standards(Same grade name, different standards)

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