30CrMnSiA - GJB 1220A-2008

Grade	30CrMnSiA
Corresponding Standard	GJB 1220A-2008 Speification for alloy structure steel bar for artillery parts
Classification	Alloy Steel

30CrMnSiA Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.28	0.9	0.8	-	-	0.8	-	-
Maximum Value	0.34	1.2	1.1	0.025	0.025	1.1	0.3	0.25

30CrMnSiA Mechanical Properties

diameter d mm	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
d=25	880°C Quenching, Oil Cooling, 520°C Tempering, Water or Oil Cooling	≥1080	≥835	≥10	≥45	-	KU2 ≥39
Steel	Annealing or Tempering	-	-	-	-	≤229	-

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

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