25CrMnSi - GJB 1220A-2008

Grade	25CrMnSi
Corresponding Standard	GJB 1220A-2008 Speification for alloy structure steel bar for artillery parts
Classification	Alloy Steel

25CrMnSi Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.22	0.9	0.8	-	-	0.8	-	-
Maximum Value	0.28	1.2	1.1	0.03	0.03	1.1	0.3	0.25

25CrMnSi 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=15	880°C Quenching, Oil Quenching, 480°C Tempering, Water or Oil Quenching	≥1080	≥885	≥10	≥40	-	KU2 ≥39
Steel	Annealing or Tempering	-	-	-	-	≤217	-

25CrMnSi Corresponding Standards(Same grade name, different standards)

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