18Cr2Ni4WA - GJB 1220A-2008

Grade	18Cr2Ni4WA
Corresponding Standard	GJB 1220A-2008 Speification for alloy structure steel bar for artillery parts
Classification	Alloy Steel

18Cr2Ni4WA Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	W
Minimum Value	0.13	0.17	0.25	-	-	1.35	4	-	0.8
Maximum Value	0.19	0.37	0.55	0.025	0.025	1.65	4.5	0.25	1.2

18Cr2Ni4WA 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	950°C First Quenching, 850°C Second Quenching, Air Cooling, 160°C Tempering, Air Cooling	≥1130	≥835	≥12	≥50	-	KU2 ≥78
Steel	Annealing or Tempering	-	-	-	-	≤269	-

18Cr2Ni4WA Corresponding Standards(Same grade name, different standards)

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