37CrNi3A - GJB 1220A-2008

Grade	37CrNi3A
Corresponding Standard	GJB 1220A-2008 Speification for alloy structure steel bar for artillery parts
Classification	Alloy Steel

37CrNi3A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu
Minimum Value	0.34	0.17	0.25	-	-	1.2	3	-
Maximum Value	0.41	0.37	0.55	0.025	0.025	1.6	3.5	0.25

37CrNi3A 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	820°C quenching, oil cooling, 500°C tempering, water or oil cooling	≥1130	≥980	≥10	≥50	-	KU2 ≥47
Steel	Annealing or Tempering	-	-	-	-	≤269	-

37CrNi3A Corresponding Standards(Same grade name, different standards)

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