G20Cr2Ni4 - GB /T 3203-2016

Grade	G20Cr2Ni4
Corresponding Standard	GB /T 3203-2016 Carburizing steels for bearing
Classification	Bearing Steel
Properties	Strength Hardness Impact Toughness Fatigue Resistance

G20Cr2Ni4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	Al	H	Ca
Minimum Value	0.17	0.15	0.3	-	-	1.25	3.25	-	-	-	-	-	-
Maximum Value	0.23	0.4	0.6	0.02	0.015	1.75	3.75	0.25	0.08	0.005	0.05	0.0002	0.001

G20Cr2Ni4 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*	Double Quenching + Oil Cooling, Tempering + Air Cooling	≥1180		≥10	≥45	-	≥63
Delivery Condition**	WHR+SA/WHF/WHF+SA/WCD/SF or SP	-	-	-	-	≤241	-

Approximate Comparison Table Case-Carburized Bearing Steel

China		International Organization for Standardization	Russia
GB	ISC	ISO	GOST
G20Cr2Ni4	B11200	≈18NiCrMo14-6 (B31)	20Х2Н4А

G20Cr2Ni4 Corresponding Standards(Same grade name, different standards)

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