X 53 CrMnNiNbN 21 9 - ISO 683-15-1992

Grade	X 53 CrMnNiNbN 21 9
Corresponding Standard	ISO 683-15-1992 Valve Steels for Internal Combustion Engines
Classification	Alloy Steel

X 53 CrMnNiNbN 21 9 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	N	More
Minimum Value	0.48	-	8	-	-	20	3.25	0.38	C+N＞0.90；Nb+Ta：2.00~3.00
Maximum Value	0.58	0.45	10	0.05	0.03	22	4.5	0.5	C+N＞0.90；Nb+Ta：2.00~3.00

X 53 CrMnNiNbN 21 9 Mechanical Properties

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
Solution Treatment (ST) + Precipitation Hardening (P)	950~1150	≥580	≥8	≥10	HRC ≥30

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