15NiCuMoNb 5-6-4 - ISO 9328-2-2018

Grade	15NiCuMoNb 5-6-4
Corresponding Standard	ISO 9328-2-2018 Steel Flat Products for Pressure Purposes - Non-alloy and Alloy Steels with Specified Elevated Temperature Properties
Classification	Alloy Steel

15NiCuMoNb 5-6-4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N	Nb	Al
Minimum Value	-	0.25	0.8	-	-	-	1	0.5	0.25	-	0.015	-
Maximum Value	0.17	0.5	1.2	0.025	0.01	0.3	1.3	0.8	0.5	0.02	0.045	0.015

15NiCuMoNb 5-6-4 Mechanical Properties

	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t≤40	Normalizing and Tempering (+NT)	610~780	≥460	≥16	（-20℃） ≥27
40＜t≤60	Normalizing and Tempering (+NT)	610~780	≥440	≥16	≥27
60＜t≤100	Normalizing and Tempering (+NT)	600~760	≥430	≥16	≥27
100＜t≤150	Normalizing and tempering or quenching and tempering (+NT or +QT)	590~740	≥420	≥16	≥27
150＜t≤200	Quenching and Tempering (+QT)	580~740	≥410	≥16	≥27

Approximate Comparison Table Pressure-Bearing Flat Steel

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
15NiCuMoNb 5-6-4	15NiCuMoNb 5-6-4	1.6368

15NiCuMoNb5-6-4 Corresponding Standards(Same grade name, different standards)

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