15NiCuMoNb5-6-4 1.6368 - EN 10028-2-2009

Grade	15NiCuMoNb5-6-4
European Standard Steel Grade	1.6368
Corresponding Standard	EN 10028-2-2009 Flat products made of steels for pressure purposes Part 2 Non-alloy and alloy steels with specified elevated temperature properties
Classification	Alloy Steel

15NiCuMoNb5-6-4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^⑤	Mo	N	Nb	Al
Minimum Value	-	0.25	0.8	-	-	-	1	0.5	0.25	-	0.015	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	-

15NiCuMoNb5-6-4 Mechanical Properties

thickness t mm	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	≥40
40＜t≤60	Normalizing and Tempering (+NT)	610~780	≥440	≥16	40
60＜t≤100	Normalizing and Tempering (+NT)	600~760	≥430	≥16	≥40
100＜t≤150	Normalizing and Tempering (+NT) or Quenching and Tempering (+QT)	590~740	≥420	≥16	≥40
150＜t≤250	Quenching and Tempering (+QT)	580~740	≥410	≥16	≥40

1 Approximate Comparison Table

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

2 Approximate Comparison Table Seamless steel tubes and pipes for high pressure boiler

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

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