15NiCuMoNb5-6-4 1.6368 - EN 10216-2-2024

Grade	15NiCuMoNb5-6-4
European Standard Steel Grade	1.6368
Corresponding Standard	EN 10216-2-2024 Seamless Steel Tubes for Pressure Purposes - Technical Delivery Conditions - Part 2: Non-Alloy and Alloy Steel Tubes with Specified Elevated Temperature Properties
Classification	Alloy Steel

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

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	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	0.045	0.05

15NiCuMoNb5-6-4 Mechanical Properties

wall thickness T mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
T≤100	610~780	ReH ≥440	l: ≥19；t: ≥17	20°C: l: ≥40；t: ≥27

• l = longitudinal; t = transverse.

1 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

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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