EN 10028 – P460NH, P460NL1, P460NL2

Posted:2016-04-25 23:51:27

P460NH, so called for having a minimum yield strength of 460 MPa, is is a high quality pressure vessel steel grade for use in boiler and pressure vessel fabrication. It is a normalised fine grain steel with good weldability characteristics.

Other grade types include...
• NL1 – is ideal for use in low temperatures
• NL2 – is ideal for use in especially low temperatures
P460NH is also used in sour gas applications where the steel will be HIC Tested to gauge the materials susceptibility to hydrogen induced cracking

Please refer to the data tables below for more information.

Table 1: Chemical Composition of EN 10028 P460 NH, P460 NL1 & P460 NL2
Chemical element composition is % by mass.

Element	P460NH	P460NL1	P460NL2	Element	P460NH	P460NL1	P460NL2
Carbon (C) max.	0.20	0.20	0.20	Silicon (Si) max.	0.60	0.60	0.60
Manganese (Mn)	1.10 to 1.70	1.10 to 1.70	1.10 to 1.70	Phosphorous (P) max.	0.025	0.025	0.020
Sulphur (S) max.	0.015	0.015	0.010	Chromium (Cr) min.	0.30	0.30	0.30
Molybdenum (Mo) max.	0.10	0.10	0.10	Nickel (Ni) max.	0.80	0.80	0.80
Niobium (Nb) max.	0.05	0.05	0.05	Titanium (Ti) max.	0.03	0.03	0.03
Vanadium (V) max.	0.20	0.20	0.20	Nitrogen (N) max.	0.025	0.025	0.025
Aluminium (Al) max.	0.020	0.020	0.020	Copper (Cu) max.	0.70	0.70	0.70

The combined quantities of Niobium, Titanium and Vanadium should be 0.22% max.

Table 2: Mechanical Properties of EN 10028 P460 NH, P460 NL1 & P460 NL2

Grade	Type	Thickness (mm)	Yield Strength MPa (min)	Tensile Strength MPa	Elongation % (min)
P460 NH P460 NL1 P460 NL2	Normalized	≤ 16 16> to ≤40 40> to ≤60 60> to ≤100 100> to ≤150	460 445 430 400 –	570 to 750 570 to 720 570 to 720 540 to 710 –	17 17 17 17 17

(Please note: the technical information above is for guidance only – for exact specifications please check with our Sales Team)

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