EN10028-3 P355 Steels for Pressure Vessels

Pressure Vessel made with P355 Dillinger Steel Plate

Pressure Vessel made with P355 Dillinger Steel Plate

P355 boiler plate to EN10028-2 is a  fine grained steel for used in pressure vessels, heat exchangers and reactors.

P355 is one of our most popular pressure vessel steels. This is because our large steel stock of P355 is characterised by a high overall tonnage, large availability of plate dimensions in each thickness and the high quality of the steel we supply.

P355 is the highest quality pressure vessel steel in common use that is specified by EN10028-2 and EN10028-3 (Though we also have P460NL2 in stock). Some of the plates are characterised by their high weldability and fine grain structure, whilst others have improved properties making them suitable for elevated temperatures. The main grades that we supply are:

P355 Steel Plate Available Ex-Stock

Plates are available in thicknesses from 6mm to 200mm with many thicker plates available. We have a wide variety of plate dimensions available with 2m, 2.5m and 3m widths being the most common. Lengths available in stock are 12m and then multiples of 3m or 4m.

Our thicker plates come from Dillinger Hutte, the famous German heavy plate steel mill, whilst many of the thinner plates come from Thyssen or Dureco Clabecq. The P355 plates are all certified to EN10204 and have either a 3.1 or 3.2 MTC. Some plates may also be certified to the old version of EN10204 and have a 3.1B certificate.

For customers in Europe P355 plate can be ordered direct from Dillinger or from stock from AncoferWaldram. The EN10028-3 and EN10028-2 standards can be purchased from the BSI

P355 Pressure Vessel Steel Chemical Composition

Steel GradeCC (Min)SiMnMn (Min)PSAlNCrCuMoNbNiTiVCR+Cu+Mo+NiNb+Ti+V
P355 GH0.220.10.61.71.10.0250.010.020.0120.30.30.080.040.30.030.020.7
P355 NH0.180.51.71.10.0250.010.020.0120.30.30.080.050.50.030.10.12
P355 NL10.180.51.71.10.0250.0080.020.0120.30.30.080.050.50.030.10.12
P355 NL20.180.51.71.10.020.0050.020.0120.30.30.080.050.50.030.10.12
This table provides the main features of the chemical composition of different grades of P355 boiler plate steel as required by EN 10028-3:2009 and EN10028-2:2009. It is not complete as we have not included many of the minor use cases. These may have a major impact in your application so please use this for reference purposes only and refer to your original and up to date copy of the relevant standard