What is P355NH steel?

P355NH steel is characterised by good weldability and high resistance to brittle cracking. These types are used above all for manufacturing vessels for pressurised gas (LPG, butane and propane tanks), pressure vessels, parts for steam boilers, pressure piping, compressors, etc. Its most widespread use is in application environments up to 400 ºC.

P355NH steel is supplied in the normalised condition. The normalising temperature is 900 – 950 ºC, and it must be left in the furnace after temperature equalising for approximately 1 minute per millimetre of thickness of the plate. As a result, it offers good cold-forming and hot-forming properties without negatively affecting the material properties.

Equivalent grades of   steel   P355NH (1.0565)