A steel designed for pressure vessels grade with good weldability and exceptional durability against brittle cracking, P355nh is employed around the globe by the fabricators for the production of pressure vessel tanks for the storage of pressurised gases. The compliant with the 10028 specifications 3 covers an assortment of weldable fine grain steels delivered in the normalised condition and meant to handle pressure purposes. En 10028 3 p355nh is steel designed for high-pressure applications, Starting at a minimum of p tensile strength of 355 mpa 355 which has defined raised temperature properties nh Grade-specific chemical makeup percentage p355nh 1. 0565 according en 10222, 4 component of chemical makeup p355nh p355nl1 p355nl2 element p355nh p355nl1 p355nl2 carbon c 0. 18 0. 18 0. 18 silicon si 0. 5 0. 5 0. 5 max. Max. Manganese mn 1. 10 to 1. 70 1. 10 to 1. 70 1. 10 to 1. 70 phosphorous p 0. 025 0. 025 0. 02 max. Sulphur s 0. 015 0. 015 0. 01 chromium cr 0. 3 0. 3 0. 3 max. Min. Molybdenum element Mo with a level of 0. 08 0. 08 0. 08 nickel ni 0. 5 0. 5 0. 5 max. Max. Niobium nb 0. 05 0. 05 0. 05 titanium ti 0. 03 0. 03 0. 03 max. Max. Vanadium v 0. 1 0. 1 0. 1 nitrogen level is 0. 012 0. 012 0. 012 max. Max. Aluminium al 0. 02 0. 02 0. 02 copper cu 0. 3 0. 3 0. 3 max. Max.