P355NH
Used in petroleum, chemical, power plants, boilers and other industries for the production of reactor, heat exchanger, separator, spherical tanks, oil and gas tanks, gas tank, nuclear reactor pressure shell, boiler drum, liquefied petroleum gas bottles, hydropower high pressure water pipe, the turbine volute equipment and components.
Implementation of the standards: EN10028 European standard, full name: normalizing weldable fine grain steel.
Steel family:
P275NH, P275NL1, P275NL2, P355N, P355NH, P355NL1, P355NL2, P460NH, P460NL1, P460NL2.
Level:
Room temperature, the quality level P355N
High temperature quality level P355NH
The cryogenic Quality grade P355NL1, P460NL1
Special low temperature quality level P355NL2, P460NL2
Room temperature tensile properties:
P355N, P355NH, P355NL1, P355NL2 thickness 8-260mm
Tensile Rm630-450MPa, yield strength :355-295MPa, elongation after fracture 21-22%
Resistance to hydrogen-induced cracking assessment:
Steel products resistance to hydrogen-induced cracking assessment test A test solution (PH 3) or B test solution (PH 5) and the acceptance criteria can be selected in accordance with EN10229.
HIC test acceptance level:
Acceptance levels Level I Level II Level III.
CLR% crack length ratio, CTR% crack thickness ratio, CSR% crack sensitivity ratio.
State application P355NH:
Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, the Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland, the United Kingdom.