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P355NH HIC Boiler Steel Plate

P355NH HIC steel plate is used in petroleum, chemical, power station, boiler and other industries for the production of reactors, heat exchangers, separators, spherical tanks, oil and gas tanks, liquefied gas tanks, nuclear reactor pressure shells, boiler steam drums, liquefied petroleum gas cylinders, Hydropower station high-pressure water pipes, turbine volutes and other equipment and components.
Standard: EN10028 European standard
Application: normalized weldable fine grain steel plate.
Common grades:P275NH, P275NL1, P275NL2, P355N, P355NH steel, P355NL1, P355NL2, P460NH, P460NL1, P460NL2.

Qualtiy level

Room temperature quality P355N
High temperature quality grade P355NH
Low temperature quality grade P355NL1, P460NL1
Special low temperature quality grade P355NL2, P460NL2

P355NH HIC Boiler Steel Tensile Strength

P355N, P355NH HIC, P355NL1, P355NL2 plate thickness: 8-260mm
Tensile strength Rm630-450MPa, yield strength: 355-295MPa, elongation after fracture 21-22%

Hydrogen Induced Cracking Evaluation(HIC Test)

The anti-hydrogen cracking evaluation test for steel products shall be carried out in accordance with EN10229, and the A test solution (PH 3) or the B test solution (PH 5) and the corresponding acceptance criteria may be selected.
HIC test acceptance level:
Acceptance level is divided into level I, level II, level III.
CLR% crack length ratio, CTR% crack thickness ratio, CSR% crack sensitivity ratio.
Countries applying P355NH boiler steel are: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland, the United Kingdom.