S420NL steel plate is high strength alloy steel plate. The yield strength value of the steel plate cannot be less than 420Mpa. S420NL steel plate needs to ensure the performance and surface quality, and the technical standard requirements are relatively strict.
S420NL is a European standard fine grain structural steel. S420NL has high comprehensive mechanical properties in the normalized or normalized plus tempered state.
S420NL steel plate is mainly used for large ships, bridges, power station equipment, medium and high pressure boilers, high pressure vessels, rolling stock, lifting machinery, mining machinery and other large welded structural parts.
S420NL steel plate shall be classified as alloy special steel. This grade of steel shall be supplied at the following levels specified in the inquiry and order: when the temperature is not lower than - 20, the minimum value of impact energy is specified, expressed in N. When the temperature is not lower than - 50, the minimum value of impact energy is specified, expressed in NL.
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