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ANSWER: 355N is the material in International standard EN10025-3. EN10025-3 specifies the technical delivery conditions for flat an long products of hot rolled weldable fine grain structural steels in the normalized/normalized rolled delivery condition in the grades and qualities in the steel products whose thickness not more than 250mm.
The delivery condition of 355N steel is normalized or normalized rolled
355N steel flat and long products apply to thickness not more than 3mm-250mm
The “S” in 355N means “Structural” So, 355N is an Structural weldable quality steel grade
355N steel apply for the sheet, plate, strip, wide flats and flats, sections, Bars and rods products.
355N impact test temperature is -20 °C
The material No. Of 355N is 1.0545
Yield strength of 355N steel is min 275MPa
Tensile strength of 355N steel is 450-630MPa
Elongation of 355N steel not more than 21%.