P355N steel grade is a normalized, weldable fine grain steels for pressure purposed. The dimensions and tolerance on dimensions should be according to EN 10028-1.
P355N Chemical Composition:
C : <=0.2 Si:<= 0.5 Mn:0.9-1.7 S :<=0.03 N:<= 0.02 AL:<= 0.02 Nb:<= 0.05
P :<=0.03 Cr:<=0.30 Ni:<=0.5 Mo::<= 0.08 Cu:<= 0.30 Vi:<= 0.1 Ti :<= 0.03
Nb+Ti+V: <= 0.12
P355N Mechanical properties:
Tensile Strength σb(MPa) :
490-630 (thickness under 70mm);
470-610(thickness between 70-100mm);
450-590(thickness between 100-150mm);
Yield Strength σ0.2 :
>=355(thickness under 35mm);
>=345(thickness between 35-50 mm);
>=335(thickness between 50-70mm);
>=315(thickness between 70-100mm);
>=295(thickness between 100-150mm)
Elongation δ5(%) : >= 21
P355N Application：
EN 10028-3 P355N steel is mainly used to manufacture boilers and vessels which often worked in harsh environment, especially, high pressure, this environment requirements on steel is relatively high.
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