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EN10028-6 P355QL1 Pressure Vessel And Boiler Steel Plate Chemical Composition and Mechanical Property Grade C% SI% Mn% P% S% N% B% Cr% Mo% Cu% Nb% Ni% Ti% V% Zr% P355QL1 0.16 0.4 1.5 0.02 0.01 0. 015 ...