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P355QH EN10273 Carbon Steel Forged Disc PED Export To Europe 3.1 Certificate Pressure Vessel Blank Flange Compositon(%): P355QH C ≤ Si ≤ Mn P ≤ S ≤ Cr ≤ Mo ≤ Ni ≤ 0.16 0.4 1.50 0.025 0.015 0.30 0.25 0...