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Carbon Erw Steel Pipe Spiral Welded Schedule 40 Round Shape 3 - 50 Mm Thickness OD1/2'-48' ChemicaI Composition Material C% Mn% S% P% Si% Q195 0.06-0.12 0.25-0.50 <0.050 <0.045 <0.30 Q215 0.09-0.15 0...