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ASTM A312 TP304 Base Tube Composition Grade UNS Designation C Mn P S Si Cr Ni TP304 S30400 0.08 2.00 0.045 0.03 1.00 18.0–20.0 8.0–11.0 ASTM A312 TP304 Serrated Fin Tube Application 1. Heat Exchangers ...