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SA182-F51 ANSI ASME Duplex Stainless Steel Flange Element(%): F51 UNS S31803 C≤ 0.030 Mn≤ 2.00 P≤ 0.030 S≤ 0.020 Si≤ 1.00 Ni 4.5~6.5 Cr 21.0~23.0 Mo 2...