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Duplex Stainless Steel F53 Stainless Steel Flange Element(%): F53 UNS S32750 C≤ 0.030 Mn≤ 1.20 P≤ 0.035 S≤ 0.020 Si≤ 0.80 Ni 6.0~8.0 Cr 24.0~26.0 Mo 3...