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Carbon Steel ASME B16.47 Series a Mss Sp44 A105 Welding Neck Flange

Carbon Steel ASME B16.47 Series a Mss Sp44 A105 Welding Neck Flange
Material: Carbon steel: 20#, 20G, Q235B,ASTM A105/A105N,ASTM A694 F42-F70 Alloy steel: Q345(16Mn), 12CrMoV, 15CrMo,...

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