Standard: DIN, ASTM, BS, GB,Standard: ASTM A53-2007,BS 1387, GB/T3901,Grade: 10#-45#, 16Mn, A53-A369, API J55-API P11...Grade: 20#, 16Mn, A53(A,B), API J55, Q235, Q195...Thickness: 4- 30mmSection Shape: RoundOuter Diameter: 219 – 2020mmPlace of...
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