... , Q195-Q345Grade: 20#, 45#, 16Mn, St52, St42, Q345, Q195, ...Thickness: 6 - 30 mmSection Shape: RoundOuter Diameter: 80 - 180 mmPlace of Origin ... 52 (5) Tolerate: OD :+1% / -1% WT: +12.5% / -10% (6) Technics : hot rolled .or cold rolled (7) Packing : paint,bundles ...