type 2 cylinder tube, o.d.232mm-406mm, w.t.4.2mm-5.6mm. ... Material: 30CrMo, 35CrMo, 34CrMo4, 34Mn2V. Length: 3-10.5m. type ... 2 cylinder tube: MaterialC%Rm ,MPa ReL ,MPa A , External diametermmWall-thickness ... ≤0.020P+S≤0.030.Thermal treatment: quenching and tempering type 2 cylinder tube