type 2 cylinder tube, o.d.232mm-406mm, w.t.4.2mm-5.6mm. ... : 30CrMo, 35CrMo, 34CrMo4, 34Mn2V. Length: 3-10.5m. type 2 cylinder tube: MaterialC%Rm ,MPa ReL ,MPa A , External diametermmWall-thickness/mmNon ... ,+15%,-04.8,+15%,-05.0, +15%,-05.6, +15%,-01.5mm/M3-10.5 ≤0.5%diameter 35CrMo0.32/0 ... +S≤0.030.Thermal treatment: quenching and tempering type 2 cylinder tube