Hydraulic pillar tube, mainly used to manufacture hydraulic pillar, cylinder and piston, is the most important component of movable arm and impetus in industrial machinery. The common materials are 20#, 45#, 27SiMn, and 30CrMoSiA , etc. The rich content of rare elements ,advanced rolling equipment and heat treatment technology ensure that the hydraulic pillar tube has better strength, toughness and harden-ability.