Abstract: As for production of the conventional 20Mn2 steel pipe used for crane boom service，there exist number of problems such as long production cycle，high energy consumption and cost，and frequently-encountered eccentricity， and decarbonization which leads to reducing the fatigue life of the steel pipe. To overcome such problems，a technical path with necessary countermeasures as worked out via relevant research are taken，including TMCP（thermal-mechanical control process），low alloying of the material，plastic deformation and heat treatment to produce hi-strength continuouslyrolled steel coil，and then adopting HF ERW process and weld heat treatment to produce QSTE550 high strength welded steel pipe. The said process features such advantages as reduction of the environment pollution，reducing the energy consumption，enhancing the manufacturing efficiency and improving the product quality，having been an important trend for selecting materials for the crane boom.