34CrMo4 steel pipe (1.7220) belongs to the European standard alloy structural steel, the implementation standard: EN 10083-3-2006.
34CrMo4 steel pipe (1.7220) has high endurance strength and creep strength at high temperature, good low temperature impact toughness, good hardenability, no tendency to overheat, small quenching deformation, good plasticity in cold edge shape, and medium workability. Poor weldability, preheating before welding, post-weld heat treatment and stress relief are generally used after quenching and tempering treatment, and it can also be used after high and medium frequency surface quenching or quenching and low and medium temperature tempering.
34CrMo4 steel pipes are mainly used as important structural parts that work under high loads, such as transmission parts of vehicles and engines; rotors, main shafts, heavy-load transmission shafts of steam turbine generators, and large-section parts.
34CrMo4 steel pipe is used to manufacture forgings that require higher strength and larger quenched and tempered section than 35CrMo steel, such as large gears for locomotive traction, supercharger transmission gears, rear axles, connecting rods and spring clips that are heavily loaded, 34CrMo4 Steel pipes can also be used for oil deep well drill pipe joints and fishing tools under 2000m.
