34CrMo4 steel pipe is used as an important structural part for working under high load, such as the transmission part of vehicle and engine; Steam turbine generator rotor, shaft, heavy load of transmission shaft, the big cross section 34CrMo4 steel pipe parts used in the manufacture of requirements higher than 34CrMo4 steel pipe strength and conditioning section more large forgings, such as locomotive traction with the big gear, supercharger drive gear, rear axle, the load of connecting rod and a spring clip, 34CrMo4 steel pipe can also be used to under 2000m deep well of oil drill 34CrMo4 steel pipe joint and the fishing tool and so on.
34CrMo4 steel pipe in the high temperature has high endurance strength and creep strength, low temperature impact toughness is good, hardenability is good, no tendency to overheat, quenching deformation is small, plasticity is good when cold side shape, machinability is medium. 34CrMo4 steel pipe has poor weldability, preheat before welding, heat treatment after welding and stress elimination, generally used after tempering, also 34CrMo4 steel pipe is used after high and medium frequency surface quenching or quenching and low and medium temperature tempering.
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