In logistics and industrial handling applications, the stability of a handcart or tricycle's axle directly determines the lifespan and safety of the entire machine. traditional carbon steel axles are prone to bending, deformation, or even fracture under prolonged heavy loads, posing significant safety hazards. however, axles made from high-quality 20crmo alloy structural steel, thanks to their high toughness, fatigue resistance, and excellent heat treatment properties, offer a superior solution