Square pipe can be divided into seamless and welded seams. Seamless square pipe is formed by extrusion of seamless round pipe.
1. Performance Index Analysis of Square Pipe-Plasticity
Plasticity refers to the ability of metal materials to produce plastic deformation (permanent deformation) without destroying under load.
2. Performance Index Analysis of Square Tube-Hardness
Hardness is the index to measure the degree of hardness and softness of metal materials. Pressure hardness method is the most commonly used method to measure hardness in production at present. It uses a certain geometric shape of the pressure head to press into the tested metal material surface under a certain load, and to measure its hardness value according to the degree of pressure.
Common methods include Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV).