Performance Index of square tube

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Performance Index of Square Tube

1 square tube performance index - plastic 
Refers to the metal in the plastic under load, the plastic deformation (permanent deformation) without the ability to damage. 

2 square tube performance index - hardness 
Hardness is a measure of the hardness of the metal material pointers. Hardness determination of the current production method is most commonly used is the indentation hardness method, which is a geometric shape indenter under a load onto the metal surface to be tested to measure the hardness value according to the degree of being pushed. There Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV) and other methods commonly used method. 

3 square tube performance index - Fatigue 
Previously discussed the strength, ductility, hardness is metal under static load mechanical properties pointer. In fact, many machine parts are working under cyclic loading, under such conditions the parts will produce fatigue. 

4 square tube performance index - the impact toughness 
With great speed load acting on the mechanical shock loads on the known ability of metal to resist damage in the impact loading is called toughness. 

5 square tube performance index - strength 
Strength refers to the metal material to resist damage (excessive plastic deformation or fracture) performance under static load effect. Since the mode of action of the tensile load, compression, bending, shear, etc., the tensile strength is also divided, compressive strength, flexural strength, shear strength. Between various strength often some connection, using generally more strength to tensile strength as the most basic pointers.