Steel pipe network to share: square tube performance knowledge

1. Square tube performance index analysis - Plastic plastic refers to the metal material under load, resulting in plastic deformation (permanent deformation) without the ability to destroy. 2. Square tube performance index analysis - hardness Hardness is a measure of the hardness of metal materials pointer. At present, the most commonly used method for determining hardness in production is press-in hardness method, which is to press the surface of a metal material to be tested under a certain load with a certain geometry indenter to determine the hardness value according to the degree of press-in. Commonly used methods are Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV) and other methods. 3. Square tube performance index analysis - fatigue The strength, plasticity and hardness discussed above are all mechanical properties of metal under static load. In fact, many machine parts work under cyclic loads and the parts can fatigue under these conditions. 4. Square tube performance index analysis - impact toughness The load acting on the machine at high speed is called the impact load. The ability of the metal to resist damage under impact load is called impact toughness. 5. Square tube performance index analysis - Strength strength refers to the metal material under static load resistance to damage (excessive plastic deformation or fracture) performance. As the role of the load mode of tension, compression, bending, shear and other forms, so the strength is divided into tensile strength, compressive strength, bending strength, shear strength and so on. Often there is a certain relationship between the various strengths, the use of more generally to the tensile strength as the most basic strength indicators.