Square steel tube is a kind of hollow square cross-section light-weight thin-walled steel tube, which can also be called steel refrigerated bending section, and because of its good mechanical properties in the construction profession, machinery manufacturing, steel construction projects have their application fields; Occupation in steel structures: steel structure engineering, power engineering and power plants can also be seen, when we drive on the highway to see the railings on both sides of the highway is square steel pipe, farming machinery and laboratory used for farming The chemical machinery used is also made of square steel pipe.
The mechanical performance parameters of the square steel pipe include the following items in detail:
1. Analysis of the performance index of square steel pipe - plasticity
Plasticity refers to the ability of a metal material to undergo plastic deformation (permanent deformation) without being damaged under load effects.
2. Analysis of performance index of square steel pipe - hardness
Hardness is a measure of the degree of hardness and hardness of metallic materials. The most commonly used method for determining hardness in production is the press-in hardness method, in which a certain number of shape indenters press the metal material under test under a certain load to determine the hardness value of the metal material to be tested.
Commonly used methods are Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV) and other methods.
3. Analysis of the performance index of square steel pipe - fatigue
The strength, plasticity, and hardness discussed above are all indicators of the mechanical properties of the metal under static loading. In fact, many machine parts are operated under cyclic loading, and in these conditions the parts will wear out.
4. Analysis of performance index of square steel pipe - impact toughness
The effect of a great speed on the mechanical parts is called impact load. The impact resistance of metal under the effect of impact load is called impact toughness.
5. Analysis of the performance index of square steel pipe - Strength
Strength refers to the ability of a metallic material to resist damage (excessive plastic deformation or cracking) under static loading. As the effect of the load method is stretching, tightening, bending, shearing, etc., so the strength is also divided into tensile strength, compressive strength, bending strength, shear strength. There is always a certain amount of contact between various strengths, and the tensile strength is usually used as the most basic strength indicator.