Application of square seamless steel pipe

Application of square seamless steel pipe is used in a number of industries.

There are mainly three kinds of forming technology of seamless square seamless steel pipe: hot-rolled, cold-drawn and welded. For the cold drawn square seamless steel pipe, the ability of withstanding localized concentrated load is weak, the welding process produced pipe welds are the weak link; do not apply to the construction of high-end residential buildings. Currently, the domestic general uses cold drawn or welded tube production. While the foreign mainly uses hot rolling process, fully able to meet the requirements of high-end buildings. The high-end hot-rolled seamless square seamless steel pipe construction is with good bearing properties, good weldability, low production costs and high production efficiency.

It is understood that the hot-rolled seamless square seamless steel pipe due to structural features of its own, effectively circumvent the connection between the column and beam welding defects and leading to performance degradation, can significantly improve the problem of low efficiency of the traditional low-rise concrete structure, large pollution, waste of resources and other issues; at the same time, the product is with such good performance as the uniform force, high dimensional accuracy, high strength and good impact resistance, can improve the seismic resistance of high-end architecture, will be widely used in steel high-rise buildings, airports and other construction, and has become the main support materials of the construction industry in the future, with great market prospects. At present, this square seamless steel pipe has been put on the market and is widely used in high-rise buildings.

To make the problem easier, square steel pipes are used. The square steel pipes are used in a special configuration. Both the perpendicular sides of two square steel pipes are respectively aligned in perpendicular and parallel to the plane of the frame bodies. In this case, by butt-welding, the cross points of the bar members are joined along a short weld line

1 square seamless steel pipe performance index - plastic
Plasticity refers to the metal material in the loading, the plastic deformation (permanent deformation) without the capacity to destroy.

2 square seamless steel pipe performance index analyses - hardness
Steel pipe hardness is a pointer to measure the hardness of the metal material. Determination of hardness in the production method is the most commonly used is the indentation hardness method, which is under a certain load with a certain geometry of the indenter pressed into the metal surface to be tested, to determine the hardness value according to the degree of being pressed into. Common methods are Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC) and Vickers hardness (HV) method.

3 square seamless steel pipe performance indexes - fatigue
Discussed earlier, strength, ductility, hardness, are the mechanical properties of metals under static loading pointer. In fact, many machine parts working under cyclic loading, under such conditions, parts will fatigue.

4 square seamless steel pipe performance index analyses - the impact toughness
Known as the impact load in the load on the parts to the great speed of the role of metal called impact toughness under impact loading, the ability to resist damage.

5 square seamless steel pipe performance index analysis - strength
Intensity refers to the metal material to resist damage (excessive plastic deformation or fracture) performance in the static load effect. As the load mode of action of the form of tension, compression, bending, shear, so the strength is also divided into the tensile strength, compressive strength, flexural strength, shear strength. Various intensities of certain frequent use is generally more to the tensile strength as the basic strength of the pointer.