QaxGalvanized square pipe and rectangular pipeIn a situation of oversupply

Classification of wall thickness square tubes are divided into super square tubes, square tubes and thin-walled square tubes according to wall thickness. Gbt6728-200gbt6725-200gbt3094-2000, JG 178-200, ASTM A500, JIS g34en10210 or technical agreement.

After the sample is flattened to the specified flattening distance h, remove the load and remove the sample.

Qax.High quality steel (P & le; 0.035%, S & le; 0.030%)

However, there is a large rate of end in the application of steel pipe, which is mainly due to the trouble of internal and external treatment. The first question is very crucial, and the external quality is good or bad

.Square tube saves raw materials: the material rate of cold parts can usually reach more than 80%. For example, the material rate of pin cutting of brand automobile is 43%, while the material rate when cold is used is increased to 92%; For another example, after the universal joint bearing sleeve is changed to cold the material rate is increased from 28% in the past to%. It can be seen that the use of cold production of mechanical parts can save a lot of steel and non-ferrous metal materials.

It is feasible to use the theory to calculate static structures, such as warehouses, houses and bridges, but it is not suitable for moving components such as wheels. At this time people often use the plastic theory. The research of the plastic theory can be traced back to 1914. In 1975, the European Design Association formulated a plastic design code, which is mainly used for static load plane beams and frame structures subjected to bending stress The solution is as follows: for high-rise buildings, more detailed calculations are needed.

Production standard classification square tube is divided according to production standard: national standard square tube, British standard square tube, American standard square tube, European standard square tube and non-standard square tube.

Square pipe is an important pipe. Its application in various fields has different performance. According to its different performance, flatten, and then cut it to the required length. Nowadays, the forming of q355b square tube has solid bending and empty bending. The bending degree of q355b square tube shall not be greater than 3mm per meter, and the total bending degree shall not be greater than the actual bending of the total length. As the name suggests, the bending is compacted, and the internal and external rollers and the internal and external walls of the tube blank are compacted in both directions during the actual bending.

Fair price.Therefore, the drawing process of square tube is quite meticulous. For a long time, square tube, square tube, seamless square tube, galvanized square tube, galvanized tube and other brand products are provided with complete designated products and quality assurance. In the process of continuous development, square tube has also been processed more rigorously.

Mechanical property is an important index to ensure the end use performance (mechanical property) of square pipe, which depends on the chemical composition and heat treatment of steel. In the steel pipe standard, according to different service requirements, the tensile properties (tensile strength, yield strength or yield point, elongation), hardness and toughness indexes, as well as the high and low temperature properties required by users are specified.

Functional index analysis of square tube - commonly used are square tube Brinell angle (HB), Rockwell angle (hrahrbhrc) and Vickers angle (HV) Equal angle is a gauge needle to weigh the soft and hard level of metal data. In the current life, the angle method is rarely used to determine the angle. It uses the indenter with a certain number and shape to determine the angle value of the metal data surface being tested under a certain load according to the level.

The analytical technology of square tube sizing rolling. When sizing rolling is adopted, because there is no tool on the inner surface, the shape of the inner surface of the rolled material is not neat when rolling the tube. When the roll mill is used, the inner surface of the rolled material is angular. The occurrence mechanism of this phenomenon and the countermeasures to be taken are clarified by using the three-dimensional finite element method.

Latest consultation.In terms of hot working, repeated upsetting and multi-directional rolling of ingot can not only reduce the level of carbide segregation in square tube but also improve the anisotropy of steel.

Among them, q355b square tube is divided into: (a) by process & mdash& mdash; Arc welded square pipe, resistance welded square pipe (high frequency and low frequency) gas welded square pipe and furnace welded square pipe (b) are divided by weld & mdash& mdash; Straight welded square pipe

The standard number of square pipes for transporting flammable and non flammable fluids is gbt97 1 (gbt97 - 199 represents steel for l245-l4 and other pipelines. It is mainly used for transporting flammable and non flammable fluids, low-pressure or high-pressure square pipes, with high requirements.

Qax.Use classification square tubes are divided into: square tubes for decoration, square tubes for machine tool equipment, square tubes for mechanical industry, square tubes for chemical industry, square tubes for steel structure, square tubes for shipbuilding,QaxHot dip galvanized pipe, square tubes for automobile, square tubes for steel beams and columns, and square tubes for special purposes.

Before gas cutting, remove the dirt and grease on the steel surface, and leave a certain space below to facilitate the blowing out of slag. During gas cutting, the movement of the cutting torch shall be kept at a uniform speed. The cutting surface should be 2 ~ 5mm away from the tip of the flame core. If the distance is too close, the edge of the cut will melt, and if it is too far away, the cutting will be interrupted easily due to insufficient heat.

In fact, the casting cleaning is not just shot blasting. For large parts, the drum sand cleaning is carried out first,QaxDN100 galvanized square pipe,QaxDN50 galvanized pipe price, that is, the riser of the casting is cut off and rolled in the drum, and the square tubes collide with each other in the drum to remove most of the sand on the surface before shot blasting or shot blasting.