KedzierzynKozleCarbon steel square tubeAfter the festival, the blast furnace production resumed and the price was stabilized

announcer:hp256HP158312377 release time:2021-11-02 09:06:00

It seems that preheating the q355b square tube can avoid a lot of problems, and there will be a better guarantee that the q355b square tube itself is a quality problem.

After the square pipes are stacked and stored, the pipe end protector shall be removed to avoid moisture gathering on the surface of the pipe end protector and the square pipe, which is difficult to volatilize.

KedzierzynKozle.The load of impact toughness acting on the parts at a great speed is called impact load. It is specialized in products and renewable resources. Its business includes: square tube, square tube, seamless square tube, galvanized square tube and galvanized tube. The ability of metal under impact load is called impact toughness.

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

.Low alloy steel is divided into q34 16Mn, Q390, St52-3, etc.

The standard number of spiral square pipe (standard of the Ministry of petroleum) for low pressure transmission is syt5037-2008. The representative materials are q235bq345b and other carbon steel materials. It is mainly used for low-pressure transmission of water oil, natural gas, heating and other pipelines.

High hardness square tubes mainly bear fatigue load, so they must have high hardness. Therefore, quenching, surface quenching or chemical heat treatment shall be carried out, followed by low-temperature tempering treatment.


KedzierzynKozleCarbon steel square tubeAfter the festival, the blast furnace production resumed and the price was stabilized



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

Compared with other welding, square pipe welding has many advantages, mainly because of the exothermic reaction, the material only needs to be heated below the melting point

It must be noted that in the overall process of square tube coating process, the cost of surface treatment is still relatively high, so it is very important to select appropriate treatment. Only by selecting the right treatment can the coating quality of square pipe be well guaranteed.

Honesty and mutual benefit.Now, with the continuous development of q355b square tube, its use is becoming more and more extensive, and the technology is also following up. Therefore, we still look forward to the development of q355b square tube in the future.

Square tube has good machinability, good cold deformation plasticity and weldability; In addition, the toughness of steel does not decrease much during heat treatment, but it has quite high strength and wear resistance,KedzierzynKozleGalvanized round pipe,KedzierzynKozle180 galvanized square pipe, especially when water quenching; However, temper brittleness and overheating during heat treatment.

The test can be carried out under cold and hot conditions. If the test temperature is not specified, the test shall be carried out under normal temperature but not lower than - 10 ℃.


KedzierzynKozleCarbon steel square tubeAfter the festival, the blast furnace production resumed and the price was stabilized



It is a kind of cleaning for the surface of square pipe. Shot blasting is often used to clean the casting surface or strengthen the surface of square pipe.

build.Chemical polishing: less investment in processing equipment, high speed, gas overflow, demand for ventilation equipment and difficult heating. It is suitable for processing small batch of disordered parts and products with low brightness demand for small parts.

Derusting grade for the construction process of epoxy, ethylene, phenolic and other coatings commonly used for square pipes, the surface of square pipes is generally required to reach near white grade (SA). Practice has proved that almost all oxide scale rust and other dirt can be removed by using this derusting grade, and the depth of anchor grain can reach 40 ~ 100 & mu; m, which fully meets the requirements of adhesion between layer and square pipe The shot derusting process can meet the technical conditions of near white level (SA) with low operation cost and stable and reliable quality.

The square tube will be tested in many aspects of its performance in the process. Each test is for the square tube to have a good performance in practical application. So what are the different properties of square tubes? Next, I'll introduce the characteristics of the lower tubes in terms of mechanical properties.

KedzierzynKozle.It is a kind of cleaning for the surface of square pipe. Shot blasting is often used to clean the casting surface or strengthen the surface of square pipe.

How about the tensile strength of square pipe: square pipe has good tensile strength, tensile strength and sufficient toughness, which makes square pipe stand out in the field of steel pipe. The square tube has great advantages in high temperature, high pressure and even high strength environment. What are its characteristics? We analyze it one by one: tensile strength (& sigma; b) the strong force (FB) borne by the sample during tensile breaking, and the stress (& sigma;) obtained from the original cross-sectional area (so) of the sample is called tensile strength (& sigma; b), and the unit is nmm2 (MPA).

Stainless steel q355b square pipe for fluid transportation, 0017cr17ni14mo2, etc. It is mainly used to transport low-pressure corrosive media.