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amanda2020jumi-blog · 5 years ago

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this week, the prices of various varieties in the special steel market

this week, the prices of various varieties in the special steel market are relatively strong, with an increase of 50-100. At the beginning of the week, the profit and surplus temperature were still in place. Tangshan's production restriction was finally confirmed at the end of the week, which led to high inflation. The market was bullish. In terms of structural steel price adjustment, Huaigang, Jiyuan and Yuanli increased their prices by 80 yuan, Zhongtian increased their prices by 50 yuan, Laigang increased their prices by 30 yuan. At present, the market is short of large-scale resources, the stock of traders is at a normal level, the prices in the early stage rose too fast, the downstream acceptance is limited, and the transaction slows down In the middle of the week, the market began to regain its sense and wait-and-see mentality dominated. In terms of industrial line, Shagang increased 120-150, Jiyuan increased 80, Xinggang increased 50-100. As the ferrous metal continued to reach a new high, jiluo and iron ore remained at a high level of shock, the steel plant cost increased, and the mentality of price fixing was strong, driving the market to rise. This week, the hard line rose by more than 100%, and the increase of wire drawing and cold heading was in the range of 50-80. At present, the market <a href="http://www.metmac.com/press-brake.html">Contact Us</a> is both bullish and wait-and-see. The bullish market continues to be reluctant to sell. This situation is relatively obvious in the northern out of stock market. Most of the onlookers are afraid of heights. After the high price rise is blocked, the actual transaction in the market has a hidden decline For now, the price will not support the continuous and rapid rise, and the market with high-level adjustment will not be excluded. Therefore, it is recommended to be cautious in pursuing the high position at this stage. Considering that the current market fundamentals have not been fundamentally reversed, and the price fluctuation is relatively limited, it is expected that the price of various varieties of special steel will be adjusted by shocks next week, with a range of about 30-50. Causes and prevention of misalignment of carbon <a href="http://www.metmac.com/cnc-h-beam-beveling-machine.html">visit</a> steel spiral steel pipeMeasures are necessary. 1. The sickle bending of steel strip is the main cause of steel tube misalignment. In the forming of spiral welded pipe, the sickle bend of steel strip will constantly change the forming angle, resulting in the change of weld gap, resulting in open seam, staggered edge and even lap edge. It seriously affects the quality of steel pipe, so it is an effective way to reduce the staggered edge of steel belt sickle bend in the production process to observe the sickle bend after uncoiling, to control the vertical roll so that the disc shear can cut off part of the sickle bend, and to continuously control and correct the forming angle. 2. Due to the poor shape and dimensional accuracy of the head and tail of the steel strip without trimming, it is easy to cause the steel strip to bend hard and cause the wrong edge during butt joint. 3. When the weld reinforcement of butt welding at the head and tail of steel strip is large, if it is handled improperly during overmolding, it is easy to cause large misalignment. 4. Poor edge condition of steel strip is another important cause of edge staggering. Spiral welded steel pipe has strong pressure bearing capacity and good plasticity, which is convenient for welding and processing; spiral seam submerged arc welded steel pipe for general low-pressure fluid transportation is made by double-sided automatic submerged arc welding or single-sided welding method, which is used for general low-pressure fluid transportation such as water, gas, air and steam. Its strength is generally higher than that of straight welded pipe. It can produce welded pipe with larger diameter with narrow blank, and can also produce welded pipe with different diameter with the same width of blank. However, compared with the same length of straight seam pipe, the weld length increases by 30-100%, and the production speed is low. Therefore, most of the welded pipes with smaller diameter are straight seam welded, while most of the welded pipes with large diameter are spiral welded. Compared with solid steel such as round steel, when the bending and torsional strength of steel pipe is the same, the weightIt is a kind of economic section steel, widely used in manufacturing structural parts and mechanical parts, steel scaffolding used in construction, etc. Q235B spiral steel pipe is widely used to manufacture ring parts, which can improve material utilization, simplify manufacturing process, save material and processing time, such as rolling bearing ring, jack sleeve, etc. Steel pipe is also a kind of normal indispensable material, etc. all need to be made of steel pipe. According to the different cross-sectional shapes, steel pipes can be divided into circular pipes and special-shaped pipes. Because of the large area of the circle under the condition of the same circumference, more fluid can be transported by the circular tube. The production technology of national standard carbon steel spiral pipe can be divided into cold drawing and hot rolling. The production process of cold-rolled spiral pipe is generally disordered compared with hot rolling. The tube blank shall be continuously rolled with three rollers first, and the sizing test shall be carried out after kneading. If there is no crack on the surface, the round pipe shall be cut through the cutter, and the billet with a growth of about one meter shall be cut. Then enter the annealing process. Acid pickling shall be carried out with acid liquid for annealing. When pickling, attention shall be paid to whether there are many blisters on the surface. If there are many blisters, it is assumed that the quality of steel pipe can not meet the corresponding standard. In appearance, the cold-rolled spiral steel tube is shorter than the hot-rolled spiral steel tube. The wall thickness of the cold-rolled spiral steel tube is generally smaller than that of the hot-rolled spiral steel tube. However, the surface of the cold-rolled spiral steel tube is brighter than that of the thick-walled spiral steel tube. There is not too much roughness on the surface and too much burr on the diameter. At present, the inventory of the management factory is at a low level, although there is no risk, but the continuous price increase has disrupted the pace of market replenishment, and the mentality of the merchants is slightly poor. Market price comparison with straight seam pipeThe seamless tube market is relatively calm. Although the price of tube blank is rising slightly, the tube factory has no price adjustment dynamics, and the traders also keep stable. Only a few market prices rise narrowly. Because the actual market demand follow-up is not obvious, the downstream users are mostly buying as they use, so they dare not trade and hoard goods, so the market price is relatively stable, and the merchants are still cautious. Considering that at present, the transaction at the raw material end can still be supported strongly, and the willingness of merchants to hold up the price is strong, but the rainy season has started in some regions since June, which restricts the delivery and investment of the pipe market, and the driving force of the continuous increase in the later period is still limited, so it is expected that the market management in the future will narrow the increase or adjust the high level, with a range of about 20-50. Youte steel: this week, the prices of various varieties of special steel market are relatively strong, with an increase of 50-100.

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