The hard copper tube is not artificially treated after being drawn or extruded, so that it can be naturally formed. At this time, the organizational form in the copper tube is full. This kind of copper tube is more likely to crack and is not suitable for bending. Therefore, the hard copper tube is generally straight.Disadvantages: Due to loose tissue and high pressure resistance, the pipe is only used to produce small air conditioning copper rods.Braun,Heat and insert the copper tube and sleeve, and move the flame nozzle back and forth continuously between two points. Do not touch the flame directly with the flux. When heating steel pipes, the temperature is slightly higher than when heating copper pipes.The price of pig iron market rose by - yuan this week, and the transaction was fair. With the increase of coke price, the cost of ductile iron in Shanxi, Henan, Shandong and other regions has increased. In addition, with the gradual release of downstream demand, the inventory of iron plants is not large and iron plants have successively raised their prices. There are few iron foundries in Shandong, Jiangsu,BraunQ345D alloy round steel, Hebei and Shanxi, and the inventory remains low. As the coke price rises and the cost increases, the price of iron foundries rises again.Miyazaki-shi,Red copper inventory may end the trend of continuous decline. With the increase of production restriction of steel enterprises and the pressure of demand, the continuous decline of iron ore port inventory may end. In addition, according to the new statistics of * *, the available days of imported iron ore of steel mills are days, which is one day lower than that before the National Day, and is on the high side of history. The steel mill said that at present, the steel mill is not willing to replenish the inventory.At present, the fundamentals faced by the domestic copper bar market are still mixed. On the one hand, but on the other hand, the northern market has entered the off-season of demand and the market s expectation of future demand is pessimistic. In the short term, domestic steel prices will enter the operating track of range consolidation. To sum up, considering the current situation of demand and inventory in the steel market it is difficult for the steel market to make a breakthrough. As the th National Congress of the Communist of China is approaching, environmental protection phenomena such as steel mills are still going on, and black series speculation is still taking place. But personally,Braun310s stainless steel plate, the fluuation range of the market in this region is limited, and businesses can operate flexibly on a short-term basis, and the shipment transaction is * * *.According to * * new data, in September , China s imported iron ore * * * broke through the million ton mark, reaching million tons, China s iron ore import increased by % to million tons, and the annual import volume is expected to exceed billion tons. However, judging from the shipment of imported ores after the National Day, due to the rapid declinecline in iron ore prices,Braun304 stainless steel plate, the iron ore price index once fell below $, which reduced the enthusiasm for the shipment of imported ores. In addition, environmental protection inspection has become stricter, and the supply of some domestic mines has been greatly affected. The current operating rate of domestic mines is percentage points lower than the previous peak, which is likely to decline further in the future.

antages: low production cost and high production efficiency.Dissolved oxygen in water is a major factor in copper pipe corrosion.Strong connection firmness of copper pipe: the connection between copper pipe and copper fittings is strong.High value,For small diameter pipes, when using filler metal, the length of filler metal is allowed to be equal to the diameter of the pipe, which is enough to fill the weld crater. One of the five major application fields of red coppr plate T, red copper bar and red copper tube: copper is the most widely used and used in the electrical and electronic industries, accounting for more than half of the total consumption. Used for various cables and wires, motors and transformers, switches and printed circuit boards; In the manufacture of machinery and transport vehicles, it is used to manufacture industrial valves and accessories, instruments, sliding bearings, molds, heat exchangers pumps, etc.Extrusion method: This production method is to cast copper ingots after smelting, and extrude copper tubes by large extruder after secondary heating.In the morning trading today, the price of domestic copper bar fell. According to the monitoring data of Lange Steel s cloud business platform, the average price of * mm hot rolled strip in key cities in China is , down yuan from yesterday. Futures prices fluctuated, and the prices of spot market manufacturers eased slightly today. According to the feedback the market was mainlysee yesterday, which caused the overall transaction blocked and the mainstream manufacturers prices fell today.

The production method of soft copper tube is basically the same as that of hard copper tube, that is, the annealing process is added compared with the hard copper tube. Annealing of copper tubes means that they are calcined in a high temperature furnace to change the arrangement of the elements in the copper tubes. However, after annealing, the copper tubes will become soft, which makes it easier to bend. The copper tubes produced in this way are called soft copper tubes.target, Jiangxin hot rolling is yuan, continuous casting yuan is down yuan, Dongfang hot rolling yuan is down yuan, Luli hot rolling yuan is down yuan, Tiangang hot rolling an is down yuan, production is stopped in mid January, Weigang hot rolling yuan is up yuan, continuous casting yuan is up yuan, Huaigang yuan is up yuan Zhongtian yuan, Changqiang yuan, Linggang yuan.{} The copper pipe welding can be divided into soft welding and hard welding. The soft welding temperature is lower than ℃, and the hard welding temperature is higher than ℃. Hard welding is usually used for silver, gold, copper and other metals. Its welding points are much stronger than soft welding, and its shear strength is - times that of soft welding.In terms of steel billets: at :, some steel billets in Changli were reduced by , and the current carbon square billets were delivered with tax of yuan. After the th National Congress of the Communist of China, the market had doubts about the uncertainty of environmental production restriction and was still waiting for a clearer direction. Therefore, it can be seen that at this stage, there was no unilateral market for either futures or cash, and there was no definite pattern of ups and downs. According to the monitoring data of Lange Iron and Steel s cloud business platform, as of the time of publication, Tianjin Youwelded Line: the steel mill reported: Rongcheng # yuan/ton, B yuan/ton; Jiujiang # - # to Tianjin yuan/ton; The arrival price of Xinji Aosen # is yuan/ton, and that of B steel is yuan/ton; Jiyuan # yuan/ton, B steel yuan/ton; Fulen # yuan/ton; Weigang # yuan/ton, B steel yuan/ton.Braun,Disadvantages: Due to loose tissue and high pressure resistance, the pipe is only used to produce small air conditioning copper rods.The blowing mouth of the welding tool should not be too small to avoid excessive concentration of heat.According to * * new data, in September , China s imported iron ore * * * broke through the million ton mark, reaching million tons, a record high; From January to September, China s iron ore import increased by % to million tons, and the annual import volume is expected to exceed billion tons. However, judging from the shipment of imported ores after the National Day, due to the rapid declinecline in iron ore prices, the iron ore price index once fell below $, which reduced the enthusiasm for the shipment of imported ores. In addition, environmental protection inspection has become stricter, and the supply of some domestic mines has been greatly affected. The current operating rate of domestic mines is percentage points lower than the previous peak, which is likely to decline further in the future.