Steel companies are losing money

 　　The editorial center of China Seamless Pipe Network was informed that steelmaking steel companies in most areas of the steelmaking industry are currently in a state of loss, and there are many enterprises that have stopped production and maintenance, and a few enterprises have begun to produce foundry steel to produce steel and steel. Although the steel market price fluctuated upwards, the steel mills' purchase of steelmaking steel was not high, steelmaking and steel transactions were not smooth, and the price rebounded weakly. It is expected that there will be no major fluctuations in the steelmaking steel market in the short term. Casting steel This week, the foundry steel market has a strong wait-and-see atmosphere, and transactions in some areas have improved.
　　
　　No. 45 seamless steel pipe is made of steel ingot or solid tube blank by perforation, and then made by hot rolling, cold rolling or cold drawing. 45 seamless steel pipe is a kind of material in steel, which belongs to high quality carbon structural steel. A large number of mold production companies will use it to make mold steel.
　　
　　20# seamless steel pipe is low carbon steel pipe. Carbon steel is generally divided into low carbon steel, medium carbon steel and high carbon steel. Among them, 45# steel is medium carbon steel, lower than 45# is low carbon steel, higher than 45# is high carbon steel. If there are no special requirements for seamless steel tubes, 20# seamless steel tubes are generally used.
　　
　　The galvanized square tube is a hollow square section steel tube with a square cross-sectional shape and a shape obtained by hot-rolling or cold-rolling galvanized steel strip or galvanized coil as a blank after cold bending forming and then high-frequency welding. Or a galvanized square tube made of cold-formed hollow steel pipe which has been prepared in advance and then hot dip galvanized.
　　
　　The editorial center of China Seamless Pipe Network was informed that the yield point (σs) has a yielding metal material, and the stress at which the sample can continue to stretch during the stretching (maintaining constant) is called the yield point. If the force drops, the upper and lower yield points should be distinguished. The unit of yield point is N/mm2 (MPa). The upper yield point (σsu) specimen yields a large stress before yielding and the force decreases; the lower yield point (σsl) is a small stress in the yielding phase when the initial transient effect is not counted.
　　
　　Classification Q345B seamless steel pipe is a kind of steel material, which can be divided into Q345A, Q345B, Q345C, Q345D, Q345E according to grade. What they represent is mainly the difference in temperature of the impact. Q345, is not to do the impact, Q345B grade, is 20 degrees normal temperature impact, Q345C grade, is 0 degree impact, Q345D grade, is -20 degree impact, Q345E grade, is -40 degree impact.
　　
　　It has good comprehensive mechanical properties, good weldability, cold, hot workability and corrosion resistance, good low temperature toughness and so on. Used in ships, boilers, pressure vessels, petroleum storage tanks, bridges, power station equipment, lifting transport machinery and other high-load welded structural parts. Q345, is not to do the impact, Q345B grade, is 20 degrees normal temperature impact, Q345C grade, is 0 degree impact, Q345D grade, is -20 degree impact, Q345E grade, is -40 degree impact. Overview of Q345E seamless pipe, Q345E seamless pipe specifications 8-1240×1-200mm. Q345E seamless pipe is a kind of steel Q345E seamless pipe analysis Q345E seamless pipe. The main characteristics of Q345E seamless pipe are good in comprehensive mechanical properties. The weldability belongs to low alloying steel plate and has low temperature impact performance. The steel grade consists of three parts: Chinese pinyin letters representing the yield strength, yield strength value and quality grade symbol. Where Q is the yield strength; 345 is the yield strength value in MPa; and E is the grade (by the -40 degree impact test).
　　
　　China Seamless Pipe Network Editing Center was informed: 3pe anti-corrosion seamless steel pipe consultation - Guanghui pipe outer wall anti-corrosion coating, pipe outer wall coating data type and application conditions, inner wall anti-corrosion coating to prevent pipe corrosion, reduce friction resistance forward transmission The film coated on the inner wall of the pipe, the anti-corrosion and heat-insulating coating is on the official road of medium and small-diameter heat transfer crude oil or fuel. In order to avoid the heat dissipation of the pipe to the soil, a composite layer of heat preservation and anti-corrosion is added to the outside of the pipe. If the outer protective tube is a polyethylene tube, there is no need to lose the anti-corrosion. Because polyethylene has excellent low temperature resistance, it has good chemical stability. From September 2015 to January 2016, the investment in infrastructure projects was again approved at 1.78 trillion yuan, which was at the peak of another round of project approval. Spray polyurea anti-corrosion construction is a new solvent-free, pollution-free green construction technology developed in recent years. The composition, performance index, quality control and application of polyurea anti-corrosion layer are discussed in detail. Spraying polyurea coating requires special spray coating equipment, which has extremely strict requirements on ambient temperature, material setting temperature and conveying pressure. The polyurea material can greatly improve the anticorrosion effect and service life of the metal through proper quality control and reasonable construction. The application examples show that the spray polyurea anti-corrosion coating technology is a construction technology with superior performance and wide application, and the application prospect is very broad. Construction process Before cleaning the leveling layer, use the cleaning tool to clean the leveling layer and thoroughly remove the cement ash, grease and other foreign matter on the cement surface. The cement floating foam, mold release agent and curing agent on the concrete surface shall be removed by means of steel brush, rock hammer and sand blasting. Nowadays, it has been widely used in the construction facilities of small and medium-sized construction sites, reducing the amount of civil construction and concrete by 90%, in the premise of meeting the use intensity. The oil general-purpose 3pe anti-corrosion steel pipe grid, the product obtained the average price of Ф25mm third-grade rebar in the country's key cities in China in 2009, 3051 yuan (ton price, the same below), up 28 yuan tomorrow; domestic key countryside Ф6.5mm high line average The price is 3,149 yuan, up 31 yuan from the previous day; the average price of 5.5mm hot rolled coil in the key rural areas in China is 3,393 yuan, up by 92 yuan from the previous day; the average price of 1.0mm cold plate in the domestic key towns and towns is 4,316 yuan, up from the previous day. 55 yuan; the average price of 20mm medium plate in key cities and towns in China is 3,187 yuan, which is 56 yuan higher than that of tomorrow. It uses the smaller diameter pipe to transport the same flow of fluid. The outer casing is mostly made of plastic or fiberglass, which reduces the earth excavation volume by more than half. The product is a two-component, high solids coating based on epoxy resin.