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304ti stainles300 series & mdash; Chromium nickel austenitic stainless steel.
(II) The price of steel has been running at a low level. From January 31 to June 2012, the overall performance of the domestic steel market was depressed. With the substantial release of crude steel production capacity, the market supply and demand fell into an imbalance, and the steel price entered a downward channel, which has been weak for more than four months. As of June 26, 2013, the steel price index had dropped to 100.48 points, lower than the first 6 points. The prices of eight steel varieties mainly counted by the iron and steel industry association were lower than the first 6 points
.3. Domestic wce20 cerium tungsten electrode is used for electrode data. The shape and diameter of the end of cerium tungsten electrode have a great impact on the fluctuation of welding process and weld formation.
The thickness of cold rolled steel strip is ultra-thin, and the thickness of hot rolled steel strip is large.
.The application range is wider than that of ferritic stainless steel. Compared with ferritic stainless steel, duplex stainless steel has the following disadvantages: high alloy element content and relatively high price. Generally,304 stainless steel pipe price, ferritic stainless steel does not contain nickel.
Manufacturing process hot rolling (seamless steel pipe): round tube blank → Heating → Perforation & rarr; Three roll cross rolling, continuous rolling or → Off pipe & rarr; Sizing (or reducing) → Cooling → Straightening & rarr; Hydrostatic test (or flaw detection) → Mark & rarr; The raw material for warehousing and rolling seamless pipe is round pipe blank. The round pipe blank shall be cut and processed by cutting machine, and the blank with a growth of about 1m shall be brought to the furnace for heating. The billet is sent to the furnace for heating at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature in the furnace is the key problem. After the round tube billet is discharged from the furnace, it should be pierced through the pressure piercer. Generally, the more common piercer is the cone roll piercer. This piercer has high production efficiency and good product quality. It is specialized in stainless steel plate, stainless steel belt and stainless steel pipe, good waterproof performance, fire and high temperature resistance, strong overload capacity, radiation protection, long service life, large perforation diameter expansion, and can wear a variety of steel grades. After perforation, the round tube blank is successively rolled by three roll cross rolling,310S stainless steel plate, continuous rolling or rolling. Take off the pipe after sizing. The conical drill bit of the sizing machine rotates into the steel embryo at high speed to form a steel pipe. The inner diameter of the steel pipe is determined by the outer diameter length of the sizing machine bit. After sizing, the steel pipe enters the cooling tower for water spray cooling. After cooling, the steel pipe will be straightened. After straightening, the steel pipe is sent to the metal flaw detector (or hydrostatic test) for internal flaw detection. If there are cracks, bubbles and other problems inside the steel pipe, they will be detected. Steel pipes should be strictly selected manually after quality inspection. After the steel pipe is inspected, the number, specification, production batch number, from the current situation of China's stainless steel foreign trade, China's stainless steel export has encountered great resistance.
Both ends of the steel pipe shall be cut into right angles and burrs shall be removed.
Stainless steel pipes are divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes,Stainless steel welded pipe, alloy steel pipes, bearing steel pipes, stainless steel pipes, bimetallic composite pipes, coated and coated pipes to save precious metals and meet special requirements. Stainless steel pipes have a wide variety, different uses, different technical requirements and different production. The outer diameter range of steel pipe currently produced is 0.1 & mdash; 4500mm, wall thickness range 0.01 ~ 250mm. In order to distinguish its characteristics we specialize in providing quality assurance for L stainless steel pipe, s stainless steel pipe and 904L stainless steel pipe. During the preferential activities, new and old customers are welcome to consult. Steel pipes are usually classified according to the following.
Production process of hot rolled stainless steel strip / coil: 1. Pickling → 2. High temperature rolling → 3. Process → 4. Annealing → 5. Leveling → ⒍ fine cutting → ⒎ packaging → 8. Reach customers.
target.The Chinese brand of stainless steel plate is 0cr18ni12mo3ti (0Cr18Ni12Mo2Ti with paper should also be this brand). The new brand is 06cr17ni12mo2ti stainless steel plate. The stainless steel plate is added with Ti in SUS316 steel to improve the intergranular corrosion resistance. It is applied to the equipment of, phosphoric acid, acetic acid and acetic acid.
·Pulp and paper industry classifier bleaching equipment, storage and treatment system.
The atoms around the gap rearrange with time, resulting in the continuous accumulation of holes, weakening the material, and finally forming macro cracks, resulting in the fracture of stainless steel pipe material. Compared with room temperature, high temperature promotes the accelerated oxidation of materials and the accelerated diffusion of atoms. Under the action of stress, the interaction between internal defects and dislocations can significantly reduce the low cycle fatigue performance of stainless steel tubes. The law of creep deformation of stainless steel pipe can be described by creep curve, which reflects the relationship between deformation and time under specific temperature and stress structure. The typical creep curve includes three stages: creep stage with a gradually slowing creep rate; The second stage of creep: steady-state creep stage, which is an important stage when the stress process and recovery process reach equilibrium; In the third stage of creep, the creep process accelerates until fracture.
The surface quality, appearance and dimensional accuracy of cold rolled steel strip are better than those of hot rolled plate.
Focus on Development.）
Decorative stainless steel pipe: usually the outer wall is relatively bright, so its name is considered. Decorative stainless steel pipe is used for decorative purposes. The stainless steel pipe for general decorative purposes is relatively thin. Because it is different from the manufacturing process of stainless steel product pipe, the price also varies greatly. The general production process of decorative stainless steel pipe is ordinary welded stainless steel pipe. Guangdong stainless steel product pipe stainless steel product pipe: generally, the surface of stainless steel product pipe is also a bright surface, and a small number of pipes with acid pickling industrial surface. As mentioned above, stainless steel product pipe belongs to the purpose of stainless steel products, because the outer diameter size mechanical properties, acid, alkali and corrosion resistance of stainless steel pipe are relatively good, Therefore, stainless steel pipes are generally used as anti-corrosion materials or hardware products in large-scale production enterprises. The production process of stainless steel pipes is one-time forming, and nitrogen protection is also added during welding.
Doing well in marketing strategy innovation is a very key factor for every manufacturer joining stainless steel pipe to realize the marketing effect of market competition; However, due to the different characteristics of each market, stainless steel pipe manufacturers need to make different marketing strategy adjustments; As the saying goes, & ldquo; No matter what kind of cat it is, catching mice is a good cat& rdquo; Professional projects include: stainless steel plate, stainless steel coil, stainless steel belt, stainless steel pipe and other related businesses. Merchants who hope to have this business please. This is also true in the marketing strategy. Therefore, manufacturers of stainless steel pipes need to make marketing innovation at any time to match the changing market conditions.
.In the past few years, the United States has imposed anti-dumping and countervailing duties on a variety of steel pipe products exported from China, rectangular pipe, pipeline pipe, welded stainless steel pressure pipe, oil well pipe and seamless steel pipe. These foreign double back pressures have greatly reduced the number of steel pipes exported by China.
It has lower linear coefficient than austenitic stainless steel and is close to carbon steel. It is suitable for connection with carbon steel and has important engineering significance, such as the production of composite plate or lining.
The main function of chromium is the organizational structure of. Chromium has high chemical stability, can form a passive film on the steel surface isolate the metal from the outside, protect the steel plate from oxidation and increase the corrosion resistance of the steel plate. After the passivation film, the corrosion resistance decreases.