Stainless steel rectangular steel pipeWhat questions need to be referred to

No matter under dynamic load or static load, it has higher energy absorption capacity than austenitic stainless steel, which has obvious advantages and practical application value for structural parts to deal with sudden accidents such as collision, etc. Compared with austenitic stainless steel, duplex stainless steel has the following disadvantages: its universality and versatility are not as good as austenitic stainless steel. For example, its service temperature must be below 250 ℃.

Cold rolled non oriented silicon steel strip consists of nominal thickness (expanded by 100 times) + code a + iron loss guarantee value (the value after expanding the iron loss value when the frequency is 50Hz and the large magnetic flux density is 5T by 100 times). For example, 50a470 indicates that the thickness is 0.5mm and the guaranteed value of iron loss is & le; 7 cold rolled non oriented silicon steel strip.

.Stainless steel grade group 200 Series & mdash; Chromium nickel manganese austenitic stainless steel 300 series & mdash; Chromium nickel austenitic stainless steel model 301 & mdash; Good ductility, and the hot rolled steel strip has good ductility and toughness.

.Stainless steel pipe appeared in Foshan, Guangdong Province in the tenth generation of the last century. With the rapid development of science and technology in recent decades, stainless steel pipe production is all over the country. Stainless steel pipe is more and more widely used. But in fact, most people including many people in the industry, do not know much about the classification and application of stainless steel pipes. Take stainless steel pipe for example.

Prepare materials and tools, prepare corresponding materials and tools, the pipeline shall be insulated to prevent corrosion due to potential difference, and the external insulation cotton shall be wrapped for anti-corrosion treatment. Remember, never use glue and other materials that contain chloride ions, halogens and other corrosive effects on stainless steel pipes.

The Ministry of Commerce announced that the European Commission announced that it would impose a final anti-dumping duty of 43% ~ 79% on China's stainless steel seamless steel pipes exported to Europe, which made the steel pipe enterprises already under the pressure of domestic and foreign troubles worse.

Austenitic stainless steel has good resistance to uniform corrosion, but there are still the following problems in local corrosion resistance: intergranular corrosion of austenitic stainless steel. Austenitic stainless steel will have intergranular corrosion when it is kept warm at 450 ~ 850 ℃ or cooled slowly. The higher the carbon content, the greater the tendency of intergranular corrosion. In addition, intergranular corrosion also occurs in the heat affected zone of the weldment. This is due to the precipitation of Cr rich Cr23C6 on the grain boundary. The chromium poor area is formed in the surrounding matrix, which is caused by corrosion of the primary cell. This intergranular corrosion phenomenon also exists in the ferritic stainless steel mentioned above.

Stainless hot plate (grade I) GB4239-91 stainless cold strip (grade I)

Standard requirements.The Chinese brand cold rolled non oriented silicon steel strip (sheet) represents: DW + 100 times of iron loss value (at the frequency of 50Hz, the waveform is sinusoidal, and the magnetic induction peak is 5T per unit weight iron loss value) + 100 times of thickness value. For example, dw470-50 represents cold rolled non oriented silicon steel with iron loss value of 7W / kg and thickness of 0.5mm. Now the new model is represented as 50W470.

The Chinese brand cold rolled non oriented silicon steel strip (sheet) represents: DW + 100 times of iron loss value (at the frequency of 50Hz, the waveform is sinusoidal, and the magnetic induction peak is 5T per unit weight iron loss value) + 100 times of thickness value. For example, dw470-50 represents cold rolled non oriented silicon steel with iron loss value of 7W / kg and thickness of 0.5mm. Now the new model is represented as 50W470.

If the thickness of the steel plate is not enough, the professional stainless steel plate, stainless steel coil,Stainless steel water pipe, stainless steel belt and stainless steel pipe are strictly tested and the quality is guaranteed. The preferential activities are in progress. Welcome to consult. It is easy to bend,2205 stainless steel plate, which will affect the production of decorative plate. If the thickness is too large and the steel plate is too heavy, it will not only increase the cost of the steel plate but also bring unnecessary difficulties to the operation. At the same time, but the thickness of the same steel plate shall be as consistent as possible. Generally the allowance that should be left during processing or use of stainless steel plate shall also be considered. The thickness of copper plate is not absolutely consistent, for medium-sized saw plate, the thickness tolerance is 0.05-0.15mm. If the requirements are too strict, it is a structural steel plate with high resistance and high degree. The greater the mechanical damage resistance, the longer the service durability, but the grinding and processing cost is also relatively high.

Under plasma arc cutting corrosion conditions, there are dust containing other metal elements or attachments of dissimilar metal particles on the surface of stainless steel. In the air,304 thick wall stainless steel pipe, the condensate between the attachments and stainless steel connects them into a micro battery, which causes electrochemical reaction and the protective film is affected, which is called electrochemical corrosion.

Discount.Air pressure and water pressure test: conduct water pressure test for pressure resistant pipes one by one, and keep it for no less than 5 seconds at the specified pressure value. The water pressure test of conventional supply is 45MPa. The air pressure test is p = 0.5mpaa.

The slab solidified on the surface continues to be rapidly cooled through the secondary cooling section until the core becomes solid, and the whole continuous casting process of stainless steel pipe fittings is completed.

Carbon structure delivery status: delivered in heat treatment (annealing, normalizing, tempering after normalizing, high temperature tempering).

.The thickness of cold rolled steel strip is ultra-thin, and the thickness of hot rolled steel strip is large.

　　·Pulp and paper industry classifier, bleaching equipment, storage and treatment system.

The allowable depth of stainless steel straight track is also required. For hot-rolled and hot-rolled steel pipes, stainless steel pipes with diameter less than or equal to 140mm and not greater than 5% of the nominal wall thickness, the large depth is less than or equal to 0.5mm, and the large depth is less than or equal to 0.3mm.