Stainless stee
Stainless steeAccording to the purpose, it is mainly divided into oil well pipe (casing oil pipe and drill pipe), pipeline pipe, boiler pipe, mechanical structure pipe, hydraulic prop pipe, gas cylinder pipe, geological pipe, chemical pipe (high-pressure fertilizer pipe, petroleum cracking pipe) and marine pipe. Calculation formula for weight of stainless steel square tube: (nozzle perimeter 14 - actual thickness) actual thickness is 0.02491, of which 0.02491 is a constant converted from stainless steel density.
(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
.In engineering, the following methods are often used to prevent intergranular corrosion: reduce the amount of carbon in steel so that the amount of carbon in steel is lower than the saturated solubility of austenite in equilibrium, that is, the requirement of intergranular corrosion resistance can be met when the amount of carbon in steel is reduced to less than 0.03%.
Han Jianbiao, an analyst at Zoomlion steel, pointed out that since China's steel pipe exports have been only 30000 or 40000 tons per month, of which seamless pipe exports are only about 10000 tons per month.
.According to different metallographic structure of stainless steel, it is divided into semi Ferritic and semi martensitic stainless steel pipe, martensitic stainless steel pipe, austenitic ferritic stainless steel pipe, etc.
2 physical properties chemical composition C: it is specified in, which is usually also called mo2ti or mechanical properties ys (MPA)
Someone asked whether the stainless steel pipe was rusted and caused toxic problems?
— After that, it is also made & ldquo; Marine Steel & rdquo; To use. SS is usually used in nuclear fuel recovery units. Grade 1810 stainless steel generally meets this application grade. [1] Model 321 & mdash; Except that the risk of weld corrosion of the material is reduced due to the addition of titanium, other properties are similar.
The shape of pipe end stainless steel pipe can be divided into smooth pipe and threaded pipe (threaded steel pipe) according to the state of pipe end. Threading pipe can also be divided into ordinary threading pipe (pipe for conveying low pressure such as water and gas, which is connected by ordinary cylindrical or conical pipe thread) and special threaded pipe (pipe for petroleum and geological drilling,Stainless steel binding tape, which is connected by special thread for important threading pipe). For some special pipes, in order to make up for the impact of thread on the strength of pipe end, the pipe end is usually thickened before threading (inner thickening, outer thickening or inner and outer thickening).
For example if the actual thickness of stainless steel 51 round pipe is 0.9, the weight of a single 6-meter-long stainless steel pipe is (51-0.90.920.024916 = 87kg, and the theoretical weight of a 6-meter-long 51 round pipe is 0.92. For example, the weight of a single 6-meter-long stainless steel pipe of stainless steel square pipe 7545 with a thickness of 0.92 is [(75 + 4214-014-0.920.920.024916 = 38kg). If the weight of stainless steel pipe per meter is calculated, the length can be changed into one meter.
Where to sell API. 440— High strength cutting tool steel, with slightly higher carbon content, can obtain higher yield strength after appropriate heat treatment, and the hardness can reach 58hrc. It belongs to hard stainless steel. A common application example is & ldquo; Shaving blade & rdquo;. There are three common models: 440C and 440f (easy to process).
When transporting domestic and drinking water, the pipeline shall not pass through the toxic pollution area. If necessary, protective measures shall be taken.
The application of stainless steel pipe in the automobile industry is developing rapidly. In recent ten years, stainless steel pipe materials have been widely used in public transportation tools such as buses, high-speed railway vehicles, household cars and so on!
The corrosion resistance of duplex stainless steel, which is widely used in many media is better than that of ordinary l austenitic stainless steel, such as acetic acid and formic acid while super duplex stainless steel has very high corrosion resistance. In some media, it can even replace high alloy austenitic stainless steel and even corrosion resistant alloy.
equipment maintenance .If the thickness of the steel plate is not enough, the professional stainless steel plate, 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, 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, for medium-sized saw plate, the thickness tolerance is 0.05-0.15mm. If the requirements are too strict, the grinding cost will also increase. Generally, 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.
Section shape stainless steel pipe can be divided into round pipe and special-shaped pipe according to the section shape. Special shaped tubes include rectangular tubes, rhombic tubes,Ocr25Ni20 stainless steel plate, elliptical tubes, hexagonal tubes, octagonal tubes and various cross-section asymmetric tubes. Special shaped pipe is widely used in various structural parts, tools and mechanical parts. Compared with circular pipe, special-shaped pipe generally has large moment of inertia and section modulus, and has large bending and torsion resistance, which can greatly reduce the structural weight and save steel.
5: stainless steel wire: it can also be called stainless steel wire, coil rod and coil yuan,Stainless steel bright annealed tube, but it is different from stainless steel wire rope. Wire rod mainly includes spring wire and screw wire, professional stainless steel plate, stainless steel coil, stainless steel belt, stainless steel pipe and other special products. It is a 20-year-old brand with advantages in price and guaranteed quality. As the name suggests: screw wire is mainly used to make screws, The spring wire is used to make springs or other hardware products required. Others, such as bright wire, hydrogen withdrawal wire, electrolytic wire, etc. the tensile strength is 1500-2000. The hardness of spring wire is as follows: fully soft | 1 / 4 hard | semi hard | 3 / 4 hard | fully hard | extra hard. Steel wire rope gauge: 7 * 1,6 * 12,7 * 7,7 * 19,17 * 39, etc., which is higher than that of wires, rods and tubes of the same material, 304 stainless steel is a kind of high alloy steel that can corrode in air or chemical corrosion medium. Stainless steel has beautiful surface and good corrosion resistance. It does not have to go through surface treatment such as color plating, but gives full play to the inherent surface properties of stainless steel. It is used in many aspects of steel, which is usually called stainless steel. Representative properties include 13 chromium steel, 18-8 chromium nickel steel and other high alloy steels.
.For example, if the actual thickness of stainless steel 51 round pipe is 0.9, the weight of a single 6-meter-long stainless steel pipe is (51-0.90.920.024916 = 87kg, and the theoretical weight of a 6-meter-long 51 round pipe is 0.92. For example, the weight of a single 6-meter-long stainless steel pipe of stainless steel square pipe 7545 with a thickness of 0.92 is [(75 + 4214-014-0.920.920.024916 = 38kg). If the weight of stainless steel pipe per meter is calculated, the length can be changed into one meter.
Stainless steel capillary material: SUS301 / sus; Inner diameter 4mm-10mm, polished. Purpose of stainless steel capillary: automatic instrument signal tube, automatic instrument wire protection tube; Precision optical ruler circuit, industrial sensor, electronic equipment circuit protection tube; Safety protection of electrical circuit, capillary protection of thermal instrument and internal support of air core high-voltage optical cable. Stainless steel capillary characteristics: it has good resistance, corrosion resistance, high temperature resistance, wear resistance, tensile resistance, water resistance, and provides excellent electromagnetic shielding performance. Stainless steel hose can be bent into various angles and radius of curvature, and has the same durability and durability in all directions; The stainless steel hose has flexible pitch, good flexibility and no blocking and stiffness; The stainless steel threading hose has certain tension resistance between the side buckles of each section to prevent the internal laying of the hose from outside. It is a special product manufacturing enterprise integrating R & D, and service. It has long been specialized in stainless steel plate stainless steel coil and stainless steel belt, Stainless steel pipe. The axial tension can withstand 6 times of the nominal inner diameter. The yield strength of duplex stainless steel is more than twice that of ordinary austenitic stainless steel. This characteristic makes the designer reduce the weight when designing products, making this alloy more cost-effective than 317L. This alloy is especially suitable for - 50 DEG; F/+600° F temperature range. For applications beyond this temperature range, this alloy can also be considered, but there are some, especially for welded structures& middot;Pressure vessel, high pressure storage tank, high pressure pipeline, heat exchanger (chemical processing industry).
If packing is not required, it shall be indicated in the contract and will not bear the problem of scratching and scratching the surface of stainless steel pipe due to opening the packing bag.