904L stainless
Price of stainstainless steel pipe fittings generally adopt the same vertical
·Sewage treatment system.
The cold working process performance and cold forming performance are much better than that of ferritic stainless steel.
.After molten steel casting, vertical bending or arc continuous caster as carbon steel. The refined molten steel is poured into the ladle,410 stainless steel pipe, the ladle to be poured is transferred above the tundish mouth through the rotary table, and then the molten steel is tundish through the long nozzle. The molten steel in tundish enters the mold through the submerged nozzle for forming, condensation and continuous downward movement.
309— It has better temperature resistance.
.Mold cost: specifications are commonly used but not commonly used. Common specifications are rapid turnover and low mold sharing cost. Because of low utilization and high cost sharing,Stainless steel plate cleaning, it is a special enterprise integrating R & D, and service
After the stainless steel pipe is completed, it must be moved, moved and moved for a long distance. If there is no bag, there will be scratches and scratches on the surface, which will affect the appearance of the surface.
Delivery status: to be delivered after heat treatment and leveling.
The width of coiled material is variable, including 30mm.60mm.45mm.80mm.100mm.200mm, etc. it can also be divided according to customer requirements
Stainless steel pipe cost = actual thickness divided by thickness adjustment price + freight + processing fee. Coil price is switched to flat plate price = coil price, actual thickness adjustment + leveling fee 100. Flat plate price is switched to coil price = plate price, 07 is 7 points)
Cutting tool level & rdquo; Martensitic steel,201 stainless steel embossed plate, an early stainless steel similar to Brinell high chromium steel. It is also used for surgical tools, which can be made very bright.
Product survey.With the development of social economy, the application of stainless steel pipe has been more and more popular. It will bring new changes in various fields.
Classification and grading of standards 4-1 classification: national standard GB industry standard Yb local standard enterprise standard Q / cb4-2 classification: product standard packaging standard basic standard 4-3 standard level (divided into three levels): y level: international advanced level I level: international general level H level: domestic advanced level 4-4 national standard stainless steel bar (level I) gb4241-84 stainless welding disc Park (level H)
Corrosion resistance most stainless steel products require good corrosion resistance. Stainless steel pipe is similar to class I and II tableware, kitchen, water heater, water dispenser, etc. Some foreign businessmen also test the corrosion resistance of products: use NaCl aqueous solution to warm to boiling. After a period of time, the solution is to drain, wash and dry, and determine the weight loss to determine the degree of corrosion.
Ti-5a alloy with improved titanium and overall corrosion resistance has been used to manufacture u and Pu solution evaporation boilers and heat recovery evaporation boilers in Donghai reprocessing plant Japan. In addition, because zirconium has stable corrosion resistance in the environment, zirconium is used in its continuous dissolution tank in the reprocessing plant in liusuo village, Aomori County, Japan. The US Academy's ruling that the countervailing duty is not suitable for products from non market economy countries has just given China's steel pipe enterprises a little relief. The anti-dumping stick from the EU has given a heavy blow to hundreds of domestic stainless steel pipe manufacturers.
Welcome to inquire.The inner and outer surfaces of steel pipes shall be free of cracks, folds, crazing, cracks, rolling folds, delaminations and scabs. These defects shall be completely removed (except for pipes for machining). After removal, the wall thickness and outer diameter shall not exceed the negative deviation. Other minor surface defects that do not exceed the allowable negative deviation may not be removed.
Stress relief treatment. Stress relief treatment is a heat treatment process to eliminate the residual stress of steel after cold working or welding. It is generally heated to 300 ~ 350 ℃ for tempering. For steels without stabilizing elements Ti and Nb the heating temperature shall not exceed 450 ℃, so as to avoid intergranular corrosion caused by chromium carbide precipitation. For cold worked and welded parts of ultra-low carbon and stainless steel containing Ti and Nb, they need to be heated at 500 ~ 950 ℃ and then cooled slowly to eliminate stress (the upper limit temperature is taken for eliminating welding stress), which can reduce the tendency of intergranular corrosion and improve the stress corrosion resistance of steel.
7. Distinguish between 316L and 304L. There are two kinds of commonly used stainless steel 30316l (or corresponding to the German / European standard 430844036l, and it is generally recognized that 316 has better corrosion resistance than 304 in high temperature environment. Therefore, engineers generally choose 316L parts in high temperature environment. However, there is no absolute thing. In concentrated environment, 316L should not be used at any higher temperature! No However, this is a big problem. People who study mechanics have all studied threads. Remember a black solid agent that needs to be applied to prevent threads from biting under high temperature: molybdenum disulfide (MOS), from which two conclusions are drawn: No: [1] Mo is indeed a high resistance material (know what crucible gold is melted in? Molybdenum crucible!). [2] : molybdenum can easily react with high valence sulfur ions to form sulfide. Therefore, stainless steel is a steel with more impurities (but these impurities are more corrosion resistant than steel). If it is steel, it can react with other substances.
.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.
When selecting stainless steel water supply pipe, carefully observe whether the surface of the pipe is shiny, damaged and crushed, and pay attention to whether the incision is neat. If these phenomena occur, they should be carefully considered.
Low temperature embrittlement --- in low temperature environment, the deformation energy is small. In the low temperature environment, the phenomenon that the elongation and area shrinkage decrease is called low temperature embrittlement. Most of them are produced on the body centered cubic structure of ferrite series.