In order to protect the welding pool well with argon and facilitate the welding operation, the center line of tungsten electrode and the workpiece at the welding position shall be kept 80 ~ 85° Angle, the included angle between filler wire and workpiece surface shall be as small as possible, generally 0-DEG; about.
The stainless steel pipe installed on the pipeline support can be corroded by 200 ppm chloride ion and 2 ppm residual chlorine in an aerobic environment. For carbon steel structural supports, 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.
.In many construction sites, we use this kind of welding for priming, which can effectively ensure its quality and has certain construction difficulties. Therefore, careful and skilled welders should be selected for this work.
For the length of welding arc, 2 ~ 4mm is better for ordinary steel welding, and ~ 3mm is better for stainless steel welding. If it is too long, the protection effect is not good.
. 302— The corrosion resistance is the same, normalizing, tempering after normalizing, high temperature tempering).
The cold working process performance and cold forming performance are much better than that of ferritic stainless steel.
Theoretical weight of stainless steel pipe: w = outer diameter - wall thickness x wall thickness x0.02491.
Construction materials shall be prepared and delivered to the site according to the data scheme, and shall be supplied according to the scheme.
Cold rolled oriented silicon steel strip (sheet) represents: 100 times of DQ + iron loss value (at the frequency of 50Hz, the waveform is sinusoidal, and the magnetic induction peak value is the unit weight iron loss value of 7T) + 100 times of thickness value. Sometimes, G is added after the iron loss value to represent high magnetic induction. For example, dq133 represents cold rolled oriented silicon steel strip (sheet) with iron loss value of 3 and thickness of 0.3mm. Now the new model is 30q133.
Quality department.Low temperature processing --- martensitic stainless steel is quenched from austenitizing temperature and then cooled to very low temperature to promote the quenching of martensite. It is suitable for stainless steel which is easy to produce retained austenite.
2 physical properties chemical composition C: it is specified in, which is usually also called mo2ti or mechanical properties ys (MPA)
The welding performance is also much better than that of ferritic stainless steel. Generally, preheating is not required before welding and heat treatment is not required after welding.
Allowable depth of straight track: hot rolled and hot-rolled steel pipes with diameter less than or equal to 140mm shall not be greater than 5% of the nominal wall thickness, and the large depth shall not be greater than 0.5mm; cold drawn (rolled) steel pipes shall not be greater than 4% of the nominal wall thickness, and the large depth shall not be greater than 0.3mm.
Scheme customization.Usage: widely used in automobile, tractor and other industries.
For example, the price of 10000 tons of goods 04 = 963846 tons = the result example: the price excluding tax of 1 ton of goods = 15800 a ton 04 = 15193077 ~ the total weight of the known coil weight and price = the coil weight price, the thickness of stainless steel plate & Chi; Width & Chi; Long & Chi; 93 e.g. 0 & Chi; 22Χ 44Χ 93 = 42kg stainless steel plate weight per square meter (kg) calculation formula: specific gravity thickness (mm) width (mm) length (m) stainless steel weight per meter (kg) stainless steel pipe calculation formula: diameter (mm) diameter (mm) (correct calculation of the price difference between burr and trimming of nickel stainless steel 0.0062 chromium stainless steel) in the market, the price difference between burr and trimming of stainless steel is usually set at a fixed price. For example, it is generally considered in the market that the price difference between burr and trimming of 201 is 200 yuan tons and that of 201 is 300 yuan tons. In fact this method is not scientific. In fact, the price difference between burr and trimming of stainless steel is different The correct calculation should be like this.
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.
.Summary of plate manufacturing method according to surface characteristics surface characteristics application silver white matte hot rolled to the specified thickness and then annealed and descaled. A rough and matte surface does not need surface gloss. Silver white cold rolled heat treatment and pickling 2D products are used for applications with lax surface requirements. For general materials, the gloss of deep drawing materials is stronger than that of D treatment, After finishing a light cold rolling with polishing roller, the general material Ba is as bright as a mirror. There is no standard,Price of stainless steel plate, but it is usually the surface processing of bright annealing, and the surface reflectance is very high. For building materials, 100 ~ 200 # (unit) abrasive belt is used for kitchen coarse grinding to grind building materials, stainless steel coil and stainless steel belt,405 stainless steel plate, Stainless steel pipe quality assurance. New and old customers are welcome to consult during the preferential activities. HL hair line grinding in the kitchen is carried out by grinding materials with appropriate particle size for hair line grinding (150 ~ 240#). There are many buildings and building materials close to mirror grinding. 600# rotary polishing wheel is used for grinding for art, mirror grinding for decoration, and polishing wheel is used for grinding reflector, For decoration, according to the purpose, bridge steel plate, boiler steel plate, shipbuilding steel plate, armored steel plate, automobile steel plate, roof steel plate, structural steel plate, electrical steel plate (silicon steel sheet), special solar plate (Hairui special steel) are common Japanese brands in other steel plates for ordinary and mechanical structures.
302— The corrosion resistance is the same, and the strength is better because the carbon content is relatively high.
Seamless stainless steel pipe, also known as stainless steel pipe, is made of steel ingot or solid pipe blank through perforation and then made by hot rolling, cold rolling or cold drawing. The specification of seamless steel pipe is expressed by outer diameter * wall thickness mm. With the implementation of China's reform and opening up, the national economy has achieved rapid growth, and a large number of urban houses, public buildings and tourism facilities have been built, which puts forward new requirements for hot water supply and domestic water supply. In particular, people pay more and more attention to the problem of water quality, and the requirements are also increasing. Galvanized steel pipe, a common pipe, will gradually withdraw from the historical stage under the influence of relevant countries because of its corrosivity. Plastic pipe,25 stainless steel pipe, composite pipe and copper pipe have become common pipes in the pipeline system. However, under certain circumstances, stainless steel pipe has more advantages, especially the stainless steel pipe with wall thickness of only 0.6 ~ 2mm. In high-quality drinking water system, hot water system and water supply system that puts safety and sanitation first, it has the characteristics of safety, reliability, sanitation, environmental protection, economy and applicability. It has been proved by engineering practice at home and abroad that it is one of the new energy-saving and environmental protection pipes with good comprehensive performance of water supply system. It is also a very competitive water supply pipe