201 stainless 
201 stainless 400 series & mdash; Ferritic and martensitic stainless steel.
300 series & mdash; Chromium nickel austenitic stainless steel.
.5. It is our responsibility not to pay attention to the maintenance of the pipe during transportation, mix the pipe with corroded chemical commodities, or soak the two water into the packaging film during transportation in rainy days which will cause rust. 6. It is the responsibility of the processor and manufacturer. When cutting stainless steel or iron when manufacturing goods, the scrap iron will cause rust on the surface of the steel pipe. Therefore, it is only reasonable for highly skilled technicians to deepen investigation and discussion, make a reasonable division of responsibilities, pipe factories, processors, or users bear the liability for compensation!
Cold rolled oriented silicon steel strip consists of nominal thickness (expanded by 100 times) + code G: ordinary material, P: high oriented material + guaranteed iron loss value (the value after expanding the iron loss value when the frequency is 50Hz and the large magnetic flux density is 7T by 100 times). For example, 30g130 indicates that the thickness is 0.3mm and the guaranteed value of iron loss is ≤ 3 cold rolled oriented silicon steel strip. Liaocheng Suntory stainless steel provides electroplated tin plate and hot-dip galvanized plate: electroplated tin plate, electroplated tin sheet and steel strip, also known as tinplate. The surface of the steel plate (belt) is plated with tin,Stainless steel separator, which has good corrosion resistance. In addition, it can be used as packaging material for cans, inner and outer sheath of cables, instrument and telecommunication parts, flashlight and other hardware.
.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, Aomori County, the development of stainless steel pipe manufacturers is faltering. However, it can be seen from some relevant data that the overall market potential is still great. Stainless steel pipe connection manufacturers should know how to proceed step by step and make steady progress in order to have a chance to win the market.
The dual phase microstructure of stress corrosion resistant stainless steel is helpful to improve the stress corrosion cracking resistance of stainless steel. In the presence of certain temperature stress, chloride stress corrosion will occur in austenitic stainless steel. Since these conditions are not easy oxygen and chloride, the use of L and 317L is limited in this regard.
Check whether the sealing ring of pipe fittings is complete and clean and whether the placement position is correct. If there is dirt, it must be cleaned up. If the sealing ring is damaged, it must be replaced again.
Stainless steel has two classifications: one is divided into chromium stainless steel and chromium nickel stainless steel according to the characteristics of alloy elements; The other is divided into m stainless steel, f stainless steel a stainless steel and A-F duplex stainless steel according to the microstructure of steel in normalized state.
Check whether the sealing ring of pipe fittings is complete and clean and whether the placement position is correct. If there is dirt, it must be cleaned up. If the sealing ring is damaged, it must be replaced again.
Inspection basis.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)
(I) The output reached a record high. From January to June, 2013, the country produced 900 million tons of crude steel, an increase of 4% year-on-year, an increase of 6 percentage points over the same period last year. In the first six months, the average daily output of crude steel was 240000 tons, equivalent to the level of 8.6 billion tons of crude steel. Among them, it reached a record high of 2.208 million tons in February. Although it fell from March to June, it still remained at a high level of more than 2.1 million tons. From January to June, according to provinces and regions, The crude steel output of Hebei and Jiangsu increased by 8% and 2% respectively year-on-year. The total new output of the two provinces accounted for 44% of the national increase of 26.94 million tons. In addition, the output of Shanxi, Liaoning, Henan and Yunnan also increased by more than 1 million tons. According to the types of enterprises, the crude steel output of key large and medium-sized iron and steel enterprises increased by 5% year-on-year from January to June, 2 percentage points lower than the national average increase. The professional L stainless steel pipe and s stainless steel pipe Steel pipe and 904L stainless steel pipe have high pressure rating, good waterproof performance,430F stainless steel plate, fire and high temperature resistance, strong overload capacity, corrosion resistance, radiation protection and long service life. However, 60% of the increase in production still comes from key large and medium-sized iron and steel enterprises.
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.
In the building water supply pipe system, since the galvanized steel pipe has ended its glorious history of one hundred years, various new plastic pipes and composite pipes have developed rapidly. The professional stainless steel plate, stainless steel coil, stainless steel belt and stainless steel pipe have advanced technology, more affordable price and more preferential treatment. Welcome to consult. However, there are still some deficiencies in various pipes to varying degrees, It is far from fully meeting the needs of water supply pipeline system and national requirements for drinking water and related water quality. Therefore, relevant experts: building water supply pipes will eventually return to the era of metal pipes. According to foreign application experience, stainless steel pipe is recognized as one of the pipes with good comprehensive performance in metal pipe. Chemical analysis: carry out chemical analysis on the chemical composition of the material, and the chemical composition meets the requirements
how much.Relevant information stainless steel export is an important part of China's export economy. It plays an important role in stimulating China's economic growth. However, from the current situation of China's stainless steel foreign trade, China's stainless steel export has encountered great resistance.
Typical ferritic stainless steels are Crl7, Cr25 and Cr28.
In order to ensure that the mechanical properties such as yield strength, tensile strength, elongation and hardness of various stainless steel coils meet the requirements the stainless steel coils must undergo heat treatment such as annealing, solution treatment and aging treatment before delivery. The corrosion resistance of stainless steel coil mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and the interior of stainless steel coil
.China's numbering rules adopt the use of element symbols and Chinese pinyin. Open hearth steel: P, boiling steel: killed steel: class a steel: T8: Special: ball joint steel and spring steel, such as 20CrMnTi 60simn,SUS304 stainless steel pipe, (C content is expressed in tens of thousands)
In view of the external export difficulties, on the one hand, China's stainless steel industry needs to improve, but it is important for China's stainless steel industry to continuously improve its quality level and comprehensively upgrade.
Chinese brand cold rolled non oriented silicon steel strip (sheet) means: DW + 100 times of iron loss value (at the frequency of 50Hz, the magnetic induction peak with sinusoidal waveform is the unit weight iron loss value of 5t) + 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 50W470.