20 thick 304 s
Price of stainIn order to prevent water from serious pollution during storage and transportation, the water industry now generally uses stainless steel pipes to store and transport water. Because stainless steel pipes have anti rust, high temperature and high pressure resistance and good sanitary performance, stainless steel pipes are slowly used in the industrial field!.
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.
.AUSTENITIC FERRITIC duplex stainless steel on the basis of austenitic stainless steel, appropriately increase Cr content and reduce Ni content, various specifications of stainless steel plates, 1Cr21Ni5Ti stainless steel belts and stainless steel tubes are supplied in time and cost-effective. It has become the preferred brand for many wire products. Welcome to buy! Stainless steel with duplex structure of austenite and ferrite (including 40 ~ 60% & Delta; - ferrite) can be obtained. Typical steel grades include 0cr21ni5ti, ocr21ni6mo2ti, etc. Duplex stainless steel has good weldability,S30409 stainless steel plate, no heat treatment is required after welding, and its tendency of intergranular corrosion and stress corrosion is also small. However, due to the high Cr content, it is easy to form & sigma; Pay attention when using.
Usage: widely used in automobile, tractor and other industries.
.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.
The cold rolled steel strip has good strength and yield ratio and the hot rolled steel strip has good ductility and toughness.
2B cold rolling shall be subject to heat treatment, pickling or similar treatment, and then leveled to obtain appropriate gloss.
The folded stainless steel hot rolled strip is hot rolled into a strip with a thickness of 80mm-00mm and a width of 50mm-1200mm.
When using this process, the following key points should be paid attention to: during the welding process, the correct included angle between the welding handle, welding wire and weldment should be maintained. The ideal caster angle of the welding handle nozzle is 70 & deg; & mdash; 80 & deg;, and the included angle between the welding wire and the weldment surface is 15 & deg; & mdash; 20 & deg;; correct the molten pool temperature, change the included angle between the welding handle and weldment, change the welding speed etc. to change the molten pool temperature, so as to ensure Beautiful weld formation (uniform width, no concave convex and other defects) During operation, the current shall be slightly larger than that of solid core welding wire, and the welding handle shall be slightly adjusted to accelerate the separation of molten iron and molten flux coating, so as to facilitate the observation of molten pool and penetration; when filling the welding wire, it shall be sent to 12 places of molten pool and pressed inward slightly to ensure penetration and prevent concave; during welding, and the welding wire shall always be ensured Under the protection of argon to prevent the end of the welding wire from being oxidized and affect the welding quality; pay attention to the welding quality of the arc and arc stop, and the spot weld shall be polished to 45 & deg; the slope shall be gentle, and pay attention to the defects such as arc pit and shrinkage hole during arc stop.
Price of stainless steel pipe with 5mm diameter: according to the current market situation, the price of stainless steel pipe with 5mm diameter is 23300 yuan per ton.
Create brilliance.Corrosion test: the industrial corrosion-resistant steel pipes provided shall be tested for corrosion resistance according to the standard provisions or the corrosion agreed by both parties, and there shall be no tendency of intergranular corrosion.
Stainless steel pipe appeared in Foshan,Stainless steel pipe filter, 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,National standard for stainless steel pipe, including many people in the industry, carbon oxide and nitrogen oxide), in case of condensed water, acetic acid liquid points will be formed, which will lead to chemical corrosion.
High pressure water jet cutting (professional water cutting: Shanghai Xinwei)
Installation conditions.The inventory of stainless steel pipes may be an important factor in market conditions. This is because at this stage, steel inventory has become an important index to investigate and judge the situation of stainless steel pipeline shopping malls, and has become a wind vane to judge the future market trend. What was the stock of stainless steel tubes at that time? It directly affects the air of shopping malls, and then distributes the business behavior of participants in shopping malls
Accounting for about 8% - 16% of the total steel, it is widely used in the national economy. Because the steel pipe has a hollow section, it is suitable for gas and solid transmission pipelines; at the same time, compared with the round steel of the same weight, the steel pipe has large section coefficient and high flexural and torsional strength, so it has also become an important material in various machinery and building structures. Stainless steel is used Under the condition of equal weight, the structure and components formed by pipe have a larger section modulus than solid parts. Therefore, stainless steel pipe itself is an economic section steel that saves metal. It is an important part of steel, especially in oil drilling, production and metallurgy
[hot rolled strip / sheet] has the advantages of low hardness, easy processing and good ductility.
.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.
All decreased in varying degrees, with an average decrease of 7%. In terms of varieties, the prices of construction wire rod and rebar, which account for a large proportion of China's steel output, fell by 9% and 7% respectively, and the prices of medium and heavy plate and hot rolled coil fell by 7% and 7% respectively.
Hydraulic saw grinding disc (manual saw wire cutting machine).