SPHDSPHD—& mdash; Hot rolled steel plate and strip for stamping.
The specification and appearance quality shall comply with the provisions of gb14975-2002 stainless steel seamless steel pipe. The steel pipe is usually 5 ~ 10m long (indefinite length) hot rolled steel pipe, and the hot-rolled steel pipe is equal to or greater than 1m. The wall thickness of cold drawn (rolled) steel pipe is 0.5 ~ 0mm, 0 ~ 7m; the wall thickness is greater than 0mm, 5 ~ 8m.
.Application field: launch the market plan of stainless steel pipe in the target market of new products, 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.
.Usage: it is widely used in automobile industry, aviation industry and other departments.
The existence of medium temperature brittle zone requires strict heat treatment and welding process system to avoid the appearance of harmful phase and damage the performance.
Stainless steel is a common steel in stainless steel, also known as 188 stainless steel. It is characterized by high temperature resistance, excellent processing performance and good toughness, so it is made into a frequently used steel. Common in life are stainless steel pipe, stainless steel plate, stainless steel coil and other building materials. As a very important building material stainless steel is widely used in industry, construction industry, Xiaobian will tell you in detail about L stainless steel pipe installation technology.
Ferritic and martensitic stainless steels are represented by 400 series numbers. Ferritic stainless steel is marked with 430 and 446, martensitic stainless steel is marked with 4420 and 440C, dual phase (austenite ferrite).
mdash; Martensitic precipitation hardening stainless steel.
Recommendation and consultation.High temperature oxidation resistance stainless steel plates have high temperature oxidation resistance, but the oxidation rate will be affected by inherent factors such as environment and product form.
201 series & mdash; Chromium nickel manganese austenitic stainless steel.
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
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.
Design brand. 303— Add a small amount of sulfur and phosphorus to make it easier to cut.
For more than 60 years, architects have been using stainless steel to build cost-effective buildings. Many existing buildings fully illustrate the correctness of this choice. Some are very ornamental, such as the Chrysler Building in New York City. However, in many other applications, the role of stainless steel is not so eye-catching, but in the aesthetics and performance of buildings For example, because stainless steel has more wear resistance and pressure resistance than other metal materials of the same thickness, it is the preferred material for designers when building sidewalks in places with large population flow.
303— Add a small amount of sulfur and phosphorus to make it easier to cut.
.Cutting tool level & rdquo; Martensitic steel, an early stainless steel similar to Brinell high chromium steel. It is also used for surgical tools, which can be made very bright.
(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 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, 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.
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.