According to the steel structure, austenite ferrite ferrite martensite and precipitation hardening note: precipitation hardening (precipitation strengthening): refers to a heat treatment process in which the metal is hardened by the segregation zone of solute atoms in supersaturated solid solution and / or the desolved particles are dispersed in the matrix. For example, austenitic precipitated stainless steel can obtain high strength by precipitation hardening at 400 ~ 500 ℃ or 700 ~ 800 ℃ after solution treatment or cold working. That is, the supersaturated solid solution of some alloys is placed at room temperature or heated to more & amp; gt;& amp; gt;
(soft, 1 / 23 / 4h) and other primary and secondary stainless steel coils.
.Stainless steel has been used as a structural material for building new buildings and repairing historic sites for more than 70 years. Early designs were calculated according to basic principles. Today, design codes, such as ANSI as of the American Society of civil engineers, are used
Because the family kitchen and are in the same environment for a long time, the ordinary steel pipe will rust after being used for a period of time, the service life is not long, and it will affect the safety of family drinking water! Therefore, the use of stainless steel pipe here can ensure long-term non rusting, and the corrosion resistance and tensile resistance of stainless steel pipe itself. Professional stainless steel plate, stainless steel coil, stainless steel belt, stainless steel pipe, safety, environmental protection and economy! The products are exported to foreign countries and are deeply trusted, with the characteristics of beautiful weld formation and small welding deformation.
D-outer diameter (mm) as stainless steel pipe for reprocessing device, or silicon and phosphorus content in Nb steel. In addition, in order to improve the corrosion resistance of ULC steel, the steel industry with phosphorus content below 0.015% is manufactured. After 20 times of 65% boiling corrosion test, it is found that if the corrosion degree of the solution treated material is less than 0.1mm/a, 650 ℃ & times; The sensitized material for 2h has excellent corrosivity when the corrosion degree is less than 0.2mm/a.
There are ba face, 2b face, (white skin), 2D face, HL (wire drawing), 8K face and other surfaces with good quality and brightness.
Austenitic stainless steel. It contains more than 18% chromium, about 8% nickel and a small amount of molybdenum, titanium,How much is the stainless steel pipe, nitrogen and other elements. Good comprehensive performance and resistance to corrosion of various media.
The thickness of cold rolled steel strip is ultra-thin, resulting in the continuous accumulation of holes,Stainless steel round pipe 304, weakening the material, and finally forming macro cracks, resulting in the fracture of stainless steel pipe material. Compared with room temperature, high temperature promotes the accelerated oxidation of materials and the accelerated diffusion of atoms. Under the action of stress, the interaction between internal defects and dislocations can significantly reduce the low cycle fatigue performance of stainless steel tubes. The law of creep deformation of stainless steel pipe can be described by creep curve, which reflects the relationship between deformation and time under specific temperature and stress structure. The typical creep curve includes three stages: creep stage, with a gradually slowing creep rate; The second stage of creep: steady-state creep stage, which is an important stage when the stress process and recovery process reach equilibrium; In the third stage of creep, the creep process accelerates until fracture.
Polishing at present, stainless steel products are generally polished in the production process, and only a few products such as water heater and water dispenser lining do not need polishing. Therefore, this requires good polishing performance of raw materials. The main factors affecting the polishing performance are as follows: 1. Surface defects of raw materials. Such as scratch, pitting, soaking, etc.
The above conditions can cause corrosion of the protective film on the surface of stainless steel.
In the building water supply pipe system, 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, strict testing, 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
Welcome calls . 410— Martensite (high strength chromium steel), good wear resistance and poor corrosion resistance.
The petrochemical industry, including the chemical fertilizer industry, has a great demand for stainless steel pipes. Stainless steel pipes are mainly used in this industry, including,SUS304 stainless steel pipe, 32, 34317l, etc., with an outer diameter of about ￠ 18 - ￠ 610 and a wall thickness of about 6mm-50mm (generally medium and low pressure transmission pipes with a specification of more than & phi; 159mm). The specific application fields are: furnace pipes, material transmission pipes, heat exchanger pipes, etc.
Origin: domestic and imported (Sweden, Japan, Finland, South Korea South Africa and Taiwan); classified according to the thickness of thin plate (0.2mm-4mm), medium plate (4mm-20mm), thick plate (20mm-60mm) and extra thick plate, according to the production of hot-rolled steel plate and cold-rolled steel
.5 identification number and indication use international chemical element symbols and national symbols to indicate chemical composition. For a long time, stainless steel plate, stainless steel coil stainless steel belt and stainless steel pipe have complete products, excellent quality and favorable price. Use letters to indicate composition content: for example, China and Russia use fixed digits to indicate steel series or numbers; for example the United States, Japan, 300 series 400 series 200 series; the serial number is composed of Latin letters and order, which only indicates the purpose.
Usage: it is widely used in automobile industry, aviation industry and other departments.
2B cold rolling shall be subject to heat treatment, pickling or similar treatment, and then leveled to obtain appropriate gloss.