Stainless stee
Stainless stee5 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.
According to different metallographic structure of stainless steel it is divided into semi Ferritic and semi martensitic stainless steel pipe, martensitic stainless steel pipe, austenitic ferritic stainless steel pipe, etc.
.Rheological and thermal changes in the quenching process of decorative stainless steel pipe the cooling characteristics of submerged quenching of stainless steel plate are numerically simulated by using the Euler multi fluid model in AVL fire software and the numerical results are compared with the experimental results. In the research, the quenching medium is water. The mass, momentum and energy equations of gas-liquid two-phase of quenching medium and the quenching heat conduction equation of stainless steel workpiece are solved by numerical simulation. Based on the principle of equal heat flux between quenching medium and workpiece, the temperature field of quenching medium and workpiece is solved by coupling. The comparison between the numerical simulation and experimental results of decorative stainless steel pipe shows that the numerical simulation results of workpiece temperature are in good agreement with the experimental data. The model can reliably simulate the quenching process of workpiece, and can be extended to the multiphase flow simulation in complex system to guide the actual production. The single pass thermal simulation compression experiment of 13Cr super martensitic stainless steel was carried out by Gleeble thermal simulation tester to study the thermal deformation behavior at 950 ~ 1200 ℃ and strain rate of 0.1 ~ 5 s-1, and the microstructure evolution law of grains under different conditions was analyzed; Based on Sellars hyperbolic sinusoidal model, the flow stress constitutive equation of 13Cr super martensitic stainless steel was constructed. The results show that the peak stress decreases with the increase of deformation temperature and the decrease of strain rate; With the increase of deformation temperature, the grain grows and coarsens gradually. With the increase of strain rate, the dynamic recrystallized grains are obviously refined. The thermal deformation activation energy Q = 519580.9 JMOL of decorative stainless steel pipe is calculated, and the expression of Zener Hollomon parameter is obtained. Different feedstocks were prepared by mixing cr17mn11mo3n nickel free austenitic stainless steel powder prepared by aerosol and wax based binder. The effects of binder ratio and powder loading on the rheological properties of feed were studied by rh5000 high pressure capillary rheometer. Non Newtonian index n, viscous flow activation energy E and comprehensive rheological factor alpha are calculated by second order model regression analysis; STV. The results show that the prepared feeds are pseudoplastic fluid. The binder system was composed of 65% microcrystalline wax (MW), 25% high density polyethylene (HDPE), 5% ethylene vinyl acetate copolymer (EVA) and 5% stearic acid (SA). The powder loading was 68 vol%. The feed had good comprehensive rheological properties. In order to study the cementitious properties of stainless steel AOD slag, stainless steel AOD slag was used to replace some cement, and its effects on the working properties and mechanical properties of cement mortar were studied. The results show that using stainless steel AOD slag to replace cement from 0 ~ 50%, with the increase of the content of stainless steel AOD slag, the water consumption of standard consistency of cement first decreases and then increases. When the content is 30%, the water reduction effect of stainless steel AOD slag is good; With the increase of the content of stainless steel AOD slag, the strength of cement mortar decreases in turn,Stainless steel pipe, indicating that the cementitious activity of stainless steel AOD slag is small.
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
.At low temperature, the quality of professional stainless steel plate, coil, strip and tube is guaranteed. The company is professional, while austenitic steel does not. Therefore, ferritic or martensitic stainless steels have low-temperature brittleness Austenitic stainless steel or nickel base alloy does not show low temperature brittleness. Sus410 (13Cr), SUS430 of ferritic stainless steel pipe (18cr) and others show a sharp drop in impact value at low temperature. Therefore it is necessary to pay special attention when using at low temperature. As a way to improve the impact toughness of ferritic series stainless steel, when the embrittlement temperature is improved in the range of - 50 ℃ to - 100 ℃ high purification process can be considered. With the help of grade C and N, it is possible to use it in freezing related projects Sus430lx (18cr Ti, Nb LC) and sus436l (18cr Mo Ti, Nb LC) have been applied to frozen shells. Ferritic stainless steel has a body centered cubic structure. When the material properties become weak, sharp cracks will expand rapidly and cause brittleness. Austenitic stainless steel will not produce brittleness because it has a face centered cubic structure. Austrian stainless steel SUSL (18cr-9ni LC) is used And SUSL (18cr-12ni-2mo-lc) show that they still have superior impact characteristics at low temperature. However, pay attention to the precipitation of ferrite or martensite due to processing, and the tendency of embrittlement due to sensitization and carbide or & sigma; equal heterogeneous precipitation.
Production process of hot rolled stainless steel strip / coil: 1. Pickling → 2. High temperature rolling → 3. Process → 4. Annealing → 5. Leveling → ⒍ fine cutting → ⒎ packaging → 8. Reach customers.
L stainless steel pipe is also called 00Cr17Ni14Mo2 stainless steel pipe. 00Cr17Ni14Mo2 is an ultra-low carbon steel of 0Cr17Ni12Mo2. 00Cr17Ni14Mo2 has better intergranular corrosion resistance than 0cr17ni14mo2. It is usually used to manufacture industrial equipment such as chemical industry, chemical fertilizer and chemical fiber, such as containers, pipelines and structural parts.
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)
The intergranular corrosion of austenitic stainless steel can be prevented by adding Ti, Nb and other elements that can form stable carbides (tic or NBC) and avoiding the precipitation of cr23c on the grain boundary.
At this time, we usually answer directly: no! What we produce is stainless steel decorative pipe, which belongs to stainless steel slotted pipe. It can not be used as stainless steel water pipe. If you want to choose stainless steel water pipe, you must choose stainless steel pipe.
Welcome calls .500 Series & mdash; Heat resistant chromium alloy steel.
The compressive strength of duplex stainless steel alloy is twice that of austenitic stainless steel. Compared with L and 317L the designer can reduce its weight. Alloy is especially suitable for & mdash; 50° F/+600° F temperature range, in strict cases (especially for welded structures) it can also be used for lower temperatures. C≤ 0.030 Mn≤ 00 Si≤ 00 p≤ 0.030 S≤ 0.020 CR 20 ～ 20 Ni 5 ～ 5 mo0 ～ 5 n0.14 ～ 0.20 (AUSTENITIC FERRITIC type)
Stainless steel pipes are divided into hot rolled, hot drawn and cold drawn (rolled) stainless steel pipes according to the connection and rolling process. According to the difference of stainless steel microstructure, martensitic stainless steel pipes, austenitic stainless steel pipes, austenitic ferritic stainless steel pipes, etc.
Its plastic toughness is lower than that of austenitic stainless steel, and its cold and hot working process and formability are not as good as that of austenitic stainless steel.
Process inspection.The cold rolled steel strip has good strength and yield ratio, and has superplasticity. Martensitic stainless steel. High strength, but poor plasticity and weldability.
The allowable depth of stainless steel straight track is also required. For hot-rolled and hot-rolled steel pipes, stainless steel pipes with diameter less than or equal to 140mm and not greater than 5% of the nominal wall thickness, the large depth is less than or equal to 0.5mm, cold drawn (rolled) stainless steel pipes are not greater than 4% of the nominal wall thickness, and the large depth is less than or equal to 0.3mm.
.The welding alloy has good weldability. Professional stainless steel plate, stainless steel coil, stainless steel belt, stainless steel pipe, large quantity,202 stainless steel plate, strong and durable, safe and reliable. The performance of the alloy is that the welding metal and heat deteriorated part still maintain the same corrosion resistance, strength and toughness as the base metal. It is not difficult to weld, but its welding procedure needs to be designed so that after welding, it can maintain a good phase balance and avoid the precipitation of harmful metal phase or non-metal phase. Welding can be carried out in the following equipment: GTAW (TIG); GMAW (MIG);SMAW (“stick” electrode); SAW;FCW;And paw stainless steel features: compared with L and 317L austenitic stainless steel, duplex stainless steel alloy has superior performance in spot corrosion and crack corrosion resistance. It has high corrosion resistance. Compared with austenite, it has lower thermal coefficient and higher thermal conductivity.
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, 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,Stainless steel braided belt, 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, 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, which will play an incomparable role in improving water quality and people's living standards.
Steel strip material: different steel strip materials determine the quality of stainless steel, which is a major factor affecting the price of stainless steel at present.