Tianjin China Sea radius of Steel Trade Co., Ltd. 
 Manager 022 -5,878,255,958,782,759 
 Mobile: 13920597028 Fax :022 -58,889,723 
 Deputy Manager 022 -5,888,973,081,244,922 
 Mobile: 13622156258 Fax :022 -58,889,723 
 Contact: Xia Bing 
 1] 202 stainless steel is widely used in architectural decoration, municipal engineering, highway guardrail, hotel facilities, shopping malls, glass handrails, public facilities and other places. By high-precision automation system equipment, through its own eclipse melting welding rolled forming, in the absence of any metal filler, filled with gas protection (outer) tubes welded, welding, TIG process, and for the line solution vortex testing. 

 Chemical composition 
 Chemical composition: 1Cr18Mn8Ni5N C: ≤ 0.15 


 Si: ≤ 1 


 Mn: 7.5-10 


 P: ≤ 0.06 


 S: ≤ 0.03 


 Ni: 4-6 


 Cr: 17-19 


 Mo: 


 Cu: 


 N: ≤ 0.25 


 Other: None 

 Stainless steel knowledge 
 Stainless steel (Stainless Steel) refers to the resistance of air, steam, water and other weak corrosive medium and acid, alkali, salt and other chemical etching medium corrosion of steel, also known as stainless steel acid. Practical applications, often weak corrosion medium corrosion resistance of steel known as stainless steel, and resistance to chemical corrosion medium steel 


 Known as acid-resistant steel. Due to both differences in chemical composition, the former is not necessarily chemical resistance to corrosion, while the latter generally has a stainless steel. The corrosion resistance of stainless steel depends on the alloying elements contained in the steel. 

 1. Types 

 Stainless steel is often the organization of the state is divided into: martensitic steels, ferritic steels, austenitic steels. In addition, ingredients can be divided into: chromium stainless steel, chrome-nickel stainless steel and chromium manganese nitrogen stainless steel. A ferritic stainless steel: chromium 12% to 30%. Its corrosion resistance, toughness and weldability with increasing chromium content increased, the resistance to chloride stress corrosion better than other types of stainless steel. Fall into this category Crl7, Cr17Mo2Ti, Cr25, Cr25Mo3Ti, Cr28. Ferritic stainless steel, high chromium content, resistance to corrosion and oxidation resistance are good, but poor mechanical properties and process performance, and more for the uneven force acid structure and for the antioxidant steel use. Parts, such as the type of steel to resist corrosion of the atmosphere, nitric acid and aqueous salt solutions, and high temperature oxidation performance characteristics of small thermal expansion coefficient for nitric acid and food plant equipment can be made to work at a high temperature gas turbine parts . Austenitic stainless steel: chromium greater than 18%, it also contains about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. Good overall performance, corrosion resistance to a variety of media. The common grades of austenitic stainless steel 1Cr18Ni9, 0Cr19Ni9. 0Cr19Ni9 steel wC <0.08%, steel, marked "0". Such steel contains a large number of Ni and Cr, so that the steel was austenitic state at room temperature. The type of steel has good ductility, toughness, weldability and the corrosion resistance, good corrosion resistance in oxidizing and reducing media, to the production of acid-resistant equipment, such as corrosion of containers and equipment lining, pipeline, resistance to nitric acid equipment parts. Austenitic stainless steel is generally used to solution heat treatment, the upcoming steel heated to 1050 to 1150 ℃, and then water-cooled, in order to obtain single-phase austenite. Austenitic - ferritic duplex stainless steel: both the advantages of austenitic and ferritic stainless steel, and has superplasticity. Austenitic and ferritic structure each accounted for about half of the stainless steel. Containing C lower Cr content of 18% to 28% of the nickel content of 3% to 10%. Some steel containing Mo, Cu, Si, Nb, Ti, N and other alloying elements. Class characteristics of the austenitic and ferritic stainless steel both, compared with the ferrite, ductility, toughness and higher, no room temperature brittleness, resistance to intergranular corrosion and welding properties were significantly improved, while also maintaining a brittleness of ferritic stainless steel 475 ° C and high thermal conductivity, with superplastic characteristics. Compared with austenitic stainless steel, high strength and resistance to intergranular corrosion and chloride stress corrosion has improved significantly. Duplex stainless steel has excellent resistance to pitting corrosion is also a section of nickel stainless steel. 4, martensitic stainless steel: high strength, ductility and poor weldability. Commonly used grades of martensitic stainless steel 1Cr13, 3Cr13, due to the higher carbon content, it has a high strength, hardness and wear resistance, corrosion resistance somewhat less demanding for the mechanical properties, corrosion resistance requirements of the general parts, such as springs, turbine blade, hydraulic press, valve and so on. Such steel is used in the quenching and tempering treatment. 

 2 stainless steel effect 

 Stainless steel will not cause corrosion, pitting, corrosion or wear. Stainless steel or construction materials of metal for one of the highest material strength. Stainless steel has good corrosion resistance, it is to make structural components permanently maintain the integrity of the engineering design. Chromium-containing stainless steel set of mechanical strength and high elongation in one, easy-to-parts manufacturing to meet the needs of architects and structural designers. 


 (3) typical use 


 Most of the requirements is a long-term to maintain the building's original appearance. In determining the type of stainless steel should I use, the main consideration is required by the standards of beauty, the location of atmospheric corrosion and to clean-up system. However, a growing number of other applications just to seek the structural integrity of impermeability. For example, the roof and side walls of industrial buildings. In these applications, the owner of the construction costs may be more important than the aesthetic, the surface is not very clean. 304 stainless steel are quite effective in a dry indoor environment. However, in villages and cities in order to outdoors to maintain the its appearance, they need regular cleaning. In polluted industrial areas and coastal areas, the surface is very dirty and even rust. But to get the aesthetic effect of the outdoor environment, requires the use of nickel-containing stainless steel. Therefore, the 304 stainless steel is widely used in curtain wall, side walls, roofs and other construction purposes, but in a serious erosion of industrial or marine atmosphere, preferably 316 stainless steel. Stainless steel sliding door now, people have been fully recognize the superiority of the use of stainless steel in structural applications. There are several design criteria, including 304 and 316 stainless steel. "Duplex stainless steel 2205 have good atmospheric corrosion resistance and high tensile strength and elastic limit strength blend European guidelines also include this steel. Shape of the product is actually stainless steel based on the standards of the metal shape and size of manufacturing, but also many special shapes. The most commonly used product is made of sheet and strip, plate production of special products, for example, production of hot-rolled structural steel and extruded structural sections. And round, oval, square, rectangular and hexagonal pipe or seamless steel pipe and other forms of products, including profiles, rods, wire and castings. 

 4, the surface state 

 As will be discussed later, in order to meet the aesthetic requirements of architects, has developed a variety of commercial surface processing. For example, the surface is highly reflective or dull; can be smooth, polished or embossed; can be colored, color, plating, or stainless steel surface is etched with patterns, drawing, and other to meet the various requirements of the design appearance. It is easy to maintain surface state. Just occasional wash will be able to remove the dust. Good corrosion resistance, you can also easily remove the contamination of the surface of the graffiti or other similar surface contamination. 
 ≤ 5 ≥ GB plate: good service, good quality, advanced technology, Pinsent cheap. You customers willing Interested parties may contact us, oh? Thank you for your cooperation. Welcome new and old customers come to discuss the orders!