Stainless steel coil with stainless steel reel introduce more wins Baike. Stainless steel grade grouping 
 200 Cr - Ni - Mn austenitic stainless steel 
 300 series of chromium - nickel austenitic stainless steel 
 Model 301 scalability for molding products through machining, rapid hardening the Weldability good abrasion resistance and fatigue strength than 304 stainless steel 
 Model 302 corrosion resistance with the 304, and thus the carbon content is relatively higher strength and better 
 Model 303 by adding a small amount of parathion it 304 easier cutting 
 Model 304 universal model; 18/8 stainless steel for grade 0Cr18Ni9 
 Model 309 have a better temperature resistance compared to 304 
 Model 316 after following 304, the second most widely used applications of steel, mainly for the food industry and surgical equipment, add molybdenum element to obtain the special structure of an anti-corrosion compared with 304 of its better resistance to chloride corrosion and thus marine steel SS316 is typically used for nuclear fuel recovery unit 18/10 stainless steel is usually to meet this level [1] 
 In addition to the added titanium elements to reduce the risk of corrosion of materials, weld properties similar to the Model 321 304 
 400 series ferritic and martensitic stainless steel 
 Model 408, good heat resistance, weak anti-corrosive, 11% Cr, 8% Ni 
 Model 409 of the cheapest models (BAR), usually as an automobile exhaust pipe, is a ferritic stainless steel (chrome steel) 
 Type 410 martensitic (high strength chrome steel), good wear resistance, corrosion resistance, poor 
 Model 416 add sulfur to improve the processing properties of the material 
 Model 420 cutting tool grade martensitic steels, Brinell high chromium steel, this stainless steel is also used in surgical tools that can be done very bright 
 Type 430 ferritic stainless steel, decorative, for example, for the good formability of automotive accessories, temperature resistance and corrosion resistance to differential 
 Model 440 high-strength cutting tool steel, carbon content is slightly higher, after appropriate heat treatment to obtain higher yield strength, hardness of 58 HRC is the most common examples of application of the hardest stainless steel column is a razor blade, there are three commonly used models: 440A440B440C, in addition to 440F (easy processing) 
 500 series of heat-resistant chromium alloy steel 
 600 series martensitic precipitation hardening stainless steel 
 Model 630 is the most commonly used precipitation hardening stainless steel models, usually called 17-4; 17% Cr, 4% Ni 


 Stainless steel why corrosion? 

 All metals react with atmospheric oxygen in the surface oxide film unfortunately yes, proceed with the formation of iron oxide in the ordinary carbon steel oxidation, corrosion expanding, and ultimately the formation of voids can use paint or oxidation resistance metal ( For example, zinc, nickel and chromium) plating to ensure that the carbon steel surface, However, as people know, this protection is only a thin film protective layer is damaged, the steel of the following corrosion 

 The corrosion resistance of stainless steel depends on chromium, because chromium is an integral part of one of the steel protection methods are not the same 

 Chrome add up to 10.5%, the atmospheric corrosion of steel can be significantly increased, but the higher chromium content, although it can still improve corrosion resistance, but the obvious reason is the steel alloying with chromium when the type of surface oxides changed to protect the surface of the surface oxide formed on pure chromium metal has become similar to this close adhesion of the chromium-rich oxide, to prevent the further oxidation of this oxide layer very thin, through it can see the natural sheen of the surface of steel, stainless steel with the unique surface and, if the surface is damaged, the exposed steel surface and atmospheric response to self-repair, re-formation of this "passive film" continue to play a protective role 

 Therefore, all stainless steel with a common feature, ie, the chromium content of 10.5% 

 The type of stainless steel 

 The term "stainless steel" is not merely refer to a stainless steel, but more than one hundred kinds of industrial stainless steel developed for each stainless steel has good performance and the key to success in their specific fields of application The first is to clarify the purpose , and then determine the correct steel stainless steel, further details can be found in the preparation by NiDI stainless steel guide "floppy disk 

 Fortunately, steel and building construction applications are usually only six kinds of them contain 17 to 22 percent chromium, better steels contain nickel to add molybdenum can be further improved atmospheric corrosion resistance, especially resistance to chloride-containing atmospheric corrosion 

 Atmospheric corrosion resistance 

 Experience has shown that the corrosion of the atmosphere varies from region to region for illustrative purposes, the proposed geographical split into four categories, namely: rural, urban, industrial areas and coastal areas 

 The village is essentially pollution-free area of ??the local population density is low, only non-polluting industries 

 City for a typical residential commercial and light industrial area, the area light pollution, such as traffic pollution 

 Regional pollution of the industrial zone for heavy industry cause air pollution may be due to the formation of fuel gases such as sulfur and nitrogen oxides, or release of chemical or processing plant other gases in the air suspended particles travel, like the steel production process deposition of dust or iron oxide also cause an increase in corrosion 

 Coastal areas, usually refers to but away from the area within one mile of beach, the ocean-atmosphere to the interior depth of spread, especially on the island, the prevailing winds from the ocean, and bad weather, for example, climatic conditions, so the whole countries belong to the coastal areas of wind mixed with the ocean mist, especially due to evaporation caused by the deposition of salt concentration, coupled with less rain, does not often rain washed the conditions of the coastal areas even more unfavorable if there is industrial pollution, corrosive the greater the 

 The research work carried out by the United States United Kingdom, France, Italy and Sweden and Australia have been identified in these regions affect the atmospheric corrosion resistance of various stainless steel content in the NiIDI published architect Fact Sheet briefly introduced the book table can help the designer select the most cost-effective stainless steel for a variety of regional 

 In making this choice, it is important to determine whether there are local factors that affect the use environment of the scene for example, stainless steel used in the bottom of the factory chimneys, used in air conditioning near the exhaust baffle or scrap near the general conditions 

 Repair and clean-up 

 And other materials exposed to the atmosphere, stainless steel will dirty the next lecture will analyze the design factors affect the maintenance and clean-up costs, however, rain erosion, artificial flushing and dirty between the surface there is a relationship between 

 The effect of manual flushing of the same lath directly on the atmosphere and stored in a shed to determine the effects of rain erosion through artificial sponge coated with soapy water every six months to scrub the right of each piece of lath definite results, compared with the slats on the shed and washing by rain wash and manual scrubbing to remove surface dust and deposition on the surface conditions have a good effect but also found that the surface processing The conditions also affect the smooth surface of the slat surface area of ??rough slats better than 

 Scrubbing interval affected by many factors, the main factor is required by the aesthetic standards of many stainless steel curtain wall just in Cabo when flushing However, in general, stainless steel for external annual washing twice 

 Typical use 

 Most of the requirements of the aesthetic standards of the required long-term to maintain the original appearance of the buildings, the main consideration in determining the type of stainless steel should I use the location of atmospheric corrosion and to clean-up system 

 However, a growing number of other applications just to seek the structural integrity or not permeable for example, the roof and side walls of industrial buildings in these applications, the owner of the construction costs than the aesthetic is more important, the surface is not very clean can 

 Use of 430 stainless steel effect in a dry indoor environment is quite good, but in rural and urban in order to open to maintain their appearance, they need regular cleaning in polluted industrial areas and coastal areas, the surface is very dirty and even rust, but To obtain the aesthetic effect of the outdoor environment, it requires the use of nickel-containing stainless steel, 304 stainless steel is widely used in curtain wall and side walls roof and other construction purposes, but in a serious erosion of industrial or marine atmosphere, preferably 316 stainless steel 

 Now, people have been fully aware of the superiority of the use of stainless steel in structural applications has several design criteria, including 304 and 316 stainless steel because the "duplex" stainless steel 2205 have good atmospheric corrosion resistance and high tensile strength and bomb limited intensity integration, European guidelines also included in this steel 

 Shape of the product 

 In fact, stainless steel based on the standards of the metal shape and size of manufacturing, but also many special shape of the most commonly used product is made of sheet and strip, plate production of special products, such as the production of thermal rolled structural steel and extruded structural steel and round oval square rectangular and hexagonal pipe or seamless steel pipe products and other forms, including the profile bar wire and castings 

 Surface state 

 As will be discussed later, in order to meet the aesthetic requirements of architects, has developed a variety of commercial surface processing such as the surface can be highly reflective or dull; can be smooth polished or embossed ; coloring color plating or stainless steel surface is etched with designs to meet the various requirements of the designers on the appearance of 

 Maintaining the surface condition is easy to just occasional wash will be able to remove the dust due to good corrosion resistance, can also be easily removed graffiti pollution of surface or other similar surface contamination 

 Design 

 Than 60 years since the architect has been made of stainless steel to build cost-effectiveness of a good many of the existing buildings of permanent structures to fully explain the correctness of this choice of some very entertaining, such as the Chrysler Building in New York City But in many other applications, the role played by the stainless steel is not so noticeable, but plays an important role in the aesthetics and performance of the building but such as wear resistance and stainless steel more than any other metal material of the same thickness indentation, so the turnover rate in the population, the construction of the sidewalk, it is the preferred material for designers 

 Stainless steel used for construction of new buildings and structural materials for restoration of historic monuments for more than 70 years of the early design is calculated in accordance with the basic principles, design specifications, for example, the standards of the American Society of Civil Engineers ANSI/ASCE- 8-90 "cold-formed stainless steel structural design specification", published jointly by and NiDI Euro Inox "Structural Stainless Steel Design Manual" has been simplified a long life, good integrity of the building structural design 

 Future 

 Stainless steel has been with the construction materials required by many the ideal performance, it can be said that in the metal is unique, and its development is still to continue to make stainless steel to better performance in traditional applications, has been in the improvement of existing types, and being developed, in order to meet the stringent requirements of the senior building applications, new stainless steel due to the continuous improvement of production efficiency, quality and continuous improvement, stainless steel has become one of the architects to select the most cost-effective materials 

 Stainless steel set performance look and features a stainless steel will continue to be one of the world's best building materials 


 Methods of identification of stainless steel 
 Number and the representation of the steel 
 International chemical element symbols and their symbols to represent the chemical composition, using the Arabic alphabet to represent the ingredient: 
 Such as: Russia 12CrNi3A 
 With a fixed digit number to represent the steel series or digital; such as: USA and Japan 300 series 400 series 200 series; 
 Latin and sequence composition of the serial number, saying only that the use 
 Number of rules in China 
 By elemental symbols 
 Use Hanyu Pinyin, the open-hearth steel: P rimmed steel: F-killed steel: B A steel: AT8: Special 8 
 Of GCr15: Ball 
 All structural steel spring steel, such as: 20CrMnTi 60SiMn (very few C content) 
 Stainless steel, alloy tool steel (a few thousandths of C content), such as: 1Cr18Ni9 thousandth (ie, 
 0.1% C) stainless C0.08% 0Cr18Ni9 such as ultra-low carbon C0.03%, such as 0Cr17Ni13Mo 
 International Stainless Steel labeling method 
 American Iron and Steel Institute is a malleable stainless steel, which use three-digit number to mark a variety of standard class: 
 Austenitic stainless steel 200 and 300 series of numbers marked, 
 For example, some of the more common austenitic stainless steel of ferritic and martensitic stainless steel 400 series digital 
 Based on 201 304 316 310 mark, 
 Ferritic stainless steel is 430 and 446 for the tag, the martensitic stainless steel is 410 420 and 440C as standard 
 Hutchison, duplex (austenitic - ferritic body) 
 High alloy stainless steel precipitation hardening stainless steel and iron content of less than 50% is usually the name of the patent or trademark name 
 4) Classification and grading of the standard 
 4-1 classification: 
 National Standard GB 
 Industry standard YB 
 Local standards 
 Enterprise standard Q / CB 
 4-2 Category: 
 Product standards 
 Packaging standards 
 Standard Methods 
 Basic standards 
 4-3 standard level (three levels): 
 Y: the international advanced level 
 Class I: the international level 
 Class H: domestic advanced level 
 4-4 GB 
 GB1220-84 stainless steel rods (Level I) 
 GB4241-84 stainless steel welded plate Park (H) 
 GB4356-84 stainless steel welded plate Garden (Level I) 
 GB1270-80 stainless steel pipe (Level I) 
 GB12771-91 stainless steel pipe (Y class) 
 GB3280-84 stainless steel cold plate (Level I) 
 GB4237-84 stainless steel hot plate (Level I) 
 GB4239-91 stainless steel cold strip (Level I) 
 Contact: Lei Zhu Tel: 13928628186 Fax 0757-28369602 QQ: 514 289 745